Precede
Precede RELEASE 5 USER’S MANUAL
ENGINEERING DYNAMICS, INC. 2113 38TH STREET KENNER, LOUISIANA 70065 U.S.A. No part of this document may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher.
Copyright 1998 by
ENGINEERING DYNAMICS, INC. Printed in U.S.A.
Precede
Precede TABLE OF CONTENTS 1.0 INTRODUCTION ....................................................................................................................... 1.1 GENERAL INFORMATION ............................................................................................... 1.2 PROGRAM OVERVIEW .................................................................................................... 1.2.1 System Configuration ..................................................................................................
1-1 1-1 1-1 1-1
2.0 GETTING STARTED ................................................................................................................. 2.1 BEGINNING A MODELING SESSION ............................................................................. 2.2 GENERATING A JACKET STRUCTURE ......................................................................... 2.2.1 Jacket Information ....................................................................................................... 2.2.2 Non-grouted Structures ............................................................................................... 2.2.3 Grouted Structures ....................................................................................................... 2.2.4 Pile Stubs ..................................................................................................................... 2.2.5 Conductors ................................................................................................................... 2.2.6 Specifying Leg Data .................................................................................................... 2.2.7 Parallel Bracing Layout ............................................................................................... 2.3 DEFAULT GROUP NAMES ............................................................................................... 2.4 UNDO AND REDO ............................................................................................................. 2.5 EXITING THE MODELING SESSION ..............................................................................
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3.0 FILE FEATURES ....................................................................................................................... 3.1 NEW ..................................................................................................................................... 3.2 OPEN .................................................................................................................................... 3.3 SAVE .................................................................................................................................... 3.4 SAVE AS .............................................................................................................................. 3.5 SAVE NPF AS ...................................................................................................................... 3.6 SETTINGS ............................................................................................................................ 3.7 PLOT ..................................................................................................................................... 3.7.1 Title ............................................................................................................................. 3.7.2 Screen .......................................................................................................................... 3.7.3 Full Set ........................................................................................................................ 3.7.4 Faces ............................................................................................................................ 3.7.5 Plans ............................................................................................................................ 3.7.6 Views ........................................................................................................................... 3.7.7 Select Views ................................................................................................................ 3.8 PAGE SETUP ....................................................................................................................... 3.9 EXPORT ............................................................................................................................... 3.9.1 Windows Clipboard ..................................................................................................... 3.9.2 Neutral Picture File ..................................................................................................... 3.9.3 DXF ............................................................................................................................. 3.9.4 Windows Metafile ....................................................................................................... 3.10 EXIT ...................................................................................................................................
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4.0 DISPLAY FEATURES ............................................................................................................... 4.1 ACTIVE/ISOMETRIC ......................................................................................................... 4.2 FACE .................................................................................................................................... 4.3 PLAN .................................................................................................................................... 4.4 PLANE ..................................................................................................................................
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4.4.1 3 Joints ......................................................................................................................... 4.4.2 XY Plane ..................................................................................................................... 4.4.3 XZ Plane ...................................................................................................................... 4.4.4 YZ Plane ...................................................................................................................... 4.4.5 XY Volume ................................................................................................................. 4.4.6 XZ Volume .................................................................................................................. 4.4.7 YZ Volume .................................................................................................................. 4.4.8 Reset Volumes ............................................................................................................. 4.5 SELECT ................................................................................................................................ 4.6 RESET SELECT ................................................................................................................... 4.7 LABELING ........................................................................................................................... 4.7.1 Joints ............................................................................................................................ 4.7.2 Members ...................................................................................................................... 4.7.3 Plates ........................................................................................................................... 4.7.4 Shell ............................................................................................................................. 4.7.5 Load ............................................................................................................................. 4.7.6 Special ......................................................................................................................... 4.8 LOAD DIAGRAM ............................................................................................................... 4.9 ROTATE ............................................................................................................................... 4.10 2 LINE ................................................................................................................................ 4.11 SHOW IN 3-D .................................................................................................................... 4.12 ZOOM BOX ....................................................................................................................... 4.12.1 Zoom Display ............................................................................................................ 4.12.2 Delete Joints .............................................................................................................. 4.12.3 Delete Elements ......................................................................................................... 4.12.4 Delete Members ........................................................................................................ 4.12.5 Delete Plates .............................................................................................................. 4.12.6 Increment Joints ........................................................................................................ 4.12.7 Translate/Rotate ......................................................................................................... 4.12.7.1 General ............................................................................................................. 4.12.7.2 Mirror Image .................................................................................................... 4.12.7.3 About a Line .................................................................................................... 4.12.8 Joint Design ............................................................................................................... 4.13 UNZOOM ........................................................................................................................... 4.14 VIEW .................................................................................................................................. 4.14.1 Select ......................................................................................................................... 4.14.2 Save ........................................................................................................................... 4.14.3 Delete ......................................................................................................................... 4.14.4 Rename Bin ............................................................................................................... 4.15 CYLINDER ........................................................................................................................ 4.15.1 Flat ............................................................................................................................. 4.15.2 Round ........................................................................................................................ 4.16 DIMENSIONS .................................................................................................................... 4.16.1 Add ............................................................................................................................ 4.16.2 Edit ............................................................................................................................ 4.16.3 Delete ......................................................................................................................... 4.16.4 Settings ......................................................................................................................
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4.16.4.1 Text .................................................................................................................. 4.16.4.2 Direction .......................................................................................................... 4.16.4.3 Measure ............................................................................................................ 4.16.4.4 Line type .......................................................................................................... 4.16.4.5 Arrowhead ........................................................................................................ 4.17 SACS 3D ............................................................................................................................. 4.17.1 3D Solid ..................................................................................................................... 4.17.1.1 File ................................................................................................................... 4.17.1.2 Display .............................................................................................................
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5.0 JOINT FEATURES ..................................................................................................................... 5.1 DETAILS/MODIFY ............................................................................................................. 5.2 FIND ..................................................................................................................................... 5.3 DISTANCE ........................................................................................................................... 5.4 ADD ...................................................................................................................................... 5.4.1 Absolute ....................................................................................................................... 5.4.2 Relative ........................................................................................................................ 5.4.3 Intersection .................................................................................................................. 5.4.4 Relative to a Line ........................................................................................................ 5.4.4.1 Length ................................................................................................................ 5.4.4.2 X-coordinate ...................................................................................................... 5.4.4.3 Y-coordinate ...................................................................................................... 5.4.4.4 Z-coordinate ....................................................................................................... 5.4.4.5 Angle .................................................................................................................. 5.4.5 Divide a Line ............................................................................................................... 5.5 GRID ..................................................................................................................................... 5.6 MESH ................................................................................................................................... 5.6.1 Rectangular .................................................................................................................. 5.6.2 Cylindrical ................................................................................................................... 5.6.3 Spherical ...................................................................................................................... 5.7 MOVE ................................................................................................................................... 5.8 RENAME .............................................................................................................................. 5.9 REORDER ............................................................................................................................ 5.10 TRANSLATE/ROTATE .................................................................................................... 5.10.1 General ...................................................................................................................... 5.10.2 Mirror Image ............................................................................................................. 5.10.3 About a Line .............................................................................................................. 5.11 DELETE ............................................................................................................................. 5.12 DELETE MANY ................................................................................................................ 5.13 FIXITIES ............................................................................................................................ 5.14 SPRINGS ............................................................................................................................ 5.15 DESIGN .............................................................................................................................. 5.15.1 Automatic .................................................................................................................. 5.15.2 Manual ....................................................................................................................... 5.15.2.1 File ................................................................................................................... 5.15.2.2 Display ............................................................................................................. 5.15.2.3 Modify Offsets .................................................................................................
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5.15.3 Include Joint .............................................................................................................. 5.15.4 Exclude Joint ............................................................................................................. 5.15.5 Reset the List .............................................................................................................
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6.0 MEMBER FEATURES ............................................................................................................... 6.1 DETAILS/MODIFY ............................................................................................................. 6.2 OFFSETS .............................................................................................................................. 6.3 FIND ..................................................................................................................................... 6.4 ADD ...................................................................................................................................... 6.5 STRING ................................................................................................................................ 6.6 X-BRACE ............................................................................................................................. 6.7 K-BRACE ............................................................................................................................. 6.8 WISHBONE ......................................................................................................................... 6.9 DIVIDE ................................................................................................................................. 6.9.1 Ratio ............................................................................................................................ 6.9.2 Length .......................................................................................................................... 6.9.3 XY Plane ..................................................................................................................... 6.9.4 XZ Plane ...................................................................................................................... 6.9.5 YZ Plane ...................................................................................................................... 6.9.6 Equal Parts ................................................................................................................... 6.9.7 Perpendicular ............................................................................................................... 6.9.8 On Member .................................................................................................................. 6.10 DELETE ............................................................................................................................. 6.11 DEFINE DEFAULTS ......................................................................................................... 6.12 SET TO DEFAULT ............................................................................................................ 6.13 DEFINE AS ........................................................................................................................ 6.13.1 X-brace ...................................................................................................................... 6.13.2 K-brace ...................................................................................................................... 6.13.3 Through On Line ....................................................................................................... 6.13.4 Through Off Line ...................................................................................................... 6.14 DUPLICATE/MIRROR ..................................................................................................... 6.14.1 Duplicate Face ........................................................................................................... 6.14.2 Duplicate Plan ........................................................................................................... 6.14.3 Mirror Face ................................................................................................................ 6.15 MESH TUBULAR ..............................................................................................................
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7.0 PLATE FEATURES ................................................................................................................... 7.1 DETAILS/MODIFY ............................................................................................................. 7.2 OFFSETS .............................................................................................................................. 7.3 FIND ..................................................................................................................................... 7.4 ADD TRIANGULAR ........................................................................................................... 7.5 ADD QUADRILATERAL ................................................................................................... 7.6 RENAME .............................................................................................................................. 7.7 DIVIDE ................................................................................................................................. 7.8 DELETE ............................................................................................................................... 7.9 DEFINE DEFAULTS ........................................................................................................... 7.10 SET TO DEFAULT ............................................................................................................
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7.11 LOCAL Z UP ...................................................................................................................... 7.12 LOCAL Z DOWN .............................................................................................................. 7.13 SHELL ELEMENT ............................................................................................................
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8.0 PROPERTY FEATURES ........................................................................................................... 8.1 MEMBER GROUP ............................................................................................................... 8.2 MEMBER SECTION ........................................................................................................... 8.3 PLATE GROUP .................................................................................................................... 8.4 PLATE STIFFENER SECTION .......................................................................................... 8.5 K FACTOR ........................................................................................................................... 8.5.1 Ky & Kz ...................................................................................................................... 8.5.2 Ky ................................................................................................................................ 8.5.3 Kz ................................................................................................................................ 8.5.4 Lb=Lz Toggle .............................................................................................................. 8.6 EFFECTIVE LENGTH ........................................................................................................ 8.6.1 Ly & Lz ....................................................................................................................... 8.6.2 Ly ................................................................................................................................. 8.6.3 Lz ................................................................................................................................. 8.6.4 Lb=Lz Toggle .............................................................................................................. 8.7 UNBRACED LENGTH, LB ................................................................................................ 8.8 CONCRETE ......................................................................................................................... 8.8.1 Groups ......................................................................................................................... 8.8.2 Sections ....................................................................................................................... 8.8.3 Rebar ........................................................................................................................... 8.8.4 Slab Group ................................................................................................................... 8.8.5 Slab Rebar ...................................................................................................................
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9.0 LOAD FEATURES ..................................................................................................................... 9.1 JOINTS ................................................................................................................................. 9.2 SPECIFIED DEFLECTIONS ............................................................................................... 9.3 MEMBER ............................................................................................................................. 9.4 MEMBER GROUPS ............................................................................................................ 9.5 PRESSURE ........................................................................................................................... 9.5.1 Simple .......................................................................................................................... 9.5.2 Complex ...................................................................................................................... 9.5.3 Plate Area .................................................................................................................... 9.5.4 Plates ........................................................................................................................... 9.6 SKID ..................................................................................................................................... 9.7 MOVE EQUIPMENT ........................................................................................................... 9.8 DUPLICATE EQUIPMENT ................................................................................................ 9.9 DEAD LOADS ..................................................................................................................... 9.10 DELETE LC ....................................................................................................................... 9.11 DUPLICATE LC ................................................................................................................ 9.12 COMBINE LC .................................................................................................................... 9.13 RING/ANODE .................................................................................................................... 9.13.1 Ring Table ................................................................................................................. 9.13.2 Rings ..........................................................................................................................
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9.13.3 Anodes .......................................................................................................................
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10.0 SEASTATE FEATURES .......................................................................................................... 10.1 GLOBAL PARAMETERS ................................................................................................. 10.1.1 Drag/Mass Coeff ....................................................................................................... 10.1.2 Reynolds Number ...................................................................................................... 10.1.3 Marine Growth .......................................................................................................... 10.1.4 Wind Area ................................................................................................................. 10.1.5 Wind Shield Zones .................................................................................................... 10.1.6 Submerged Area ........................................................................................................ 10.1.7 Submerged Volume ................................................................................................... 10.1.8 Group Override .......................................................................................................... 10.1.9 Member Override ...................................................................................................... 10.1.10 Plate Override .......................................................................................................... 10.1.11 Dummy Structure .................................................................................................... 10.1.12 Appurtenance Structures ......................................................................................... 10.1.12.1 Appurtenance Groups .................................................................................... 10.1.12.2 Appurtenance Members ................................................................................. 10.1.12.3 Appurtenance Joints ....................................................................................... 10.1.13 Report ...................................................................................................................... 10.2 LOADING .......................................................................................................................... 10.2.1 Wind .......................................................................................................................... 10.2.2 Current ....................................................................................................................... 10.2.3 Dead load ................................................................................................................... 10.2.4 Wave .......................................................................................................................... 10.2.5 Mudflow .................................................................................................................... 10.2.6 Drag ........................................................................................................................... 10.2.7 Group Override .......................................................................................................... 10.2.8 Member Override ...................................................................................................... 10.2.9 Plate Override ............................................................................................................ 10.2.10 Load Label ............................................................................................................... 10.2.11 LC Component Factors ........................................................................................... 10.2.12 Transfer Function .................................................................................................... 10.2.13 Repeat LC ................................................................................................................ 10.3 OPTIONS ............................................................................................................................
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11.0 REPORT FEATURES ............................................................................................................... 11.1 JOINTS ............................................................................................................................... 11.2 MEMBERS ......................................................................................................................... 11.2.1 Member Offsets ......................................................................................................... 11.3 PLATES .............................................................................................................................. 11.3.1 Plate Offsets .............................................................................................................. 11.4 SHELLS .............................................................................................................................. 11.5 PROPERTIES ..................................................................................................................... 11.5.1 Member Groups ......................................................................................................... 11.5.2 Member Sections ....................................................................................................... 11.5.3 Plate Groups ..............................................................................................................
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11.5.4 Plate Stiffeners .......................................................................................................... 11.5.5 Library ....................................................................................................................... 11.6 LOADS ............................................................................................................................... 11.6.1 Contents ..................................................................................................................... 11.6.2 Summation ................................................................................................................. 11.6.3 All Above .................................................................................................................. 11.6.4 Sum By Ids ................................................................................................................ 11.7 MODEL INFO .................................................................................................................... 11.8 TEXT FILE .........................................................................................................................
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12.0 OPTIONS FEATURES ............................................................................................................. 12.1 ANALYSIS ......................................................................................................................... 12.2 SELECT LOAD CONDITION ........................................................................................... 12.2.1 Standard ..................................................................................................................... 12.2.2 Dynamic Mass ........................................................................................................... 12.2.3 P-Delta ....................................................................................................................... 12.3 LOAD CONDITION FACTOR ......................................................................................... 12.3.1 Standard ..................................................................................................................... 12.3.2 Dynamic Mass ........................................................................................................... 12.3.3 P-Delta ....................................................................................................................... 12.4 ALLOWABLE STRESS/ MAT FACTOR ......................................................................... 12.5 UNITY CHECK RANGES ................................................................................................. 12.6 REDESIGN ......................................................................................................................... 12.7 REDESIGN DT .................................................................................................................. 12.8 HYDROSTATIC COLLAPSE ........................................................................................... 12.9 CONCRETE .......................................................................................................................
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13.0 MISCELLANEOUS FEATURES ............................................................................................. 13.1 TITLE ................................................................................................................................. 13.2 MODIFY LEG .................................................................................................................... 13.3 CREATE LEG .................................................................................................................... 13.4 DEFINE LEG ...................................................................................................................... 13.5 MODIFY ELEVATION ..................................................................................................... 13.6 CREATE CONDUCTOR ................................................................................................... 13.7 MERGE ............................................................................................................................... 13.8 CHECK MODEL ................................................................................................................
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14.0 HELP FEATURES ....................................................................................................................
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A.0 APPENDIX ................................................................................................................................ A.1 PRECEDE COMMENT DATA .......................................................................................... A.1.1 Leg Data Comment #1 ................................................................................................ A.1.2 Leg Data Comment #2 ................................................................................................ A.1.3 Elevation Data Header ................................................................................................ A.1.4 Elevation Data Comment ........................................................................................... A.1.5 Leg Member Group Label Data .................................................................................. A.1.6 Pile Member Group Label Data .................................................................................. A.1.7 Jacket Row Definitions ...............................................................................................
A-1 A-1 A-1 A-1 A-1 A-2 A-2 A-2 A-2
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A.1.8 User Defined View Comment #1 ............................................................................... A.1.9 User Defined View Comment #2 ............................................................................... A.1.10 User Defined View Comment #3 ............................................................................. A.1.11 User Defined View Comment #4 ............................................................................. A.1.12 User Defined View Comment #5 ............................................................................. A.1.13 User defined View Comment #6 .............................................................................. A.1.14 User Defined View Comment #7 ............................................................................. A.1.15 Special Joint Designator Data .................................................................................. A.1.16 Special Member Designator Data ............................................................................. A.1.17 Equipment Definition Comment #1 ......................................................................... A.1.18 Equipment Definition Comment #2 ......................................................................... A.1.19 Equipment Definition Comment #3 ......................................................................... B.0 INDEX ........................................................................................................................................
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SECTION 1
INTRODUCTION
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Precede 1.0 INTRODUCTION This program was developed to provide the design engineer with an intuitive and efficient tool with which geometric structures may be defined and manipulated.
1.1 GENERAL INFORMAT ION Input to this program may be in the form of an ASCII SACS data file, a binary restart file generated from a previous version of Precede, or there may be no previously defined input data. This program provides for special handling of structures that are jacket oriented, but is also adept at handling non-jacket structures. Precede can automatically generate 5 different structure types, such as jackets, decks, dolphin/wharves, towers or space frames. For example, jackets with 1, 3, 4, 6 or 8 main legs may be automatically generated with grouted or non-grouted piles. Structures generated using the automatic generation facility have elevation, plan and face views created that may be displayed easily. Section 2.2 addresses the jacket generation facilities in detail. Output from Precede consists of an ASCII SACS model input file to be used by the SACS system. Model plots maybe generated directly inside of Precede using any installed plotter or printer (refer to the Windows documentation for complete details). Model report files may also be generated from Precede. During any modeling session, each operation performed on a joint, member or plate is saved in an edit file. An "Undo" operation is available to retrace any inadvertent or incorrect steps, and a "Redo" operation is available to retrace an inadvertent "Undo" operation. The program has the capability to store the last one hundred operations.
1.2 PROGRAM OVERVIEW 1.2.1 System Configuration Before executing Precede for the first time, the SACS system configuration file should be generated using the SACS Executive. Precede accesses the configuration file name "configg.sac" defined by environmental variable "SACGCFG". Data from the configuration file is used in all subsequent executions and may be edited by using the SACS Executive. If the configuration file is not found or if the file does not exist, Precede will exit with a "configuration file not found" error message. Note: The environmental variable "SACGCFG" must contain the full path name of the configuration file including the filename.
The configuration parameters used in Precede may be changed for the current session using the File/Setup option.
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1-2
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SECTION 2
GETTING STARTED
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Precede 2.0 GETTING STARTED 2.1 BEGINNING A MODEL ING SESSION The Precede modeling session is begun by double clicking on the Precede Model icon found within SACS Executive. After double clicking on the Model icon, the user may Open the last file edited, create a new structure, or edit an existing model. Within Precede an existing structure may be modified(File/Open) or a new structure may be generated(File/New).
2.2 GENERATING A JACK E T STRUCTURE Precede has the ability to generate jacket type structures automatically. Jackets with 1, 3, 4, 6 or 8 main legs may be automatically generated with or without grouted or nongrouted piles and up to three skirt piles at each corner leg. Conductors can also be generated automatically. The Jacket Wizard is invoked by selecting the File/New menu item then selecting the Jacket button from the New Structure wizard, see Section 3.1.
Specify the work point, top framing and mudline elevations, the leg batter, the distance between legs at the work point and the number of bays desired or the minimum angle between the leg and the diagonal braces. From this information, Precede will calculate the intermediate elevations and place the information in the appropriate fields in the Jacket Type Structure dialog. 2.2.1 Jacket Information Specify the number of legs and whether the legs have grouted, non-grouted or no piles. The work point (the elevation at which the legs become vertical), the pile connecting elevation (elevation at which the leg is shimmed to the pile), the mudline elevation and all intermediate elevations including those above the work point should be specified. Additional information relating to conductors, skirt piles and pile stubs may be specified on the Conductors and Skirt Piles tabs.
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Precede 2.2.2 Non-grouted Structures When legs are designated as ungrouted on the Jacket Type Structure dialog, Precede generates coincident leg and pile joints from the mudline, up to the pile connecting elevation and at all specified intermediate (entered in Other elevations on the Jacket Type Structure dialog) elevations between. By default, the leg joint is odd numbered and the coincident pile joint is numbered one greater than the leg joint (i.e. leg joint 101 is coincident with pile joint 102). Leg joints are also created at the pile connecting elevation and at any elevations specified above the pile connecting elevation. The program also creates the appropriate leg and pile members incident upon leg and pile joints respectively and connects coincident leg and pile joints with wishbone members. At the pile connecting elevation, only leg joints, which are shared by the leg and pile members are created. Pile joints at the mudline, or at the pile stub elevation if specified, are assigned pile head(PILEHD) fixities, see Section 5.13. 2.2.3 Grouted Structures When legs are designated as grouted on the Jacket Type Structure dialog, leg joints are generated from the mudline, upward, at all specified elevations and numbered according to the default numbering scheme. Pile joints, pile members and wishbone members are not created. Leg joints at the mudline, or at the pile stub elevation if specified, are assigned PILEHD fixities, see Section 5.13. 2.2.4 Pile Stubs A pile stub or pile extension elevation may be specified on the Jacket Type Structure dialog. The program will create pile extensions and assign PILEHD fixities to the joints at this elevation. Up to three skirt piles can be specified at the corner jacket legs on Jacket Type Structure dialog along with the top elevation of the skirt piles. The skirt pile leg and pile joints are generated assuming that the skirt pile type (grouted or non-grouted) is the same as the jacket main piles. The program will prompt for the skirt pile batter and spacing. 2.2.5 Conductors Up to three conductor well bays may be generated automatically by specifying information on the Conductors tab of the Jacket Type Structure dialog. The number of conductor rows in the global X direction and the global Y direction are entered for each well bay. The top conductor elevation and any elevations at which the conductors should not be connected to the structure are also specified. For each well bay, the spacing between conductors and the location of the well bay are specified on the Conductor Specification dialog.
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Precede will generate an odd numbered structure joint n, and a coincident conductor joint n+1 at all elevations that the conductor is connected to the structure. These joints are connected by a wishbone member. 2.2.6 Specifying Leg Data Upon selecting the Next button on the Jacket Type Structure dialog, Precede invokes the Column/Leg Specification dialog. The row labeling and leg numbers are entered on the Row and Legs tab.
The leg spacing at the work point elevation is entered on Spacing tab.
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Note: Leg numbers must be odd numbers from 1 to 99. Leg joints will be created at each elevation specified on the Jacket Specification Data screen in the form "eeLL" where ee represents the elevation number (usually with 1 being the lowest elevation) and LL is the leg number. For example: for a leg designated as leg number 3 for a structure with mudline elevation -100 and intermediate elevations at -65.0 and -10.0, leg joint numbers 103, 203 and 303 corresponding to elevations -100, -65 and -10 respectively, will be generated.
Based on this data, Precede will define face and plan elevation views accessible in the FACE and PLAN sub-menu items of the DISPLAY menu. A face is defined by a minimum of two main legs. An elevation is defined in the global XY plane at each elevation specified on the General tab of the Jacket Type Structure dialog. The batter of the each leg in the in the XZ and YZ planes is specified as a real number representing the rise/run of the leg in that plane. This information is entered on the Leg Batter tab of the Column/Leg Specification dialog.
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2.2.7 Parallel Bracing Layout Precede has the ability to determine the intermediate elevations of a jacket based on main diagonal brace angles or number of jacket bays. To utilize this feature select the Jacket button, select the Use parallel bracing option check box and select OK button. The Parallel Bracing Layout dialog is then invoked.
2.3 DEFAULT GROUP NAMES The following are the group names referenced by members generated automatically by the jacket generation facility: Group Name Piles
PLn
Conductors
CNn
Wishbones
W.B
Legs
LGn
Skirt piles
SKn
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Precede Note: For grouted leg structures, pile and wishbone members are not generated.
The automatic tubular sizing feature assigns member groups as follows: Group Name Group Name Horizontal members
Hmn
Diagonal members
Dmn
K-braces
Kpn
X-braces
Xqn
where n indicates the bay or elevation number beginning with 1-9 then continuing with A-Z. The variable m is 'A' for members in Rows 1, 2 and 3. The variable m for members in Rows A and B is 'B' for members between the legs of Rows 1 and 2, C for members B between the legs of Rows 2 and 3 and D for members between the legs of Rows 3 and 4.
2.4 UNDO AND REDO Precede has the ability to "undo" or "redo" program functions. The program saves the last 100 modeling functions (add, delete, modify, etc.) on a joint(s), member(s), plate(s), shell(s), group(s), section(s) and/or stiffener(s), etc. Selecting 'Undo' button on the “Standard” tool bar will negate the last function performed. Selecting 'Undo' again negates the function performed previous to the last one. Any function negated by the 'UNDO' feature may be redone selecting 'REDO' button on “Standard” tool bar. "Redo" may be selected to redo as many functions as has been previously negated. Note: The ’REDO’ feature is only available immediately after a feature(s) has been negated by ’UNDO’. Once another function besides ’UNDO’ or ’REDO’ has been performed "Redo" cannot be used.
2.5 EXITING THE MODELING SESSION Select the File/Exit menu option to exit the modeling session. If the model has been updated since it was last saved, an opportunity to save it will be provide.
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SECTION 3
FILE FEATURES
Precede
Precede 3.0 FILE FEATURES 3.1 NEW New is used to start a new model. This will invoke the New Structure Wizard dialog. If the current model has been modified since it was last saved, the program will query whether to save the model before it is closed.
3.2 OPEN Open is used to open an existing model, in the form of a restart file or a SACS input file, for editing. If the current model has been modified since it was last saved, the opportunity to save it is provided before the new model file is opened.
3.3 SAVE Save is used to save the current model as a SACS input file only. Any plots or model reports sent to file are also saved. Precede will overwrite the previous version of the file. Choose Save As from the File menu if the filename is to be changed or if the previous version of the file should not be overwritten.
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Precede 3.4 SAVE AS The Save As option on the File menu provides the ability to designate the filename to be saved.
3.5 SAVE NPF AS The Save NPF As option on the File menu provide the ability to designate the filename of the Neutral Picture File(NPF) file, see also Section 3.9.1.
3.6 SETTINGS The Setup option allows the default program display, file and model options to be overridden for the current modeling session. Note: The default program options may be modified using SACS Executive.
The default colors may be modified for the current modeling session on the Display Color dialog.
3.7 PLOT The Plot option allows the display of views to be sent directly to a print device. The list of defined print devices is specified from the Windows Control Panel. Refer to the Windows documentation for further explanation.
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Precede 3.7.1 Title This title will appear on the Screen plot only. The titles for all other plots are taken from the View ID, Face or Plan description. 3.7.2 Screen This feature plots the display window contents to the print device. 3.7.3 Full Set This feature plots all defined faces and plans and the isometric view of the entire structure to the current print device. 3.7.4 Faces This feature plots all defined face views to the print device. 3.7.5 Plans This feature plots all defined plan views to the print device. 3.7.6 Views This feature plots all defined views(plan, face and saved) to the print device. 3.7.7 Select Views This feature queries user to select which saved views to plot to the print device.
3.8 PAGE SETUP This option allows print settings such as margins, border and color to be specified.
3.9 EXPORT These options allow the user to export the active window to either the Windows clipboard, a Neutral Picture File(NPF), AutoCAD DXF(drawing exchange file), or a Windows Metafile format(WMF).
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Precede 3.9.1 Windows Clipboard This feature exports the active window to the Windows clipboard for pasting into other Windows based applications as a bitmap graphic. 3.9.2 Neutral Picture File This feature exports the active window to a temporary NPF file. The temporary NPF is appended each time this export option is used until the File/Save NPF As command is invoked. This allows the user to change views and export all these views to a single NPF. After the File/Save NPF As is invoked, subsequent uses of the Export/Neutral Picture File will be written to a new temporary NPF file. 3.9.3 DXF This feature exports the active window to a 2D AutoCAD DXF file. 3.9.4 Windows Metafile This feature exports the active window to a Windows Metafile.
3.10 EXIT This option is used to exit Precede. Precede prompts the user to save any updates to the model since the last save before exiting.
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SECTION 4
DISPLAY FEATURES
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Precede 4.0 DISPLAY FEATURES 4.1 ACTIVE/ISOMETRIC The Active/Isometric display feature displays all active joints, members, plates and shells in a three dimensional perspective view. If a display volume is set, then all active joints and elements within the specified volume are displayed.
4.2 FACE This feature allows the user to select the plane of a predefined face to be displayed. An out of plane tolerance may be entered. Note: Faces planes are generated automatically when the automatic jacket generation facility is used. Faces planes may also be generated using the Misc/Define Leg option, see Section 13.4.
4.3 PLAN This feature allows the user to select the plane of a predefined plan to be displayed. The desired plan is selected from the list box then the out of plane tolerance may be entered. Note: The plan planes are generated automatically when the automatic jacket generation facility is used. Plan may also be generated using the Misc/Define Leg option, see Section 13.4.
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Precede 4.4 PLANE The Plane display option activates the Display/Plane sub-menu allowing access to plane and volume display features. Planes or volumes containing joints that are located in the specified plane and/or volume and any active member or plate elements connected to the joints are shown, may be displayed. The plane display features allow for an out of plane tolerance to be specified. Note: Only member or plate elements that have all connecting joints shown are included on the display.
In addition to displaying volume contents, volume display features deactivate everything lying outside of the specified volume. Therefore, once a volume is activated, the Reset Volumes option must be used to display joints and elements lying outside of the volume(s) designated. The XY, XZ and YZ volume features may be used in conjunction with each other to define cubes that are to be displayed. 4.4.1 3 Joints This option will define a plane view may be defined by any three joints that are not aligned along a line. The first two joints picked define the line used as the horizontal display axis of the plane. The third joint picked is used to define plane to be displayed. Note: The plane is displayed such that the line defined by the first two joints is aligned horizontally and is displayed from left to right on the display.
4.4.2 XY Plane This option will display a global XY plane, defined by a global Z (vertical) coordinate. An out of plane tolerance may be specified. 4.4.3 XZ Plane This option will display a global XZ plane, defined by a global Y coordinate input. An out of plane tolerance may be specified. 4.4.4 YZ Plane This option will display a global YZ plane, defined by a global X coordinate input on the Data line. An out of plane tolerance may be specified. 4.4.5 XY Volume This option will display a volume defined between two global XY planes. The volume is defined by a minimum and maximum global Z coordinates and any XZ and/or YZ volumes already specified. 4.4.6 XZ Volume This option will display a volume defined between two global XZ planes. The volume is defined by a minimum and maximum global Y coordinates specified and any XY and/or YZ volumes already specified.
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Precede 4.4.7 YZ Volume This option will display a volume defined between two global YZ planes. The volume is defined by the minimum and maximum global X coordinates and any XY and/or XZ volumes already specified. 4.4.8 Reset Volumes This option resets the volume range coordinates to the default values of -∞ and ∞ for XY, XZ and YZ volumes.
4.5 SELECT The Select option allows the user to select display options and to include and/or exclude portions of the structure for display purposes.
The Display Options check boxes are used to designate whether or not disconnected joints (joints with no active members connected), members, member offsets, plates, plate offsets, and shell elements are to be displayed. The Joint Ranges frame allows up to 4 joint ranges to be defined. Joint numbers within the specified ranges may be designated to be either included or excluded from the display by selecting the Include or Exclude button, respectively. When the joint ranges are designated as Include(d), only joints within the specified ranges are active for display purposes. When the ranges are designated as Exclude(d), joints within the specified ranges are excluded for display purposes. Up to 20 member and/or plate groups may be specified to be included or excluded from the display. When groups are designated as Include(d), only elements that have all incident joints active and are assigned to one of the specified groups are considered active for display. When groups are designated as Exclude(d), all elements assigned to one of the specified groups are excluded from the display. The 'Member groups only' check box designates whether only member groups are to be included or excluded (checked), or member and plate groups are to be included or excluded (unchecked).
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Precede 4.6 RESET SELECT This option will reset all display settings set using the Display/Select option. All elements will be displayed.
4.7 LABELING The Display/Labeling features allow for joints, members, plates and/or shells to be labeled on the display. In general, label sub-menu items are toggles that turn the feature on or off. 4.7.1 Joints The Joints menu item accesses the joint information labeling features on the sub-menu. Joint labels include joint number, fixity or boundary condition, joint symbol and joint design setting. a. Number - The joint Number toggle alternately labels the corresponding joint number above each joint displayed or removes the joint number(s) from the display. b. Fixity - The fixity or boundary condition are alternately displayed or concealed using this toggle. The fixity is represented by a six character label corresponding to translation X, Y and Z and rotation X, Y and Z DOFs. c. Symbol - The joint symbol of each active joint is alternately shown or concealed. Joints with all degrees of freedom free (blank or zero) are represented with an 'X'. Joints with at least one restrained or fixed DOF are represented with a triangle and joints with a spring DOF are displayed as a square. Joints assigned an active retained or master DOF for dynamic analysis are displayed as inverted triangles (see Dynamic BC below). d. Design - This toggle displays or conceals the joint design option used by the automatic joint design feature, see Section 5.15.1. Joints designated to be excluded in the automatic design are labeled with an 'E' and joints specifically designated to be included are designated with an 'I' (see Sections 5.15.3 & 5.15.4). Joints not designated as either included or excluded are not labeled. e. Dynamic BC - This option allows the user to set which DOFs are to be considered active when showing dynamic boundary condition symbols. The user can select those degrees of freedom which are to be used in determining whether a joint is to be shown with the retained boundary condition symbol (inverted triangle). Setting the X On/Off toggle to 'On' indicates that any joint with the X translation degree of freedom retained (2) is to be displayed using the dynamic BC symbol. Similarly, setting the Y On/Off or the Z On/Off toggles to 'On' indicates that any joint with the Y or the Z translation DOF retained (2) is to be represented using the dynamic BC symbol. The XR On/Off, YR On/Off and the ZR On/Off toggles refer to the X, Y and Z rotational DOFs, respectively.
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4.7.2 Members Members menu item accesses the member information labeling toggles on the sub-menu. Members may be labeled showing only one of the following at one time: group label, section name, Fy, Ky or Ly, Kz or Lz, unbraced length of compression flange (Lb), local coordinate system, and orientation. a. Group Label - The property group label of all active members may be alternately displayed or concealed using this toggle. The positive direction of the local X axis points from the start joint to the end joint of the member. b. Section - The cross-section label, or diameter and thickness for tubular members, of each segment for active members may be alternately displayed or concealed using this toggle. c. Fy - The yield strength of each segment for active members may be alternately displayed or concealed using this toggle. d. Ky or Ly - The - This toggle alternately shows or conceals the value of Ky or Ly of all active members. e. Kz or Lz - This toggle alternately shows or conceals the value of Kz or Lz of all active members. f. Lb - The unbraced length of compression flange (Lb) for all active members may be alternately displayed or concealed using this toggle. Members with no Lb specified are labeled with the member length. g. Local CS - Active members may be labeled with an arrow pointing in the positive direction of the local X axis using this toggle. The positive direction of the local X axis points from the start joint to the end joint of the member. h. Orientation - The orientation of the cross section of each active member are drawn or concealed using the Orientation toggle. The orientation of the cross section is drawn as if standing at joint A of the member looking at joint B with your head in the direction of the positive local Z axis. The height and width of the cross section is drawn to scale, but thicknesses are not shown.
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Show Offsets - This toggle determines whether members are to be drawn showing the actual member length including offsets (checked) or drawn from start joint to end joint without offsets shown (unchecked).
4.7.3 Plates Plates may be shown with the plate property group, the plate name, and/or the Local coordinate system labeled. a. Group Label - Active plates may be alternately labeled or unlabeled with their corresponding group label. b. Name - The plate name of active plates may be alternately shown or concealed using the Name toggle. c. Local CS – The local coordinate system of each plate may be alternately shown or concealed using the Local CS toggle. d. Show offsets – The offset of each plate may be alternately shown or concealed using the Show offsets toggle. e. Show full size - This toggle allows plates to be shown in their actual size or reduced by 10%. The reduced mode allows for members connected to the same joints to be seen in addition to the plates. Note: The effects of plate group offsets are not shown when displaying plates.
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4.7.4 Shell Shells may be shown with the name and/or the local coordinate system labeled. a. Name – The shell name of the active shell may be alternately shown or concealed using the Name toggle. b. Local CS – The local coordinate system of each plate may be alternately shown or concealed using the Local CS toggle. c. Show full size - This toggle allows shells to be shown in their actual size or reduced by 10%. The reduced mode allows for members connected to the same joints to be seen in addition to the shells.
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4.7.5 Load The Display Load feature allow the user to display the members and/or joints where loading of the specified load condition is applied. The summation and center of force of the designated loading are reviewed after closing the Labeling dialog. Note: The load ID may contain the wild card character "*" in any character position.
a. Joint - This feature designates that all joints currently displayed that have loading applied in the specified load condition and load label are to be differentiated by highlighting in a different color (normally purple). If no load identification label is designated, then all loaded joints for the specified load condition will be highlighted. b. Member Concentrated - This option marks the location on each displayed member that a concentrated load is defined for the specified load condition and load identification label with an 'X'. If no specific load identification label is supplied, then all members that have concentrated loads defined in the specified load condition are marked. c. Member Distributed - The Member Distributed feature shows the portions of members that have distributed loading applied in the specified load condition and load label in a different color (normally purple). If no load identification label is designated, then loaded portions of members for the specified load condition are highlighted. d. Temperature - The Temperature feature highlights all members that have temperature load defined for the specified load condition and load identification label. If no specific load identification label is designated, all members loaded for the specified load condition are highlighted. The sum and center of force are not available for review.
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4.7.6 Special Special display features may be selected from the Special tab. a. Out of plane offsets - this toggle designates whether or not elements that are offset out of the joint plane are to be displayed in a different color. This option is only applicable when a plane is displayed on the screen. b. Members w/o properties - this toggle is used to designate whether or not elements not assigned to a property group are to be displayed in a different color. c. Through members - members designated as through members, X-brace members or K-brace members may be shown in a different color using this toggle. d. Dummy structure - members defined as part of a Dummy Structure or an Appurtenance Structure may be displayed in a different color using this toggle, see Section 10.1.11. e. None - all labeling specified above is removed/turned off. f. Show rows and elevations - this toggle alternately displays or conceals row and elevation labels. This label is only applicable for structures containing the row and plan definitions created automatically or using the Misc/Leg Define option, see Section 13.4.
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4.8 LOAD DIAGRAM This feature displays the loading diagram of a member or set of members for a specified load condition. After selecting the Load Diagram menu item, the member(s) to be diagramed is selected and the desired load condition is selected or entered. The local Y and Z axes load diagrams are displayed for the first member selected.
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Precede 4.9 ROTATE The Rotate features allow the active display to be rotated about the global X, Y, Z or screen axes. a. X axis - rotates the structural coordinate system about the global X axis by the angle specified. This feature is for display purposes only, actual joint and element locations remain unchanged. Y axis - rotates the structural coordinate system about the global Y axis by the angle specified. This feature is for display purposes only, actual joint and element locations remain unchanged. b. Z axis - rotates the structural coordinate system about the global Z axis by the angle specified. This feature is for display purposes only, actual joint and element locations remain unchanged. c. Screen - rotates the display by the specified angle about the line perpendicular to the screen. Actual joint and element locations remain unchanged.
4.10 2 LINE 2 Line displays the structural elements as 3D solids(excluding shells) and removes hidden lines.
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Precede 4.11 SHOW IN 3-D The 3-D toggle switches the display mode from a 2-D plane mode to a 3-D perspective mode, or vice versa, when a plane that has out of plane tolerance specified is active. The default mode when a plane is active is 2-D.
4.12 ZOOM BOX The Window features allow the user to zoom, delete joints, delete elements, delete beam elements, delete plate elements, renumber joints, translate/rotate/duplicate or design connection offsets of the portion of the structure enclosed in a rectangular window or box. After selecting the appropriate window feature from the sub-menu, one corner of the box is picked, then the diagonally opposite corner of the box is picked. Note: Once the first corner of the box is picked, a box is drawn from the first corner to the mouse arrow location. Do not hold down the mouse button after picking the first corner of the box.
4.12.1 Zoom Display This feature expands the area within the designated window so that it fills the entire display area. 4.12.2 Delete Joints All joints which lie inside the designated window are deleted along with all attached structural elements. Note: Corresponding joint and element loads will also be deleted, in addition to structural elements not displayed on the screen but connected to the joints.
4.12.3 Delete Elements All structural elements which lie within the window are deleted, in addition to the corresponding element loads. 4.12.4 Delete Members This function deletes all members which lie completely within the designated window, in addition to the corresponding member loads. 4.12.5 Delete Plates All plates, which lie completely within the designated window, in addition to any corresponding plate loads, are deleted using this function. 4.12.6 Increment Joints The joint numbers of all joints which lie inside the window are incremented by the amount specified. 4.12.7 Translate/Rotate All joints which lie inside the defined window are selected to be translated, rotated and/or duplicated. This feature inputs joints residing within the window into the Joints/Translate & Rotate option, see Section 5.10, instead of requiring the user to input joint ranges.
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Precede 4.12.7.1 General The rotation angle, axis about which to rotate, the X, Y and Z translations and/or X, Y and Z scale factors are specified on the Translate and Rotate dialog. If the existing joints are to duplicated, check the duplicate joints box, specify the number of duplications and whether existing elements are to be copied. Beam elements may be created between the original joint and its duplicate by checking the appropriate box on the Duplicate tab.
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4.12.7.2 Mirror Image The joints and attached structural elements may be mirrored across any of the 3 structural planes at a specified coordinate. The existing joints may be copied by checking the duplicate joints box and specifying the number of duplications and whether existing elements are to copied. Beam elements may be created between the original join and its duplicate by checking the appropriate box on the Duplicate tab. Note: Joints and elements lying in the structural plane are not duplicated.
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4.12.7.3 About a Line The joints and structural elements may be rotated or copied about a line defined by 2 joints. The existing joints may be copied by check the duplicate joints box and specifying the number of duplications and whether existing elements are to be copied. Beam elements may be created between the original joint and its duplicate by checking the appropriate box on the Duplicate tab. Note: The joints and structural elements lying on the line defined by the 2 joints are not duplicated.
4.12.8 Joint Design Joints which lie inside the defined window are selected to be designed using the Joints/Design/Auto option, see Section 5.15.1.
4.13 UNZOOM This option returns any zoomed display to its original unzoomed form.
4.14 VIEW The View display option activates the Display/View sub-menu.
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Precede 4.14.1 Select This option allows the user to display user defined views by selecting the View ID from the appropriate bin. 4.14.2 Save The Save option allows the user to save the active display into one of the six available bins. The user should select the desired bin in which to save the view from the Display/Save sub-menu. The user enters the View ID or name along with the optional View title. A maximum of thirty views per bin are allowed. View labeling will not be saved with the view. 4.14.3 Delete The Delete feature allows the user to delete a view defined in one of the bins. The view to be deleted is selected from the appropriate bin of the Display/View/Delete sub-menu. 4.14.4 Rename Bin The bin name may be changed using the Rename option by selecting the bin then specifying the new name.
4.15 CYLINDER 4.15.1 Flat This option will unroll the mesh such that all added elements will be added on the approximated structure surface generated by the mesh versus the actual structure as shown below. All joints selected MUST be on the circumference of the cylindrical mesh. 4.15.2 Round This option will unroll the mesh such that all added elements will be added on the structure surface generated by the mesh versus the approximated structure surface defined by the structural elements as shown below. All joints selected MUST be on the circumference of the cylindrical mesh.
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Precede 4.16 DIMENSIONS 4.16.1 Add This option adds a dimension label based on the settings the Dimension Settings dialog. 4.16.2 Edit This option edits the style, text, and/or location of an existing detail feature. 4.16.3 Delete This feature allows the user to delete any of the dimensions previously defined on the current display. This is done by pointing the arrow to the dimension to be deleted and pressing the select switch. The dimension that is selected will then change colors. If it is the dimension to be deleted, press the perform switch and the dimension will disappear from the display. 4.16.4 Settings
4.16.4.1 Text 4.16.4.1.1 Distance This option uses the distance as the label text. 4.16.4.1.2 User label This option prompts the user to enter a custom label as the label text. 4.16.4.1.3 Axis System This option positions a global coordinate axis system on the drawing. 4.16.4.1.4 None This option does not use any label text. 4.16.4.2 Direction 4.16.4.2.1 True This option draws the true dimension between any 2 joints/points in the active window. The dimensioning line will be parallel to the line between the two joints/points. If the previously defined location of the arrow tip is to be used instead, the Apply button is selected. A maximum of 100 dimensions may be placed on any one view. 4.16.4.2.2 Vertical
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Precede This option draws a vertical dimension between any 2 joints/points on the current display. The dimensioning line will be vertical relative to the screen. If the previously defined location of the arrow tip is to be used instead, the Apply button is selected. A maximum of 100 dimensions may be placed on any one view. 4.16.4.2.3 Horizontal This option draws a horizontal dimension between any 2 joints/points in the active window. The dimensioning line will be horizontal relative to the screen. If the previously defined location of the arrow tip is to be used instead, the Apply button is selected. A maximum of 100 dimensions may be placed on any one view. 4.16.4.3 Measure 4.16.4.3.1 Joints This option draws any dimension (true, vertical or horizontal) between any 2 joints in the active window. 4.16.4.3.2 Points This option draws any dimension (true, vertical or horizontal) between either any 2 points in the active window. 4.16.4.4 Line type 4.16.4.4.1 Straight This option draws any dimension line (true, vertical or horizontal) as either a straight line. Only the straight line can have text dimensioning included with it. 4.16.4.4.2 Curve Up This option draws any dimension line (true, vertical or horizontal) as a curved line whose arc is upward. Only the straight line can have text dimensioning included with it. 4.16.4.4.3 Curve Down This option draws any dimension line (true, vertical or horizontal) as a curved line whose arc is downward. Only the straight line can have text dimensioning included with it. 4.16.4.4.4 S Curve This option draws any dimension line (true, vertical or horizontal) as an S curved line. Only the straight line can have text dimensioning included with it. 4.16.4.4.5 None This option allows the user to draw any dimension (true, vertical or horizontal) between any 2 joints/points on the current display either with (On) or without (Off) the line below the dimension being drawn. 4.16.4.5 Arrowhead 4.16.4.5.1 Both ends
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Precede This option draws the dimensioning line for any dimension (true, vertical or horizontal) with arrows at each end of the dimensioning line. 4.16.4.5.2 To end This option draws the dimensioning line for any dimension (true, vertical or horizontal) with only 1 arrow at the end of the dimensioning line. In this case where there is 1 arrow, it will appear at the second joint/point selected. 4.16.4.5.3 None This option draws the dimensioning line for any dimension (true, vertical or horizontal) with no arrows at the ends of the dimensioning line.
4.17 SACS 3D 4.17.1 3D Solid This option offers enhanced 3D rendering abilities. The rendered model may be manipulated for plotting and exporting purposes. The rendered model may be exported to the Windows Clipboard, DXF and Windows Metafile. 4.17.1.1 File Refer to Section 3.0 for complete documentation of these features. 4.17.1.2 Display Refer to Section 4.0 for complete documentation of these features.
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SECTION 5
JOINT FEATURES
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Precede 5.0 JOINT FEATURES 5.1 DETAILS/MODIFY A joint’s coordinates and/or fixity may be displayed and/or modified with this option. Once a joint is selected, the values are displayed in the dialog and may be modified by entering a new value. The joint is updated by clicking the Apply button.
5.2 FIND Joints may be located by using this feature. Enter the joint number to be located and Precede will highlight the joint in red on the model and the joint’s properties will be displayed.
5.3 DISTANCE Distance between joints may be determined by using this feature. Select or enter two joints. The data returned is actual distance, and the differences of the joints’ X, Y, and Z coordinates.
5.4 ADD Joints may be added by selecting one of the five sub-menu options of the Joints/Add option. The five options are absolute coordinates, relative to a joint, intersection of two lines, relative to a line, and dividing a line. 5.4.1 Absolute This option allows a joint to be added by typing the global coordinates of the joint. The default joint number displayed in the joint number field may be overridden. The joint fixity may also be specified. 5.4.2 Relative The Relative option is used to add a joint at a specified distance from an existing joint. The reference joint is selected, then the distances along the global X, Y and Z axes from the reference joint to the new joint are specified along with the joint fixity. 5.4.3 Intersection A joint may be defined at the intersection of two lines defined by four existing joints. First the two joints defining the first line are selected, and then the two joints defining the second line are selected. The joint number to be created is displayed and may be modified. Note: If a member exists along the line defined by the first and second or by the third and forth joints selected, the member will be divided into two members each incident upon the newly created joint.
5.4.4 Relative to a Line This option is used to add a joint along or relative to a base line defined by two joints (A and B). The joint position may be defined by a length along the base line, by the X, Y or
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Precede Z global coordinate intersection on the base line or by defining an angle off of the base line. 5.4.4.1 Length A new joint will added along the base line at a specified length from the first joint (joint A) defining the base line. If the length is positive, then the new joint is added between joints A and B, if it is negative the new joint will be away from joint B. 5.4.4.2 X-coordinate A joint will be added where the Base Line intersects the specified global X coordinate. 5.4.4.3 Y-coordinate A joint will be added where the Base Line intersects the specified global Y coordinate. 5.4.4.4 Z-coordinate A joint will be added where the Base Line intersects the specified global Z coordinate. 5.4.4.5 Angle A joint will be added a specified distance along a line intersecting the Base Line. After defining the Base line, the angle between the base line and the intersecting line is specified. The distance from Base Line joint A along the Base Line to the point at which the Intersect line intersects the Base line is entered in the Base field. The joint is added along the intersect line the distance specified in the Intersect field. This feature is not available when the model is shown in Active/Isometric view. 5.4.5 Divide a Line Equally spaced joints may be added along a line defined by two joints using this option. The two joints defining the line are selected, then the number of joints to be added and the joint number of the first joint maybe specified as well as the joint fixities.
5.5 GRID This option creates a grid of joints in either the global XY, XZ or YZ planes. The grid plane is located by specifying the coordinate along the axis normal to the specified plane. Automatic or user defined joint numbering may be chosen. User defined joint numbering requires the starting joint number, and the numbering increments along the two axes of the grid plane. If a new joint location coincides with an existing joint, the existing joint may be used optionally. Members between specified grid points may be created parallel to the axes of the grid plane. The default group labels and offsets normal to the plane may be specified separately for members creating along each of the axes defining the plane. If member groups specified already have properties defined, the automatic top flush option may be selected. Members will be assigned offsets so that the top or bottom of all beam elements that are created are at a specified distance from the joint plane. Plate elements may also be created in the grid plane. Out of plane offsets, default group label and starting plate name may also be specified.
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Precede Up to 16 grid points along each of the axes defining the grid plane may be designated. The default member group labels specified on the Joint Grid data dialog are designated as the default group label for each grid coordinate. The group label for any grid coordinate may be modified in the group labels box. For example, if the -10.0 is specified as the third X direction grid coordinate, all members created at X=-10.0 may be assigned to group 'W05' by specifying 'W05' in the third group field for X direction grid points.
5.6 MESH A mesh of joints may be created using rectangular, cylindrical or spherical coordinate systems. The joint mesh may be connected with member and/or plate elements automatically. 5.6.1 Rectangular This option creates joint mesh defined using the global X, Y and Z coordinate system. The mesh origin, number of joints in each direction and the step sequence (incrementing order) used must be specified. The sequence specified designates in which order joints will be created. For example, "X then Y then Z" creates joints along the X-axis, then along the Y-axis then along the Z-axis. "XY then Z" creates joints along a line in the XY
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Precede plane then along the Z-axis. Joints may be numbered automatically or the numbering sequence may be user defined.
The mesh may be connected with member and/or plate elements created in the plane defined by the first and second steps of the sequence. For example, for "X then Y then Z", elements are created in the XY plane. For "XY then Z", elements are created in the plane defined by the line in the XY plane and the Z axis 5.6.2 Cylindrical This option generates a joint mesh defined by a cylindrical coordinate system. The global coordinates of the cylindrical coordinate system origin and the global axis to which the cylinder axis is parallel must be specified. The number of joints to be generated about the cylinder axis, the starting theta angle and the angle increment are required in addition to the initial or begin radius, number of joints along the radius and radii increment. The number of joint levels along the axis and the spacing between levels are also required. The shape of the mesh is determined by the incrementing sequence or order. The mesh may be connected with member and/or plate elements. Elements are created in the plane of the first two steps of the sequence. For example, cylinders are created by specifying sequence "T,L,R", elements are connected between theta joints and joint levels. Platters are generated by selecting sequence "T,R,L", elements are created between theta joints and radii joints.
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5.6.3 Spherical This option generates a joint mesh defined by a spherical coordinate system. The global coordinates of the spherical coordinate system origin must be specified. The number of joints to be generated about the global Z axis, the starting theta angle and the angle increment are required in addition to the initial or begin radius, number of joints along the radius and radii increment. The number of joints about the global XY plane, the angle increment and starting angle are also required. The shape of the mesh is determined by the sequence or order of incrementing specified. The mesh may be connected with member and/or plate elements. Elements are created in the plane of the first two steps of the sequence.
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5.7 MOVE A joint may be relocated by defining its new location by absolute coordinates, relative to another joint, at the intersection between two lines or relative to a line, see Section 5.4.
5.8 RENAME This feature will rename a joint number to a new or existing joint number. This feature has the ability to move all elements from the existing joint to the new joint number.
5.9 REORDER The Reorder option provides the ability to reorder joint numbers in a volume(s) designated by the user. The start and end elevations of the volume(s) are specified along the first joint number to be used in that volume and the joint numbering increment. Joints are reordered based on the sort plane designated. For a particular elevation, joints are reordered along the first axis of the sort plane, then along the second axis. The procedure is repeated for each elevation. For example, for sort plane XY, the start and end Z axis elevations must be specified.
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Precede Existing joint numbering information (minimum and maximum joint number, and number of joints) may be displayed by selecting the Review button. Note: Joints may not be reordered using joint numbers that are already in use. For example, joints 101-130 may not be reordered as joints 121-150.
5.10 TRANSLATE/ROTATE A set of joints may be moved, copied and/or scaled by selecting one of the translate/rotate options on the sub-menu then specifying up to eight ranges on the Joint Selection dialog. Note: To translate and/or rotate the user defined views, a joint range of 1 to 9999 must be specified.
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5.10.1 General The rotation angle, axis about which to rotate, the X, Y and Z translations and/or X, Y and Z scale factors are specified on the Joint Translation and Rotation dialog. If the existing joints are to be duplicated, check the duplicate joints box, specify the number of duplications and whether existing elements are to be copied. Beam elements may be created between the original joint and its duplicate by checking the appropriate box. 5.10.2 Mirror Image The joints and attached structural elements may be mirrored across any of the 3 structural planes at a specified coordinate. The existing joints may be copied by checking the duplicate joints box and specifying the number of duplications and whether existing elements are to be copied. Beam elements may be created between the original joint and its duplicate by checking the appropriate box Note: Joints and elements lying in the structural plane are not duplicated.
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5.10.3 About a Line The joints and structural elements may be rotated or copied about a line defined by 2 joints. The existing joints may be copied by checking the duplicate joints box and specifying the number of duplications and whether existing elements are to be copied. Beam elements may be created between the original joint and its duplicate by checking the appropriate box. Note: The joints and structural elements lying on the line defined by the 2 joints are not duplicated.
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5.11 DELETE This option is used to delete one or more joints by selecting the joints then picking the perform button. The user will be prompted on the Data Line whether to delete joints if structural elements are connected. By default, any joint having structural elements connected are not deleted. Enter 'YES' to have the joints and any connected structural elements deleted. A joint number to be deleted may be entered manually by "tabbing" to the Joint field after the "Delete attached structural elements" field and specifying the joint number. Note: If the higher numbered of two coincident joints is to be deleted, double click on the joint so that the desired joint number is displayed. All previously selected joints will be deselected.
5.12 DELETE MANY This command deletes active joints and attached elements by any of the following methods: joint ranges, negative side of a plane or between two planes. Any combination or all of these methods may be used at one time. When deleting by joint ranges, a maximum of four joint ranges may be specified. Any active joint which fits into any specified range is deleted.
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Precede If one plane is specified, all active joints on the negative side of a plane are deleted. The plane is defined by 3 joints with the local X axis defined from joint 1 to joint 2, the local Y axis is in the direction of joint 3 and the local Z axis formed by the right hand rule. Joints in the local negative Z quadrant are deleted. The user may optionally delete joints lying in the plane.
The third method is to delete joints lying between two parallel planes. The first plane is defined by 3 joints with the local coordinate system described above. The second plane is parallel to the first plane. The distance between the two planes is specified in terms of the local Z axis of the first plane. This distance may be either positive or negative. All active joints lying between the planes will be deleted. The user may optionally delete joints lying in either plane.
5.13 FIXITIES This option is used to assign joint fixities to a joint or set of joints. The fixities is entered in the fixity field on the Data line then the appropriate joints are selected with the mouse. The fixities are assigned by pressing the perform mouse button or the Enter key. The joint fixity field is six characters long representing translation X, Y and Z and rotational X, Y and Z degrees of freedom. The fixity for a particular DOF may be specified as '0', '1' or '2' corresponding to free, fixed or dynamic retained, respectively. A fixity of 'FIXED', 'PINNED' or 'PILEHD' may be specified for fixed, pinned or pilehead supports respectively. Note: Joint fixities may be displayed and modified using the Display/Modify option also.
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Precede 5.14 SPRINGS This option allows the specification of translation and rotational spring rates for the selected joints. Spring rates may be assigned only to degrees of freedom designated as fixed to ground. A blank or zero spring rate corresponds to fixed or rigid degree of freedom.
5.15 DESIGN This option calculates the offsets for tubular joint connections based on input specified by the user. 5.15.1 Automatic This option provides the capability to automatically generate brace member offsets so that the brace member ends are modeled to the face of the chord and/or have a specified gap between the braces. Braces may be moved along the centerline of the chord, around the circumference of the chord or a combination of both to achieve the desired gap. Chord outside diameters may be increased to achieve a circumferential gap and to insure that the longitudinal eccentricities do not exceed one fourth the chord diameter. Joint can segment lengths of non-prismatic groups may be updated to meet API requirements and rounded to the nearest standard length specified. Joints to be redesigned may designated as all joints, joints active on the screen or all joints not designated in the automatic design Exclude List by selecting All, Screen or Included, respectively. Joints to be redesigned may also be designated using Display/Zoom Box/Joint Design option, see Section 4.10.8. Note: The location of X and K-brace center joints are recalculated based on the new member offsets. Also the location of joints generated by dividing an existing member will be recalculated based on the new offsets.
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5.15.2 Manual This option provides the ability to design a connection manually by specifying brace movements and connection details. Gap details may be specified along the chord axis and/or around the circumference of the chord. After selecting the joint to be designed, the chord of the joint is unrolled and the brace footprints are drawn on the unrolled chord. The joint number at the opposite end of each brace is labeled inside the footprint. A separate set of menus are displayed for manual joint design. Note: Gaps are displayed at the face of the chord regardless of whether the brace is indeed offset to the chord face. Offsets defined in member local coordinates are converted to global coordinate offsets.
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5.15.2.1 File 5.15.2.1.1 Plot A hardcopy plot of the footprints may be obtained by selecting this function. Refer to Section 3.7.2 for complete details. 5.15.2.1.2 Page Setup Refer to Section 3.8 for complete details 5.15.2.1.3 Close This feature will end the manual design session for this joint. 5.15.2.2 Display 5.15.2.2.1 Details The shortest distance between the wall of the reference brace and each of the other brace walls are displayed in the brace footprints by this option. The reference brace is designated by selecting the footprint with the mouse. The offsets along the centerline and around the circumference (off the centerline) of the reference brace are displayed. 5.15.2.2.2 Roll Chord The chord may be rotated for display purposes by an angle specified in degrees. 5.15.2.2.3 Remove Brace
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Precede Brace footprints may be removed from the display by selecting this option. Removing the footprint from the display does not affect the brace member. 5.15.2.3 Modify Offsets 5.15.2.3.1 Initialize All offsets at the displayed end of the braces are initialized to zero. 5.15.2.3.2 Set Gap Longitudinally The gap between two braces along the centerline of the chord may be specified by selecting the footprint of the brace to move, then selecting the footprint of the stationary brace, then specifying the gap. 5.15.2.3.3 Set Gap Radially The gap between two braces measured around the circumference of the chord may be specified by selecting the footprint of the brace to move, then selecting the footprint of the stationary brace, then specifying the gap. 5.15.2.3.4 Offset to Outside of Chord This option is a toggle. Braces ends modeled to the joint may be offset to the face of the chord or brace ends offset to the chord face may be reset back to the joint by selecting this option. The flag is displayed as part of the menu item 'Offset Outside Chord'. This option effects all braces that have not been removed from the display. 5.15.2.3.5 Save Offsets This option saves all offsets created by brace movements specified during the manual design in the global coordinate system. The joint number is added to the automatic joint design Exclude list, see Section 5.15.4. 5.15.3 Include Joint This option allows the user remove a joint from the Exclude list so that it will be included when the Include joint selection option in the automatic joint design feature is selected. A maximum of 50 joints may selected to be removed from the Exclude list at one time. Joints that lie along a pile and joints which are part of the dummy structure definition are always excluded and may not be removed from the Exclude list. 5.15.4 Exclude Joint By default, manually designed joints, pile joints and joints defined as delete joints of a dummy structure, see Section 10.1.11, are excluded from the automatic design process. Additional joints may be added to the Exclude list for automatic joint design, see Section 5.15.1, using this option. A maximum of 50 joints may be excluded at any one time. Joints designated as excluded from automatic joint design may be labeled by selecting the Display/Labeling/Joints/Design option. 5.15.5 Reset the List This option removes all joints from the automatic joint design Exclude list, see Section 5.15.4.
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SECTION 6
MEMBER FEATURES
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Precede 6.0 MEMBER FEATURE S 6.1 DETAILS/MODIFY The Detail/Modify option allows the user to display and/or modify member data for the selected member. The data for the last member selected is displayed on the command line. The member group, Ky, Kz, member release at the start joint (Arel), member release at the end joint (Brel), unbraced length of compression flange (Lb) and Orientation angle, may be modified or specified.
6.2 OFFSETS The Offset option allows the user to display or modify the offsets assigned to a member or group of members. When more than one member is selected, only the offsets that are common to all selected members are displayed. Offsets may be modified. Only fields in which data has been entered will be updated. A maximum of 50 members may be selected at any one time and a member may be deselected by reselecting it. Offsets specified are defined as global offsets by selecting the offset type. Offsets may be deleted by setting the offset type to none. The next three fields correspond to X, Y and Z offsets of joint A. The last three fields correspond to the X, Y and Z offsets of joint B.
6.3 FIND Members may be located by using this feature. Enter the member to be located and Precede will highlight the member in red on the model and the member’s properties will be displayed.
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Precede 6.4 ADD Beam elements or members may be added by first selecting the start joint, then selecting the end joint to which the member is to be connected. The default member group may be entered in the appropriate field before selecting the joints. Upon selecting a joint, the joint number is displayed and may be changed by typing the desired joint number. Note: If the member to be added already exists, or if the same joint is selected as the start and the end joint, no member will be created. Two members may be added between the same two joints by choosing the joints in opposite order.
6.5 STRING A string of members or a set of continually connected members may be added using the String option. The default group name may be specified before selecting the joints to which the members are connected. The beginning joint of the first member of the string is selected first, then the end joint of the first member. For each successive member, only the end joint should be selected. The begining joint is assumed to be the end joint of the previous member. Note: Joints that are clicked twice with the mouse are removed from the string sequence. For a closed loop of members the ’End’ joint(which is physically the same joint as the ’Start’ joint) of the loop must manually entered as the last joint in the sequence.
6.6 X-BRACE An X-brace made up of 4 members and a center joint may be defined using the X-Brace option. The lower left, upper right, upper left and lower right joints are selected. The order in which the joints are selected is important and must be such that the lines between the first two and last two joints intersect. The center joint number may be altered to any number not used. The default group label for members created may be specified prior to selecting the Apply button. Note: If a member exists between the first and second joints or between the third and forth joints selected, that member will be divided at the center joint location.
6.7 K-BRACE A K-brace made up of four members and a joint may be defined using this option. The first two joints selected define the end joints of the chord members. The third and fourth joints define the perimeter joints of the braces. The chord joint number may be altered to any unused number. The default group label of the members to be created may be specified before selecting the first joint of the K-brace. Note: If a chord member already exists, it will be divided into two members connected at the center joint
6.8 WISHBONE This feature creates a wishbone element between two coincident joints. To create a wishbone: Select or enter one of the coincident joints to which the wishbone is attached.
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Precede Select or enter the reference joint used to determine the direction of the wishbone element. If the direction of the wishbone element is to be the average between two joints, select or enter the second reference joint Optionally enter the group to which the wishbone is to be assigned. Note: This feature requires the existence of two joints that occupy the same x, y, and z coordinates.
6.9 DIVIDE A member may be divided into two or more members using the Divide option. One member at a time may be divided by selecting the dividing technique from the sub-menu, the member to be divided, then specifying the new joint number and any appropriate information. The following divide techniques are available: Ratio, Length, XY Plane, XZ Plane, YZ Plane and equal Parts. Additional members to be divided may be selected, one element at a time. 6.9.1 Ratio After selecting the Ratio option and picking the member to be divided, the joint number to be created and the divide ratio are specified. By default, the selected member will be divided at the specified ratio of the total length from the beginning of the member or start joint toward the member end. A negative ratio indicates that the member is to be divided at the specified ratio from the end of the member or end joint back toward the member start joint. 6.9.2 Length Members may be divided at a specific distance along the member length using this option. After selecting the member to be divided, the joint number to be created and the distance along the member at which to divide the member are specified. By default, the member is divided at the specified distance measured from the member beginning or start joint toward the member end. A negative length indicates that the distance is to be measured from the end of the member or the end joint back toward the member start joint. 6.9.3 XY Plane A member may be divided at the point at which it intersects the XY structural plane defined by the Z coordinate specified. The number of the joint to be created may also be specified. 6.9.4 XZ Plane A member may be divided at the point at which it intersects the XZ structural plane defined by the Y coordinate specified. The number of the joint to be created may also be specified.
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Precede 6.9.5 YZ Plane A member may be divided at the point at which it intersects the YZ structural plane defined by the X coordinate specified. The number of the joint to be created may also be specified. 6.9.6 Equal Parts A member may be divided into 2 to 99 equal parts by picking this option, the member and by specifying the number of parts and optionally the new joint number. 6.9.7 Perpendicular A member may be divided at the point at which a line perpendicular to the member passes through a joint not on the member. 6.9.8 On Member This is a toggle that specifies where the new joint is to be placed when dividing a member containing offsets. If the toggle is set to On Line, new joints are created on a straight line through the original end joints of the member selected. Offsets are added to the new members at the new joint end so that the members remain collinear. Divide ratios and/or lengths are measured from the joint. If the toggle is set to On Member, new joints are created on the offset member. Divide ratios and/or lengths are measured from the member end instead of from the joint.
6.10 DELETE Members may be deleted using the Delete option. Up to 50 members may be deleted at one time. A selected member may be deselected by reselecting it. Note: Although deleting a member does not delete the corresponding member loads, extraneous loads may be deleted using the Misc/Check Model feature.
6.11 DEFINE DEFAULTS The Default option allows the user to define default member data for all new members that are added, groups specified or selected members using the "Set To Default" option. The default member data that may be defined includes: member offsets, stress calculation option, end releases, orientation angle, local Z axis reference joint, flood condition, average joint thickness, effective length factors, unbraced length or shear modulus, density, post-processing segment option and effective diameter for added mass. The specified member defaults can be assigned to member groups be specifying the group names in the member group fields and selecting the "Apply to designated groups" option. Defined defaults are assigned to new members if the "Use defaults when adding new members" option is selected. The specified defaults may also be applied to existing members by selecting the Set To Default option then selecting the appropriate members.
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Precede 6.12 SET TO DEFAULT This option allows the user to set the member data for selected members to the currently defined default member data. A maximum of 50 members may be selected at one time. Any selected member may be deselected by selecting it again.
6.13 DEFINE AS This feature allows for existing members to be defined as X-braces, K-braces or through members. It is important that X-braces, K-braces or through members be defined for Joint/Design(features where only one joint of the brace may be relocated), etc. to work properly. 6.13.1 X-brace This option allows the user to define existing members and the common joint as an Xbrace by selecting the four corner joints of the X-brace. If the X-brace can be defined, a message indicating the center joint will be displayed. 6.13.2 K-brace This option allows the user to define existing members and a common joint on one side as a K-brace by selecting the four corner joints of the K-brace. If the K-brace can be defined, the center joint will be indicated on the Command line. 6.13.3 Through On Line This feature allows the user to define a set of connected members as collinear by selecting the individual members that make up the collinear through member. Intermediate joints located along the collinear members are moved so that they lie on the line between the begin end of the first through member and the end of the last through member selected. The collinear members are also designated as the through member for joint design. 6.13.4 Through Off Line This option allows the user to define a set of connected members as collinear by selecting the individual members that make up the collinear through member. Intermediate joints located along the collinear members are moved so that they lie on the line between the beginning joint of the first through member and the end joint of the last through member selected. If the end members have offsets, member offsets are created at the internal or intermediate joints such that the members are collinear and lie on a lie between the begin end of the first through member and the end of the last through member selected.
6.14 DUPLICATE/MIRROR The Duplicate option allows for the duplication of faces and plans defined in the model. This option is only valid if the structure was modeled using the automatic jacket generation facility or if the leg definitions were defined using the Misc/Define Leg option.
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Precede 6.14.1 Duplicate Face This option allows a face to be duplicated to another defined face. The user must select the pattern face name from the sub-menu then select the resultant face name on the sub menu. All members, except for piles, legs and wishbones, lying in the plane of the pattern face will be duplicated on the resultant face. Joints that are defined in the pattern face but not in the resultant face will be generated in the resultant face. 6.14.2 Duplicate Plan This option allows a plan to be duplicated to another defined plan. The user must select the pattern plan name from the sub-menu then select the resultant plan name on the sub menu. All members, except for piles, legs and wishbones, lying in the pattern plan will be duplicated on the resultant plan. Joints that are defined in the pattern plan but not in the resultant plan will be generated in the resultant plan. 6.14.3 Mirror Face The Mirror option allows faces defined in the model to be mirrored onto other defined faces. This option is only valid if the structure was modeled using the automatic jacket generation facility or if the leg definitions were defined using the Misc/Define Leg option. The user must select the pattern face name from the sub-menu then select the resultant face name on the sub menu. All members, except for piles, legs and wishbones, lying in the plane of the pattern face will be duplicated on the resultant face. Joints that are defined in the pattern face but not in the resultant face will be generated in the resultant face.
6.15 MESH TUBULAR This feature creates a finite element mesh of a tubular member. Enter the joint number to be assigned to the first new joint--optional. Select the member or enter the start and end joints. Enter the plate name to be assigned to the first new plate--optional. Enter the number of joints to be created around the circumference of the tubular. Click Apply to execute or Close to cancel.
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SECTION 7
PLATE FEATURES
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Precede 7.0 PLATE FEATURES 7.1 DETAILS/MODIFY Information for individual plates including the plate name, the plate group to which it is assigned and the connecting joints may be displayed using this option
7.2 OFFSETS 7.3 FIND Plates may be located by using this feature. Enter the plate to be located and Precede will highlight the plate in red on the model and the plate’s properties will be displayed.
7.4 ADD TRIANGULAR Triangular plates defined by three joints may be added using this feature. After the three joints defining the plate perimeter are selected, then plate name and plate property groups are specified. The first two joints selected define the plate local X axis, the local Y axis is defined as perpendicular to the local X towards the third joint. The right hand rule is used to determine the local Z axis. Note: If the plate name specified is already used, the plate will not be added.
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7.5 ADD QUADRILATERA L Quadrilateral plates defined by four joints may be added using this option. After the four joints defining the plate perimeter are selected, plate name and plate property group are specified. The first two joints selected define the plate local X axis, the local Y axis is defined as perpendicular to the local X towards the third joint. The right hand rule is used to determine the local Z axis. Note: If the plate name specified is already used, the plate will not be added.
7.6 RENAME This feature will rename a plate to a new plate name. If the new plate name exists the original plate will not be renamed.
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Precede 7.7 DIVIDE This feature will divide a plate by creating a set of triangular plate with a common joint at the centroid of the original plate.
7.8 DELETE One or more plates may be deleted by selecting the Delete option then selecting the plates to be deleted.
7.9 DEFINE DEFAULTS This option allows the user to define default plate data to be optionally assigned to new plates added or assigned to plates selected when using the Set To Default option. Plate data that may be defined, includes: offset type, offsets at each corner, reverse z-axis orientation and stress report option. The "Use defaults for new plates" box should be picked to have the default data applied to subsequently defined plates.
7.10 SET TO DEFAULT The Set To Default feature applies the default plate properties currently defined to the plates selected.
7.11 LOCAL Z UP This option allows the user to modify all plates that appear in the current display so that their local Z axis is pointed upward, out of the screen for two dimensional planes. This is done by interchanging joints A and B, along with their associated offsets, for plates whose local Z axis is pointed downward.
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Precede 7.12 LOCAL Z DOWN This option allows the user to modify all plates that appear in the current display so that their local Z axis is pointed downward, into the screen for two dimensional planes. This is done by interchanging joints A and B, along with their associated offsets, for plates whose local Z axis is pointed upward.
7.13 SHELL ELEMENT This option allows the user to add, delete, change and display shell element data. The shell elements may have 6, 8 or 9 joints and may be offset at any joint. Offsets are defined in the global structural coordinate system. The thickness of the shell element may be constant or may be defined at each joint.
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SECTION 8
PROPERTY FEATURES
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Precede 8.0 PROPERTY FEATURES 8.1 MEMBER GROUP The Member Group option allows the user to add, modify or delete member property group data.
Member group data including section label or outside diameter and wall thickness, Modulus of Elasticity, Shear Modulus, yield strength, density, segment length (for nonprismatic groups only), Ky and Kz, unbraced length (for wide-flanges) and flood condition may be specified. The properties of a previously defined group may be copied.
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Additional group data including plate/box girder web yield, stiffener spacing, post processing class, redesign option and joint thickness may be specified.
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Precede Segmentation for non-prismatic groups may be created or added by picking the AddSeg button. A new member group dialog will be displayed so that the properties of the new segment may be specified.
8.2 MEMBER SECTION The Member Section option may be used to add, delete or edit section property definitions by designating the section name then selecting the appropriate operation and section type. Section types supported include tubular, wide flange, rectangular box, general prismatic shape, tee, channel, angle, cone, concentric tubular, plate girders, stiffened cylinders and boxes.
In addition to section dimensions, optional section property data may be specified on the Section Property dialog. Section properties may be copied from defined sections by entering the like section in the Copy field then picking the Copy button. The concentric tubular cross-section type is used for grouted members consisting of a tube inside another tube. Additional stiffened cylinder stiffener data may be specified. Box stiffener data is specified on the Box Stiffener dialog.
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8.3 PLATE GROUP The Plate Group option allows the user to add, delete or edit plate group data for the group specified in the group label field by selecting the appropriate operation.
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Plate group data including thickness, plate type, Modulus of Elasticity, Poisson's ratio, yield strength, automatic neutral axis offset, local Z offset, density and stiffener data are specified on the Plate Group data dialog. Plate group data may be copied from a previously defined plate group by entering the group to be copied in the copy group field then selecting the Copy button.
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8.4 PLATE STIFFENER SE C TION This option allows the user to add, delete or edit plate stiffener data for special plate stiffener cross-sections. The plate stiffener section label should be specified in the Section label field and the appropriate operation should be selected. Plate stiffener data including the stiffener type and stiffener dimensions are specified on the Plate stiffener section dialog. Properties may be copied from a currently defined stiffener section by entering the section label of the section to be copied, then picking the Copy button. The cross section details required are dependent upon the section type as follows. An I beam or tee section requires flange width and thickness, and web depth and thickness. A box or hat section requires top and bottom widths and thickness, and height and thickness. A channel requires height, width, and web and flange thickness and an angle requires top and bottom width and thickness and web depth and thickness.
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8.5 K FACTOR The K-factor option may be used to calculate K-factors for members. Note: If effective lengths have been set for a member, then setting K factors for the same member will over-ride the effective lengths for that member and vice versa.
8.5.1 Ky & Kz This option determines effective K factors about both the local Y and Z axes based on the reference length defined by two joints selected by the user. The user selects two joints that define the reference buckling length to be used to calculate effective Ky and Kz. The member or members which the effective K-factors are to be determined are then selected. The reference length and the K-factors displayed may be modified. The effective K-factors are calculated as follows:
Keff =
K × Lbuckling L
where, Keff is the effective K factor for the member, K is the actual K factor for the member, Lbuckling is the effective buckling length for the member and, L is the actual length of the member. 8.5.2 Ky This option determines the effective Ky factor, about the local Y-axis, based on the reference length defined by two joints selected by the user, see Section 8.5.1.
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Precede 8.5.3 Kz This option determines the effective Kz factor, about the local Z-axis, based on the reference length defined by two joints selected by the user, see Section 8.5.1. 8.5.4 Lb=Lz Toggle This toggle determines whether the unbraced length of the compression flange of nontubular sections is to be set equal to the effective buckling length about the local Z axis when determining Kz or Lz for a member. To have Lb set equal to Lz, set the toggle to Lb=Lz. This toggle is also available under the Effective Length submenu. Refer to Section 8.6.4
8.6 EFFECTIVE LENGTH The Effective Length option may be used to calculate effective buckling length for members. Note: If K factors have been set for a member, then setting of effective lengths for a member will over-ride the K factors for that member and vice versa.
8.6.1 Ly & Lz This option determines an effective buckling length about both the local Y and Z axes based on the reference length defined by two joints selected by the user and the K-factor. The user selects two joints that define the reference buckling length to be used to calculate effective buckling length. The member or members which the effective length are to be determined are then selected. The reference length displayed on the Data line may be modified if desired. The effective buckling lengths are calculated as follows:
Leff = K × Lbuckling where, Leff is the effective buckling length for the member, K is the actual K factor for the member and, Lbuckling is the effective buckling length for the member. 8.6.2 Ly This option determines the buckling length in the local Y direction based on the reference length defined by two joints selected by the user, see Section 8.6.1. 8.6.3 Lz This option determines the buckling length in the local Z direction based on the reference length defined by two joints selected by the user, see Section 8.6.1. 8.6.4 Lb=Lz Toggle This toggle determines whether the unbraced length of the compression flange of nontubular sections is to be set equal to the effective buckling length about the local Z axis when determining Kz or Lz for a member. To have Lb set equal to Lz, set the toggle to Lb=Lz. This toggle is also available under the Effective Length submenu. Refer to Section 8.5.4
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Precede 8.7 UNBRACED LENGTH, LB The Lb feature allows the user to set the unbraced length of the compression flange for non-tubular members equal to the reference length defined by the two selected joints. Two joints defining the reference length are selected, then members whose Lb is to be set to the reference length are selected. Note: The reference length defined by the two joints selected may be overridden by entering a reference length into the Unbraced length, Lb field.
8.8 CONCRETE The Concrete features supported in Precede include concrete groups, concrete sections, rebar sections, slab groups and slab rebar. Refer to the Concrete Module documentation for complete details of these features. 8.8.1 Groups The Concrete Group option allows the user to add, modify or delete concrete property group data. This feature is similar to the member group feature(Section 8.1) for members. For example, steel beams can be specified using a general group type and specifying the section label which may be user defined(Section 8.2). In a like manner concrete groups are defined using a combination of user defined sections, a concrete section(Section 8.8.2) and a rebar section(Section 8.8.3).
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Concrete group data including concrete section label, steel properties of: Modulus of Elasticity, and density, and concrete properties of: EC Modulus, density and compressive strength may be specified. The properties of a previously defined concrete group may be copied.
Additional group data including shear reinforcement and post processing options may be specified on the Shear Reinforcement and Post Processing tabs.
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Segmentation for non-prismatic groups may be created or added by picking the AddSeg button. A new concrete group dialog will be displayed so that the properties of the new segment may be specified. Note: The Support Thickness is a legacy feature and should only be used if offset information is not available. Stresses will be considered at one half of the support thickness for code checking purposes.
8.8.2 Sections The Concrete Section option may be used to add, edit, delete or display concrete section property definitions by designating the section name then selecting the appropriate operation and section type. Section types supported include circular, rectangular, tee, right L, left L, and I.
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In addition to section dimensions, optional section property data may be specified on the Concrete Section Property dialog. Section properties may be copied from defined sections by entering the like section in the Copy field then picking the Copy button. The concentric tubular cross-section type is used for grouted members consisting of a tube inside another tube. Additional stiffened cylinder stiffener data may be specified. Box stiffener data is specified on the Box Stiffener dialog.
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Rebar sections labels are entered in the section label field. For Rebar section definitions refer to Section 8.8.3 for Rebar section definitions. The OD of the rebar as shown in the graphics below. Rebar.
Figure 8-1 Concrete circular section
Figure 8-3 Concrete T section
Figure 8-2 Concrete rectangular section
Figure 8-4 Concrete I section
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Figure 8-5 Concrete left L section
Figure 8-6 Concrete right L section
8.8.3 Rebar The Concrete Rebar option may be used to add, edit or delete concrete rebar property definitions by designating the section name then selecting the appropriate operation and section type. Section patterns supported include row, circular, box and prismatic.
Section properties may be copied from defined sections by entering the like section in the Copy field then picking the Copy button.
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Precede The rebar box pattern shown above would be entered as shown below in the Rebar Section definition dialog box. The width and height dimensions are centered on the centerline of the pattern.
8.8.4 Slab Group The Slab Group option allows the user to add, edit, or delete slab group data for the group specified in the group label field by selecting the appropriate operation. Slab group data including thickness, slab type, EC Modulus, Poisson's ratio, compressive strength, automatic neutral axis offset, local Z offset, density and stiffener data are specified in the Slab Group dialog. Slab group data may be copied from a previously defined slab group by entering the group to be copied in the copy group field then selecting the Copy button. The Slab Rebar label is entered in the “Reinf. Label”. The spacing between the Slab Rebars is defined in the “Spacing” field. The number of slab rebars of a given label will be determined by the width of the Slab group divided by the spacing between Slab Rebars. The Slab Rebars will be equally spaced across the Slab Group.
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8.8.5 Slab Rebar This option allows the user to add, edit or delete slab reinforcement data for slab groups. The slab rebar section label should be specified in the Section label field and the appropriate operation should be selected. Slab rebar. Properties may be copied from a currently defined slab rebar section by entering the section label of the section to be copied, then picking the Copy button. The “Distance from edge” is entered as the distance from designated location. The designated location is the defined in the Slab Group dialog in the “Placement” field.
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SECTION 9
LOAD FEATURES
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Precede 9.0 LOAD FEATURES Precede may be used to create loading directly on the model or to define operating data used by Seastate to generate environmental loading. The program has the ability to create loading for specific joint, member and/or plate loading manually designated by the user. Precede can also calculate loading based on general load data specified by the user. The load summation and the center of force of the loading to be created are reviewed. Selecting the Save button saves the loads created. Selecting Cancel aborts the load operation. Note: Loading that has been saved to the model can not be removed using the "Undo" feature. The "Undo" and "Redo" features do not apply to model load generation.
9.1 JOINTS The Joint load option allows the user to add, delete or edit joint loads for a specific load condition. Joint loading may be applied to a single joint or to multiple joints in the form of forces and/or moments in or about the global X, Y and Z directions, by selecting the appropriate joints. Joint loads may be added, deleted or modified by selecting the appropriate operation and specifying the Load condition and the Load ID label. Joint loads are added or modified using the Joint Load dialog.
After joint loads have been added or modified, the joints that are to be loaded are colored purple on the screen and displays the summation and center of force of the loading. To have the loading applied to the model, the Save button must be selected. The loading
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Precede operation may be aborted so that the loading is not applied to the model by selecting the Cancel button on the Sum of Forces dialog.
All existing joint loading assigned to a Load ID may be modified or deleted using this option. Select the operation (Delete or Edit), and specify the load condition and the Load ID. If editing joint loading, the loading details for each joint containing loads assigned to the ID specified will be displayed one joint at a time.
9.2 SPECIFIED DEFLECTIONS The Specified Deflection feature is used to add, delete or modify specified displacements to support joints. After selecting the applicable joints, the load condition and operation must be designated. X, Y and Z translations and/or X, Y and Z rotations may be specified along with the load ID on the Specified Deflection dialog. Note: Each degree of freedom for which a nonzero value is entered, will be fixed for that joint.
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Precede 9.3 MEMBER The Member load option allows the user to add, delete or edit member loads for a specific load condition. Member loading may be applied to a single member or to multiple members in the form of distributed forces, concentrated forces and/or concentrated moments in or about the member local or global X, Y and Z directions.
The operation, Load condition and the Load ID label are designated on the Member Loads dialog along with additional data including selection criteria, load type, group series data and total load.
The selection criterion designates members applicable for adding, modifying or deleting loading. The selected members option designates that the members picked with the mouse are to have loading added, modified or deleted. The Groups option designates that members assigned to one of the groups specified in the Group Label fields are to have loading either added, modified or deleted. All member loading of the load type specified, defined in the specified Load Condition labeled with the designated Load ID is deleted when the Load ID option is selected. All member loading defined in the specified Load Condition is deleted when the All option is designated. The Load ID and All option are only available when deleting member loading. The Load Type selection allows the user to choose whether distributed, concentrated or temperature loading is to be added, modified or deleted. The All option is only applicable for the delete operation. Series of members may be used when all members lying on a straight line between the two joints specified, are to be considered as one member. The Total load field applies to distributed loading and allows the user to specify the total load to be applied instead of the load per unit length.
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Precede Member distributed loads are defined on the Distributed Load dialog. The distance along the member to the beginning of the load, the load value at that position, the length of the load and the load value at the end of the loading are input. The load may be applied in the global or local coordinate system. The load may be defined along the appropriate coordinate axis by selecting the load direction. Note: The distance to the beginning of the load is NOT measured from the member start joint position, but is measured from the start of the member, including the effects of offsets, to the point where the load is to begin.
Member concentrated forces or moments are specified on the concentrated load dialog. The load type, force or moment, the distance to the load from the member beginning and the magnitude must be specified. The load direction, X, Y or Z, and the coordinate system, global or local, may also be specified.
Temperature loads are defined using the Temperature load dialog. The temperature gradient direction along with the coefficient of thermal expansion, the temperature change at the lower and upper surfaces and the distance between surfaces are also defined.
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9.4 MEMBER GROUPS This option allows the user to apply loading to Member group(s), see Section 9.3
9.5 PRESSURE The Pressure loading options allow the user to define area loading by specifying the area of a plane to which the loading applies. Precede creates either member distributed loads or plate joint loads based on tributary area. 9.5.1 Simple The Simple pressure load feature calculates member uniform distributed loading based on a uniform pressure and tributary areas. The rectangular area to be loaded is defined by selecting the four corner joints of the area. The plane formed by the four joints define the load plane such that the load plane X axis begins at the first joint and passes through the second joint selected. The load plane Y axis is perpendicular to the load plane X axis and passes through the third joint selected. The right hand rule is used to determine the load plane Z axis. The load area must be defined such that all members parallel to the line formed by joints A and B (load plane X axis) are continuous along the entire width of the load area. After defining the load area, the load condition, load ID and pressure are specified on the Data line. Uniform distributed member loads are generated normal to the load plane for members within the load area that are parallel to the load plane X axis, provided that the member's joints are within the plane tolerance of 0.25. 9.5.2 Complex The Complex pressure feature calculates member distributed loading based on a constant or varying pressure and tributary areas. The load plane is defined the first three joints selected such that the load plane X axis begins at the first joint and passes through the second joint selected. The load plane Y axis is perpendicular to the load plane X axis and passes through the third joint selected. The right hand rule is used to determine the load plane Z axis. Load areas may be rectangular, trapezoidal or triangular and are initially defined by the coordinates of the selected joints. Triangular areas are defined by selecting the same joint as joint three and four. After selecting the joints to define the load plane and the initial load area, the Pressure Load on Members dialog appears.
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The load condition, load ID label and out-of-plane tolerance are entered in the appropriate fields. Note: Any member lying in the load plane within the tolerance specified may be loaded. The actual elevation of the member including the effects of offsets is considered.
The Members to Load frame options designate whether members parallel to the load plane X axis (Along Local X) or members parallel to either the load plane X or Y axes (Along Local X and Y) are to be loaded. The Constant pressure, pressure Varying along the load plane Y axis or Total load option may be selected in the Load Input type frame. For constant pressure, the pressure is specified in the Pressure at Y min. If members in both the load plane local X and Y axes are to be loaded, the percent load applied to members parallel to the load plane local X axis is specified in the Percent along local X field. The Total force option generates member distributed loads based on a constant pressure calculated from the total load input in the Total load field and the area. For pressure varying along the local Y axis, the pressure at the bottom of the area or minimum local Y coordinate and the pressure at the top of the area or maximum local Y coordinate are specified. If members along both the local X and Y axes are to be loaded, the percent of the load applied to members parallel to the local X axis must be specified. The load direction, normal to the plane, along the global X axis, along the global Y axis or along the global Z axis is specified by selecting Normal, X, Y or Z, respectively, in the Load Direction combo box.
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Precede Upon selecting the OK button, the load area coordinates based on the joints selected are displayed. The coordinates of the load area may be modified appropriately.
Members parallel to the load plane local X, and optionally members parallel to the local Y axis, that are located within the defined area and the defined plane and tolerance are loaded. 9.5.3 Plate Area This option generates loads at corner joints of plates within the defined load area based on pressure load and the plate area. The rectangular load area is defined by selecting three joints that define the perimeter of the rectangle.
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The load condition, load ID label and out-of-plane tolerance are entered in the appropriate fields. Note: Any plate lying in the load plane within the tolerance specified is loaded. The actual elevation of the plate including the effects of offsets is considered.
The pressure may be input as constant or varying pressure. The load direction may be specified as normal to the plate, or in the direction of either the global X, Y or Z axes. Note: Normal plate pressure is applied normal to the plate itself not normal to the load plane. Therefore, the orientation of the plate local coordinate system determines the direction of the applied load.
Pressure varying along one of the global coordinate systems may be applied by selecting the appropriate axis and specifying the pressure and the coordinate at which to apply the pressure. Each plate is subdivided into triangular areas defined by two adjacent joints and the plate centroid. The load for each triangular area is calculated with each of the two joints getting half the load. Plates may be triangular or quadrilateral . Any area within the rectangular area defined by the 3 joints not covered by a plate, i.e. holes in the area, will not be considered for loading purposes.
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Precede 9.5.4 Plates This option allows the user to select individual plates or plate ranges that a pressure load is to be applied. The pressure load is applied as joint loads at the corner joint defining the plate element. If specific plates are to loaded, the plates should be selected with the mouse.
The load condition, load ID label and the constant pressure are specified. The pressure may be designated as normal to the plate or in the direction of the global X, Y or Z axis. Note: Normal plate pressure is applied normal the plate. Therefore, the orientation of the plate local coordinate system determines the direction of the applied load.
To include a range of plates without manually selecting each one, select a plate with the mouse and enter the additional plates in the Plate range field.
9.6 SKID This feature generates member concentrated loads resulting from skid or beam mounted structures whose support beams are parallel to either the global X or Y axes. A concentrated load is generated where a defined skid beam crosses a modeled beam element.
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The load condition, load ID must be specified. Skid data including the direction of the skid beams, the global coordinates of the geometric center, length, height and number of skid beams are input. If the center of force is not located at the geometric center of the skid, the global coordinates of the center of force should be entered. The skid forces and moments in the global X, Y and Z directions are specified in the Force and Moments fields respectively. Concentrated member loads are applied to members lying in the XY plane defined by the skid center Z coordinate and the out of plane tolerance, at the point intersected by a skid beam. Both ends of the member must lie within the specified tolerance of the defined XY plane including the effects of offsets.
9.7 MOVE EQUIPMENT The Move Equipment feature allows loading previously defined using the Pressure or Skid load features to be moved to another location in the same XY plane and/or another load condition. The load condition and load ID of the loading to be moved is specified along with the X and Y distances expressed relative to the initial position. The load condition to which the loading applies and the load ID may be changed by specifying a
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Precede new load condition and/or load ID in the new ID and new load condition fields respectively. The load may also be factored by specifying the load factor.
9.8 DUPLICATE EQUIPME N T This feature allows loading previously defined using the Pressure or Skid load features to be copied to another location in the same XY plane and/or another load condition. The load condition and load ID of the loading to be copied is specified along with the X and Y distances expressed relative to the initial position. The load condition to which the loading is to be copied to and the load ID are specified in the New load condition and New ID fields respectively. The load may also be factored by specifying the load factor.
9.9 DEAD LOADS This feature generates loading corresponding to the self weight of beam, plate and shell elements. The load condition and load ID along with the load direction and Acceleration factor must be designated. Dead loads may be generated for the entire structure, the portion of the structure that is active for display or the portion shown currently displayed by picking the All, Active or Screen button from the Include options frame respectively. The self weight of any portion of the structure may be displayed without generating loading by checking the 'For information only' box.
9.10 DELETE LC This feature allows the user to delete loading defined for a particular load condition and Load ID. The Load condition number and the Load ID are entered or selected using the browse button in the load condition and load ID fields respectively. The wild card character "*" may be specified as part of the load ID. All loading defined for the load condition may be deleted by specifying "*" as the Load ID.
9.11 DUPLICATE LC This feature allows for the duplication of a load condition by specifying the source load condition, the load ID, the destination load condition and the load factor in the load condition, Load ID, Duplicate LC and Factor fields on the Data line, respectively. The wild card character "*" may be specified as part of the load ID. All loading defined in the load condition may be copied by specifying "*" as the Load ID.
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Precede 9.12 COMBINE LC The Combine LC feature is used to add, modify or delete load combination definitions consisting of basic load conditions or previously defined combinations. The load condition number of the combination is prompted for then the Load Combination dialog is displayed. The load conditions and the appropriate factor that make up the combination are entered in the LC and Factor fields, respectively.
9.13 RING/ANODE 9.13.1 Ring Table This option provides the user the ability to specify a table defining ring size for ranges of tubular member sizes. The table is subsequently used to determine the size of rings to be placed on each member selected using the Rings option.
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Precede The outside diameter, wall thickness range of the tubular member and the corresponding ring thickness and ring height are entered. 9.13.2 Rings This feature creates a member concentrated load corresponding to the weight of a ring stiffener on a tubular member. The members to be loaded are selected then the Ring dialog appears. The load condition, the load ID, number of rings per member and the ring type are required. The ring load for a member is calculated based on the ring size designated on the ring table for the member diameter and thickness. 9.13.3 Anodes This feature creates member concentrated loads corresponding to the weight of the anodes. The members to be loaded are selected then the Anode dialog appears. The load condition, the load ID, the anode weight and the number of anodes per member are required. If the anodes are not equally spaced, the spacing in terms of percent of member length may be entered in the Distance fields. The anode loads are generated as member concentrated loads.
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SECTION 10
SEASTATE FEATURES
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Precede 10.0 SEASTATE FEATUR E S The Seastate features allow the user to define operating data used by the Seastate program when generating environmental loading.
10.1 GLOBAL PARAMETERS Data specified using features under this menu is considered global data applicable to all loading generated by Seastate regardless of load condition. 10.1.1 Drag/Mass Coeff The Drag/Mass Coeff feature allows the user to specify the coefficients of drag and mass.
The drag and mass coefficients may be designated as the default API values, calculated per API using wake encounter effects or specified by the user by selecting the API Default, API WE effect or the User defined Table type option, respectively. For the user defined option, the diameter and the coefficients of normal drag (Cd), tangential drag (CdT), normal mass (Cm) and tangential mass (CmT) are for clean (no marine growth) elements are designated in the Clean Members Table. If fouled members (with marine growth) are to have the same coefficients as clean members, the 'Use clean values for fouled members' box should be checked. If fouled members are to have
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Precede different values, the Fouled Member table is displayed when the Update button is selected. 10.1.2 Reynolds Number This option allows the user to specify Reynolds Number dependent drag coefficient factors.
10.1.3 Marine Growth Marine growth data may be defined using this option. Marine growth data is entered for zones specified relative to the mudline. The zone bottom elevation, top elevation, marine growth thickness, density, roughness, Cd, and Cm are specified in the Marine Growth table. Note: Only the zone bottom elevation is required if thickness is a linear function between zones. If the marine growth thickness is constant for a zone, only the bottom and top elevations should be specified.
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10.1.4 Wind Area The Wind Area feature allows for wind area or wind block definitions to be added, deleted, modified or displayed. After picking the operation to perform, the Wind Area definition dialog appears. The area label or identifier must be specified and the area type and coordinate system designated.
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Precede The wind area properties including the projected areas, centroid, shape factor, and distribution joints are specified on the Wind Area data dialog below.
10.1.5 Wind Shield Zones The Wind Shield Zones features allows wind shielding zones to be added, deleted or modified. The elevation zones specified will not have wind loading applied, ie deck elevations. This feature, typically used in conjunction with the Wind Area feature, allows elevations of the wind area to be excluded from the wind loading. 10.1.6 Submerged Area Submerged Area definitions may be added, deleted, modified or displayed by selecting the operation on the Operation dialog box and specifying the area name, type and coordinate system on the Submerged area dialog. The projected areas, centroid, shape factor and distribution joints are designated in the Submerged Area dialog. 10.1.7 Submerged Volume This feature allows the user to add, delete, edit or display submerged volume definitions by choosing the appropriate option and specifying the volume label, type and coordinate system on the Submerged Volume dialog. The volumes, centroid, shape factor and distribution joints are specified on the Submerged Volume data dialog. 10.1.8 Group Override This feature is used to add, delete or edit group override information by selecting the appropriate operation from the Operation dialog and specifying the group names in the Group label fields of the ensuing Hydrodynamic Group Override Data dialog.
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Precede The Display operation displays all defined group override data in the Report Window. The Group Override Data dialog appears when the Add or Modify operation is selected.
Group override data may be assigned to all segments of non-prismatic groups by checking the 'Apply to all segments' check box. The flood condition, material density, dimensions for force calculations, and coefficients of drag and mass overrides are specified in the appropriate fields. The Reynolds number dependency option and whether to apply marine growth may also be specified. 10.1.9 Member Override This feature is used to add, delete or edit member override information by selecting the appropriate members then choosing the operation from the Operation dialog. The Member Override Data dialog appears when the Add or Modify operation is chosen.
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The flood condition, material density, dimensions for force calculations, and coefficients of drag and mass overrides are specified in the appropriate fields. The Reynolds number dependency option and whether to apply marine growth may also be specified. 10.1.10 Plate Override This feature is used to add, delete or edit plate override information by selecting the appropriate plates then choosing the operation from the Operation dialog. The Plate Group Override Data dialog appears when the Add or Modify operation is chosen.
10.1.11 Dummy Structure This feature is used to define portions of the model as non-structural elements (dummy structures), or modify or delete existing dummy structure definitions. A maximum of 10 sets of non-structural elements may be defined in the model.
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Precede The operation and the appropriate dummy structure name are designated on the Dummy Structure dialog.
For define or edit operations, the Dummy Structure Definition dialog shown below appears.
Up to 20 boundary joints, the joints on the primary structure to which the dummy structure is attached, may be specified in the Boundary joint number fields. These joints correspond to the joints specified on the KEEP input line. The loading of the dummy structure will be transformed to the boundary joints. The joints that make up the dummy structure that are not attached to the primary structure, are designated in the Dummy Joints fields. These joint numbers will be placed on the DELETE line of the SACS input file. 10.1.12 Appurtenance Structure s Appurtenance structures may be defined, deleted or modified using this feature. Appurtenance structures are used for environmental loading purposes only and are not
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Precede physically connected to the primary structure. The stiffness of the elements of an appurtenance structure is ignored. 10.1.12.1 Appurtenance Groups The member groups defining members that are a part of the appurtenance structure are defined on the Remove Member Groups dialog. Only member groups consisting entirely of dummy members may be specified.
10.1.12.2 Appurtenance Members Individual members of the appurtenance structure that are not assigned to one of the member groups specified on the Remove Member Groups dialog are specified on the Remove Individual Members dialog.
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Precede 10.1.12.3 Appurtenance Joints The set of joints that make up the appurtenance structure are specified on the Remove Joint dialog. In addition, the primary structure member that the joint loading is to be transferred to must be specified next to the joint number. Note: The joint numbers specified must not have any primary structural elements attached. The members specified to receive the load, should not be incident upon any appurtenance structure joints.
10.1.13 Report Special environmental loading reports for selected members and/or member groups may be defined using this feature. In addition, existing report definitions may be deleted or modified. The operation and the report name must be specified on the Special Report dialog. If add or edit operations are chosen, the Special Report Member Groups dialog appears. The group name of all member groups to be reported are entered in the member joint pair fields. The Special Report Individual Member dialog follows. The member name of individual members to be reported are entered in the Member joint pair fields. Note: Either member groups, individual members or both member groups and individual members may be designated to have special reports created.
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10.2 LOADING The Loading features allow the user to define, edit, delete or display loading and/or operating data used by the Seastate program when generating environmental loading. Coefficients and override data specified using features under this menu apply to the designated load condition only and override any global definitions. The operation and the appropriate load condition must be specified in the Operation dialog after picking an menu item. The Display operation displays the details of the item selected in the Reports window. Choosing the Add or Edit operation activates the appropriate dialog so that data may be specified. 10.2.1 Wind The Wind Load dialog is used to specify wind load data. The wind velocity or pressure and the wind direction are required. The wind velocity is assumed to be the velocity at a reference height of 10.0 meters (33 feet). The wind variation options allow the user to vary the velocity with respect to height using any of the available options under the wind height variation option combo box.
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If any defined wind areas are to be included when generating wind load, the name of the area may be specified in the Wind Area group fields. Up to 18 area names may be input. By default, wind load is created for any member above the water still surface as determined from the water depth specified on the LDOPT input line. The still water depth may be overridden for this load condition in the Still W.D. override field. 10.2.2 Current Current load data is defined using this feature.
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The current direction and current distance/velocity table are required. Distance is input in terms of height above the mudline. Distances may be entered as percent of water depth if the Percent Water depth box is checked. The mudline elevation may be overridden in the mudline elevation override field. Current blocking may be designated on the API 20th Edition tab. If the automatic button is chosen, the reference elevation must be specified. The user defined option requires specifying the blocking factor. The effects of current on the wave period (Doppler shift) can be determined automatically by checking the Calculate apparent wave period check box. Note: If the Doppler shift is to be determined automatically, the wave period specified on the WAVE input line should be the actual wave period.
10.2.3 Dead load This feature is used if dead loads and buoyancy loads are to be generated.
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The direction in which gravity acts is required. The water depth and mudline elevation used when generating the buoyancy load may be overridden. 10.2.4 Wave The Wave feature is used to add, delete or edit wave loading.
The wave type must be selected from the nine available wave type options. The wave height, approach direction and either the period or length must be entered. Note: When accounting for the Doppler shift per API-RP2A 20th edition, the actual wave period should be entered if the apparent wave option is selected on the CURRENT card image. Otherwise, enter the apparent wave period.
The wave crest position information may be expressed in terms of length, degrees of a wave cycle or time by selecting Length, Degrees or Time as the definition units respectively. The initial position of the crest, the step size and the number of the crest positions to calculate wave loading must be indicated. The critical position option stipulates the crest position for which to save the wave loading.
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Additional wave information including spreading factor, water depth and mudline elevation overrides, member load segmentation, print options and STREAM function order may be entered on the Wave Parameters and Miscellaneous tabs. 10.2.5 Mudflow Mudflow loading data is specified using this option.
10.2.6 Drag The defined submerged areas and/or volumes that are to be considered when generating environmental loading for a particular load condition, are designated using this option.
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The load condition and the operation are indicated on the operation dialog. The group identifiers of the drag areas and/or volumes to be considered for this load condition are entered on the Submerged Area (Volume) dialog. 10.2.7 Group Override This option is used to override group data utilized in the calculation of self weight, buoyancy and environmental loads for the indicated load condition, see Seastate manual for options. Note: Load condition override data takes precedence over global override data.
10.2.8 Member Override This option is used to override member data utilized in the calculation of self weight, buoyancy and environmental loads for the indicated load condition, see Seastate manual for options. Note: Load condition override data takes precedence over global override data.
10.2.9 Plate Override This option is used to override plate data utilized in the calculation of self weight, buoyancy and environmental loads for the indicated load condition. See Seastate manual for options. Note: Load condition override data takes precedence over global override data.
10.2.10 Load Label Load condition titles may be entered using this option.
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10.2.11 LC Component Factors Load condition component factors for loading generated by the Seastate module and/or specified by the user may be added, deleted or changed using this feature.
10.2.12 Transfer Function This option may be used to define the parameters required to generate the waves to be used for the development of a transfer function for a static fatigue analysis.
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10.2.13 Repeat LC This option allows for all previously defined environmental load conditions to be repeated with a different wave, wind and current direction. This feature is only applicable when wave, wind and current approach directions are the same.
10.3 OPTIONS The Options feature is used to define, modify or delete Seastate environmental load generation options. Input and output options and the Seastate physical parameters are designated on the Load Options dialog. The designated options are saved when the Update button is selected. Existing Seastate options may be deleted by picking the Delete button. Selecting the Reports and the Simplified Hydro Collapse tabs accesses additional options including the analysis, hydrostatic collapse and print options.
10-17
Precede
10-18
Precede
10-19
Precede
10-20
Precede
SECTION 11
REPORT FEATURES
Precede
Precede 11.0 REPORT FEATURE S The Report features provide the capability to report model information to an external report file. Short reports and detailed reports are available. Short reports in general, show only contents of the model excluding any details. Detailed reports include detailed information of the item selected. For example, the short member information report shows only the member names, whereas the detailed report gives information about the member fixity, section properties, beta angle, reference joint, etc. The portion of the structure to include for reporting may be specified so that reports are generated only for items displayed on the screen, only items that are activated or all items. Additional report filters such as joint ranges, load conditions, member groups, etc. are available.
11.1 JOINTS The joint report feature generates a report containing the joint information including coordinates and fixity based on the selection criteria chosen. The joints to be included in the report may be filtered by specifying joint ranges in the appropriate fields. All joints within the specified ranges are included in the report. If 'Screen' selection criterion is chosen, then all joints displayed on the screen and within the specified ranges are included.
11.2 MEMBERS The member report feature generates a report containing member information including property group, releases, reference joint, orientation angle, flood condition, segmentation, cross section and yield strength. The members to be included in the report may be filtered by specifying joint ranges in the appropriate fields. All members connected to a joint within the specified ranges are included in the report. If the 'Screen' selection criterion is chosen, then only members displayed on the screen are considered. Note: All joints are considered when no joint range is input.
11.2.1 Member Offsets This option reports member offsets for all members displayed or all members in the structure by picking the Screen or All option, respectively. Joint ranges may be specified so that only members with at least one connecting joint within the designated ranges are reported.
11.3 PLATES The plate report option generates a report containing plate information including the property group, connecting joints and print option. The plates to be included in the report may be filtered by specifying joint ranges and/or plate name in the appropriate fields. If no range is designated, all joints are considered. All plates connected to a joint within the joint ranges (if specified) and whose name
11-1
Precede matches the plate name filter are included in the report. If the 'Screen' selection criterion is chosen, then only plates displayed on the screen are considered. Note: The wild card Character ’*’ may be specified in the Plate name filter.
11.3.1 Plate Offsets The plate offset report contains plate offsets for all plates displayed or all plates in the structure by picking the Screen or Entire Structure option, respectively. Joint ranges may be specified so that only plates with at least one connecting joint within the designated ranges are reported. A plate name filter may also be specified so that only plates whose name matches the filter are reported.
11.4 SHELLS The shell report option generates a report containing shell information including the thickness, connecting joints and print option. The shells to be included in the report may be filtered by specifying joint ranges and/or a shell name in the appropriate fields. If no joint range is designated, all joints are considered. All shells connected to a joint within the joint ranges (if specified) and whose name matches the shell name filter are included in the report. If the 'Screen' selection criterion is chosen, then only shells displayed on the screen are considered. Note: The wild card Character ’*’ may be specified in the Shell name filter.
11.5 PROPERTIES The Property report features generate member and plate group and cross section property reports. 11.5.1 Member Groups This feature generates a report containing the stiffness properties and the code check properties assigned to member groups. A member group name filter may be specified so that only groups matching the filter are reported. 11.5.2 Member Sections This feature generates a report containing cross section data and stiffness properties assigned to member sections. A member section name filter may be specified so that only sections matching the filter are reported. 11.5.3 Plate Groups Plate group data including thickness, density, Modulus of Elasticity, Poisson's ratio, yield, etc. are reported using this feature. A plate group name filter may be specified so that only groups matching the filter are reported. 11.5.4 Plate Stiffeners The Plate Stiffener report generated using this feature contains plate stiffener section data. A plate stiffener section filter may be specified so that only section names matching the filter are reported.
11-2
Precede 11.5.5 Library This feature allows the user to list the member section labels for a short report, or the member section properties for a detailed report, for all sections in the default member section library file.
11.6 LOADS Defined loading is reported using the Loads report features. A load condition filter and a load identification label filter may be specified so that only load contained in load conditions that match the load condition filter and with a label that matches the ID filter are reported. 11.6.1 Contents This feature is used to display the contents of one or more load conditions. The short report shows only load identification labels of the load condition. The detailed report, shows each joint and member load input line contained in the load condition in addition to any Seastate load generation input lines. 11.6.2 Summation This feature sums the loading for each load condition that matches the load condition and ID filters specified. If the Screen option is chosen, then only loading assigned to joints or elements displayed are summed. 11.6.3 All Above The All Above feature generates both a load contents and a load summation report. 11.6.4 Sum By Ids This option generates the total summation of all loads assigned to a particular load ID.
11.7 MODEL INFO This option reports current model information to the Report window. This information includes the number of joints, structural elements, properties, loads, etc.
11.8 TEXT FILE This option allows the user to browse any ASCII file in the Report window.
11-3
Precede
11-4
Precede
SECTION 12
OPTIONS FEATURES
Precede
Precede 12.0 OPTIONS FEATURE S Model analysis options are added, deleted and/or changed using the features of this menu.
12.1 ANALYSIS This feature is used to define the SACS analysis options. The working units, analysis type and code check option should be specified on the following dialog. Additional options may be selected by checking the appropriate check boxes. The Number of stress check segments corresponds to the number of segments each member (for prismatic) or each segment of the member (non-prismatic) is to be divided into for code check purposes. The Post module checks the beginning and end of each code check segment. The total number of basic load conditions and load combinations may also be specified. If this information is not specified, the program will determine the number of load conditions automatically. However, if the number of load conditions is entered, it must match the number of load conditions contained in the model or the pre-processing module will terminate execution.
12-1
Precede
The desired reports are specified by selecting the Report tab.
12-2
Precede
12.2 SELECT LOAD COND ITION The Select Load Condition feature is a replacement for the LDCASE line and may be used to specify the load conditions in the SACS input file that are to be used for a particular analysis. This line can be repeated as often as necessary to select any or all of the load conditions, and should follow the OPTIONS line in the SACS model file. Note: This line should not be used in conjunction with the LDCASE line.
12.2.1 Standard This feature allows the user to select load conditions to be used for a standard static and/or PSI analysis. 12.2.2 Dynamic Mass This feature allows the user to select load conditions which are to be converted to mass for dynamic characteristics.
12-3
Precede 12.2.3 P-Delta This feature allows the user to designate gravity load conditions to be used to determine P-Delta effects for second order analysis and/or moment magnifiers for concrete first order analysis.
12.3 LOAD CONDITION FACTOR These features are used to factor load conditions based upon analysis type. The factors specified appear on the LCFAC input line. 12.3.1 Standard This feature allows the user to factor load conditions used for a standard static and/or PSI analysis. 12.3.2 Dynamic Mass This feature allows the user to factor load conditions to be converted to mass for dynamic characteristics. 12.3.3 P-Delta This feature allows the user to factor gravity load conditions used to determine P-Delta effects for a second order analysis and/or moment magnifiers for concrete first order analysis.
12.4 ALLOWABLE STRESS /MAT FACTOR The Allowable Stress/Mat Factor option allows for the specification of allowable stress factors for particular load conditions. The load conditions and the factors specified in the appropriate fields appear on the AMOD input line. Allowable stress data on existing AMOD input lines may be removed from the model by selecting the Delete button.
12-4
Precede 12.5 UNITY CHECK RANGES This option allows the user to specify the unity check ranges to be used when reporting unity checks in partitions. Deleting specified ranges reverts the ranges back to the default values.
12.6 REDESIGN This feature allows for the specification of redesign parameters on the REDESIGN input line used when the redesign option on the OPTIONS input line is selected. If no redesign options are specified, default values are used. The REDESIGN input line may be deleted by picking the Delete button.
12-5
Precede
12.7 REDESIGN DT This feature is used to impose upper limits on the diameter to thickness ration of tubular members as a function of water depth. Information specified is applied to the REDES3 input line. Existing data may be removed from the model by picking the Delete button.
12-6
Precede 12.8 HYDROSTATIC COLLAPSE This option defines, modifies or deletes hydrostatic collapse options designated on the HYDRO input line. Existing HYDRO input lines can be deleted from the model by selecting the Delete button.
12.9 CONCRETE This option allows the user to set concrete analysis and reporting options.
12-7
Precede
12-8
Precede
SECTION 13
MISCELLANEOUS FEATURES
Precede
Precede 13.0 MISCELLANEOUS FEATURES 13.1 TITLE This option provides the capability to add and/or modify the model title information. Note: Each 80 column title line is shown as two title lines in the table.
13.2 MODIFY LEG This feature is used to modify an existing leg. The X and Y coordinate distance from the origin to the leg at the working point elevation and the leg batter may be modified for any of the currently defined legs. The Next Leg button and Previous Leg button allows the user to switch the leg to be modified. Note: Changes to leg data can not be undone using the "Undo" feature.
13-1
Precede
13.3 CREATE LEG This feature adds secondary legs, skirt piles or conductors that were not originally defined during the automatic generation procedure to the existing structure. The structure must have existing legs and elevations defined according to the Precede conventions, see Section 2.2.1. Legs added using this feature are considered secondary legs, ie. face and plan views are not redefined when generating a new leg.
13-2
Precede
Note: The leg number specified must be an odd number.
13.4 DEFINE LEG Legs may defined so that face and elevation plan views may be generated by the program automatically. The leg and pile joint numbering scheme must adhere to the requirements defined in Section 2.2.1 The number of main legs is required. The main leg numbers followed by secondary numbers should be specified in the Leg fields.
13-3
Precede
13.5 MODIFY ELEVATION Model elevations that were defined during the automatic jacket generation may be modified using this feature. Elevations may not be added or deleted using this feature. In addition, the number of joints reserved at each elevation, and row designations may be changed using this feature. Modifications made using this feature may not be undone using the "Undo" command.
13-4
Precede
13.6 CREATE CONDUCTOR This feature adds skirt piles or conductors that were not originally defined during the automatic generation procedure to the existing structure. The structure must have existing legs and elevations defined according to the Precede conventions, see Section 2.2.1.
13.7 MERGE This option is used to merge the contents of a SACS input model file into the current model. Note: Duplicate joints, structural elements, and properties from the model file being merged are ignored.
13.8 CHECK MODEL This feature performs a check of the model data. References to undefined data is noted along with data that has been defined but is not being referenced by existing structural elements. When executing the data check feature, the following data validity checks are made. Joints Disconnected joint (ie. joint defined, but is not attached to any structural element and is not used as a reference joint. 1. Undefined joint loaded. 2. Undefined joint referenced by a member. 3. Undefined joint referenced by a plate element.
13-5
Precede 4. Undefined joint referenced by a wind area. 5. Undefined joint referenced by submerged area. 6. Undefined joint referenced by submerged volume. Members 1. Member not assigned to a property group. 2. Member assigned to undefined property group. 3. Member reference joints form a straight line with end joints. 4. Undefined member loaded. 5. Member defined more than once. 6. Member connected to undefined joint. 7. Member length inconsistent with non-prismatic group segment lengths. Plates Plate name is used more than once. Plate connected to undefined joint. Plate not assigned to a plate property group. Plates assigned to undefined plate property group. Shells Shell element name used more than once. Shell connected to undefined joint. Properties Member property group not assigned to any members. Member section not assigned to any group. Member group references undefined section. Member group has multiple zero length segments defined. Plate group not assigned to any plate elements. Plate group references undefined plate stiffener section. Plate stiffener section not used by any plate group. Loads Load applied to an undefined joint. Load applied to an undefined member.
13-6
Precede
SECTION 14
HELP FEATURES
Precede
Precede 14.0 HELP FEATURES Selecting the Help menu activates the help file browse facility. The user may browse through the menu items or the list of keywords and terms that are provided. The appropriate menu item is referenced for keywords and terms listed.
14-1
Precede
14-2
Precede
SECTION A
APPENDIX
Precede
Precede A.0 APPENDIX A.1 PRECEDE COMMENT DATA Precede places special comment data used only by the SACS graphics programs. In general this data defines view and model creation information and begins with the characters "**". The data is ignored by SACS batch programs and can be deleted from the model file if desired. Note: If the comment data is removed from the model file, the graphical information will not be available when using SACS graphics programs.
The following details the special comment cards created by the Precede program. The column numbers and the comment data description follow. A.1.1 Leg Data Comment #1 One for each leg defined 2-9 "**LEG1**" 13-14
Leg number (1-99)
15-24
X coordinate at the working point
25-34
Y coordinate at the working point
35-44
Z coordinate at the working point
45-54
X coordinate at the mudline
55-64
Y coordinate at the mudline
65-74
Z coordinate at the mudline
A.1.2 Leg Data Comment #2 One following each Leg Data #1 input line 2-9 "**LEG2**" 13-14
Leg number (1-99)
15-24
Z coordinate at the top of the structure
25-34
Z coordinate at the bottom of the structure
35-44
Z coordinate at the top of the pile
45-48
Pile type indicator
49-52
Grout indicator
53-56
Leg type indicator
A.1.3 Elevation Data Header 2-9 **ELEV**" 11-20
Elevation at the mudline
21-24
Number of joints at mudline elevation (100)
25-34
Elevation at the working point
A-1
Precede 35-38
Number of joints at the working point (100)
39-48
Elevation at the bottom of the structure
49-52
Number of joints at the bottom of the structure (100)
53-62
Elevation at the pile connection point
63-66
Number of the next joint available at top of structure
A.1.4 Elevation Data Commen t 2-9 "**ELEV**" 11-20
Intermediate elevation #1
21-24
Number of joints at the elevation(100 maximum)
25-34
Intermediate elevation #2
35-38
Number of joints at the intermediate elevation
39-48
Intermediate elevation #3
49-52
Number of joints at the intermediate elevation
53-62
Intermediate elevation #4
63-66
Number of joints at the intermediate elevation
67-76
Intermediate elevation #5
77-80
Number of joints at the intermediate elevation
A.1.5 Leg Member Group Label Data 2-9 "**LGLB**" 11-13
Number of leg member group labels to input
14-16
Group label 1
17-19
Group label 2
etc. A.1.6 Pile Member Group Label Data 2-9 "**PLLB**" 11-13
Number of pile member group labels to input
14-16
Group label 1
17-19
Group label 2
A.1.7 Jacket Row Definitions One input line allowed 2-9 "**ROWS**" 11-18
User alphanumeric definition of jacket Row A
19-26
User alphanumeric definition of jacket Row B
27-34
User alphanumeric definition of jacket Row 1
35-42
User alphanumeric definition of jacket Row 2
A-2
Precede 43-50
User alphanumeric definition of jacket Row 3
51-58
User alphanumeric definition of jacket Row 4
A.1.8 User Defined View Com ment #1 One for each view defined 2-9 "**SVS1**" 11-18
View identification
19-58
View title
59-62
Horizontal shift factor of view
63-66
Vertical shift factor of view
67-70
3 dimensional indicator
A.1.9 User Defined View Com ment #2 Follows each View Comment #1 input line 2-9 "**SVS2**" 11-24
Scale factor for view
25-38
Out of plane tolerance for view
39-52
X coordinate of view origin
53-66
Y coordinate of view origin
67-80
Z coordinate of view origin
A.1.10 User Defined View Com ment #3 Follows User View Comment #2 input line 2-9 "**SVS3**" 11-24
Element 1,1 of transformation matrix for view
25-38
Element 2,1 of transformation matrix for view
39-52
Element 3,1 of transformation matrix for view
53-66
Element 1,2 of transformation matrix for view
67-80
Element 2,2 of transformation matrix for view
A.1.11 User Defined View Com ment #4 Follows User View Comment #3 input line 2-9 "**SVS4**" 11-24
Element 3,2 of transformation matrix for view
25-38
Element 1,3 of transformation matrix for view
39-52
Element 2,3 of transformation matrix for view
53-66
Element 3,3 of transformation matrix for view
A-3
Precede A.1.12 User Defined View Com ment #5 Follows User View Comment #4 input line 2-9 "**SVS5**" 11-12
Joint display indicator
13-14
Member display indicator
15-16
Plate display indicator
17-18
Shell element display indicator
19-20
Hardcopy rotate 90 degrees indicator
21-22
Hardcopy left justify indicator
23-24
Hardcopy zoom indicator
25-26
Plot element offsets indicator
27-30
Scale factor numerator
31-34
Scale factor denominator
35-36
Disconnected joint indicator
37-38
Joint unroll display indicator
39-42
Display labels indicator
43-44
Number of group labels (Maximum of 12)
45-46
Group label include or exclude indicator
47-48
Number of joint ranges (Maximum of 4)
49-52
Minimum joint number of range 1
53-56
Maximum joint number of range 1
57-60
Minimum joint number of range 2
61-64
Maximum joint number of range 2
65-68
Minimum joint number of range 3
69-72
Maximum joint number of range 3
73-76
Minimum joint number of range 4
77-80
Maximum joint number of range 4
A.1.13 User defined View Comment #6 Follows User View Comment #5 input line 2-9 "**SVS6**" 11-20
Minimum X value for volume
21-30
Maximum X value for volume
31-40
Minimum Y value for volume
41-50
Maximum Y value for volume
51-60
Minimum Z value for volume
61-70
Maximum Z value for volume
A-4
Precede A.1.14 User Defined View Com ment #7 Follows User View Comment #6 input line 2-9 "**SVS7**" 11-13
First group label
14-16
Second group label
19-20
Hardcopy rotate 90 degrees indicator
A.1.15 Special Joint Designato r Data 1-9 "***SPJT**" 11-14
Joint number
15
Joint designator
16-19
Joint number
20
Joint designator
21-24
Joint number
25
Joint designator
26-29
Joint number
30
Joint designator
etc. Note: For joints not designed by the user: L-leg, P-pile, X-xbrace, Kkbrace, T-through member, blank-all other joints. For joints designed by the user: M-leg, Y-xbrace, J-kbrace, U-through member, Z-all other joints.)
A.1.16 Special Member Designator Data 1-9 "***SPMB**" 11-14
Joint number of member at end A
15-18
Joint number of member at end B
19-30
Member designator (L-leg, P-pile, W-wishbone, X-xbrace, K-kbrace, H-horizontal, D-diagonal)
31-34
Joint number of member at end A
35-38
Joint number of member at end B
39-50
Member designator
51-54
Joint number of member at end A
55-58
Joint number of member at end B
59-70
Member designator
A.1.17 Equipment Definition Comment #1 1-9 "***LDS1**" 11-20
X of LL corner of pressure or X of center of skid
21-30
Y of LL corner of pressure or Y of center of skid
A-5
Precede 31-40
Z of LL corner of pressure or Z of center of skid
41-50
X of LR corner of pressure or X of center of force
51-60
Y of LR corner of pressure or Y of center of force
61-70
Z of LR corner of pressure or Z of center of force
71-80
X of UL corner of pressure or Fx at center of force
A.1.18 Equipment Definition Comment #2 Follows Equipment Comment #1 1-9 "***LDS2**" 11-20
Y of UL corner of pressure or Fy at center of force
21-30
Z of UL corner of pressure or Fz at center of force
31-40
X of UR corner of pressure or Mx at center of force
41-50
Y of UR corner of pressure or My at center of force
51-60
Z of UR corner of pressure or Mz at center of force
61-70
Pressure at LL-LR of area or length of skid
71-80
Pressure at UL-UR of area or width of skid
A.1.19 Equipment Definition Comment #3 Follows Equipment Comment #2 1-9 "***LDS3**" 11-20
Tolerance of defined plane
21-24
Percent of pressure or force direction indicator
25-28
Force direction indicator
29-32
Force direction indicator or number of skids
33-36
Both direction indicator
37-40
0
41-44
Load condition
45-48
-2 for pressure or -1 for skid
49-52
"EQUP"
53-56
"PRES" for pressure or "SKID" for skid
57-64
Load identification label
65
Load direction
A-6
Precede
SECTION B
INDEX
Precede
Precede B.0 INDEX Combine LC Load, 9-12
2
Comment data, A-1 Concrete
2 Line
Option, 12-7
Display, 4-11
Concrete, 8-9 Group, 8-9 Rebar, 8-14 Section, 8-11 Slab group, 8-15 Slab rebar, 8-16
3 3 joint Display plane, 4-2
3D solid, 4-20
Conductors, 2-2, 2-5 Configg.sac, 1-1 Configuration, 1-1 Contents
A Active display, 4-1 Add
Report, 11-3
Create conductor
Absolute, 5-1 Divide a line, 5-2 Intersection, 5-1 Joint, 5-1 Member, 6-2 Relative, 5-1 Relative to a line, 5-1 Angle, 5-2 Length, 5-2 X-coordinate, 5-2 Y-coordinate, 5-2 Z-coordinate, 5-2
Miscellaneous, 13-5
Create leg Miscellaneous, 13-2
Curve down Leader type, 4-19
Curve up Leader type, 4-19
Cylinder Display, 4-17 Flat, 4-17 Round, 4-17
Add quadrilateral
D
Plate, 7-2
Add triangular
Dead load
Plate, 7-1
Load, 9-11
All above
Default group names, 2-5 Define as
Report, 11-3
Allowable stress/mat factor
K-brace, 6-6 Member, 6-6 Through off line, 6-6 Through on line, 6-6 X-brace, 6-6
Option, 12-4
Analysis Option, 12-1
Arrow type Both ends, 4-19 None, 4-20 To end, 4-20
Define defaults Member, 6-4 Plate, 7-3
Axis system
Define leg
Dimension, 4-18
Miscellaneous, 13-3
Delete
B
Element, 4-12 Joint, 4-12, 5-10 Member, 4-12, 6-4 Plate, 4-12, 7-3
Beginning a modeling session, 2-1 Both ends Leader type, 4-19
Delete LC
Bracing, 2-5
Load, 9-11
Delete many Joint, 5-10
C
Design
Check model
Automatic, 5-12 Exclude joint, 5-15 Include joint, 5-15 Joint, 4-16, 5-12 Manual, 5-13 Reset list, 5-15
Joint, 13-5 Load, 13-6 Member, 13-6 Miscellaneous, 13-5 Plate, 13-6 Property, 13-6 Shell, 13-6
Details/Modify Joint, 5-1 Member, 6-1
Close model, 3-4
B-1
Precede Plate, 7-1
Name, 4-7 Show in 3D, 4-12 Special, 4-9 Dummy structure, 4-9 Members w/o properties, 4-9 None, 4-9 Out of plane offsets, 4-9 Rows & elevations, 4-9 Through member, 4-9 Unzoom, 4-16 View, 4-16 Delete, 4-17 Rename bin, 4-17 Save, 4-17 Select, 4-17 XY plane, 4-2 XY volume, 4-2 XZ plane, 4-2 XZ volume, 4-2 YZ plane, 4-2 YZ volume, 4-3 Zoom box, 4-12 Delete element, 4-12 Delete joint, 4-12 Delete member, 4-12 Delete plate, 4-12 Increment joint, 4-12 Joint design, 4-16 Translate/Rotate, 4-12 Zoom display, 4-12
Dimension Add, 4-18 Axis system, 4-18 Delete, 4-18 Display, 4-18 Distance, 4-18 Edit, 4-18 None, 4-18 Settings, 4-18 User label, 4-18
Display, 4-1 2 Line, 4-11 3 joint plane, 4-2 Active/Isometric, 4-1 Cylinder, 4-17 Flat, 4-17 Round, 4-17 Dimension, 4-18 Add, 4-18 Delete, 4-18 Edit, 4-18 Settings, 4-18 Face, 4-1 Joint, 4-4 Joint Design, 4-4 Dynamic BC, 4-4 Fixity, 4-4 Numbering, 4-4 Symbol, 4-4 Labeling, 4-4 Load, 4-8 Joint, 4-8 Member concentrated, 4-8 Member distributed, 4-8 Temperature, 4-8 Load diagram, 4-10 Member, 4-5 Ky or Ly, 4-5 Kz or Lz, 4-5 Lb, 4-5 Local CS or Ly, 4-5 Offset, 4-6 Orientation, 4-5 Section, 4-5 Yield strength, Fy, 4-5 Member group label, 4-5 Plan, 4-1 Plane, 4-2 Plate, 4-6 Full size, 4-6 Group label, 4-6 Local CS, 4-6 Name, 4-6 Offsets, 4-6 Reset select, 4-4 Reset volumes, 4-3 Rotate Screen, 4-11 X-axis, 4-11 Y-axis, 4-11 Z-axis, 4-11 Rotate, 4-11 SACS 3D, 4-20 Select, 4-3 Shell, 4-7 Full size, 4-7 Local CS, 4-7
Distance Dimension, 4-18 Horizontal, 4-19 Joint, 5-1 True, 4-18 Vertical, 4-18
Divide Equal parts, 6-4 Length, 6-3 Member, 6-3 On member, 6-4 Perpendicular, 6-4 Plate, 7-3 Ratio, 6-3 XY plane, 6-3 XZ plane, 6-3 YZ plane, 6-4
Duplicate Face, 6-7 Mirror face, 6-7 Plan, 6-7
Duplicate equipment Load, 9-11
Duplicate LC Load, 9-11
Duplicate/Mirror Member, 6-6
DXF Export, 3-4
E Effective length Lb=Lz, 8-8 Ly, 8-8 Ly & Lz, 8-8 Lz, 8-8 Property, 8-8
B-2
Precede Element
I
Delete, 4-12
Executive, 1-1 Exit, 2-6, 3-4 Export
Introduction, 1-1 Isometric display, 4-1
DXF, 3-4 NPF, 3-4 Windows Clipboard, 3-4 Windows metafile, 3-4
J Jacket, 2-1 Jacket information, 2-1 Joint, 5-1
Exporting, 3-3
Add, 5-1 Absolute, 5-1 Divide a line, 5-2 Intersection, 5-1 Relative, 5-1 Relative to a line, 5-1
F Face Display, 4-1
Faces
Angle, 5-2 Length, 5-2 X-coordinate, 5-2 Y-coordinate, 5-2 Z-coordinate, 5-2
Plot, 3-3
File, 3-1 Find Joint, 5-1 Member, 6-1 Plate, 7-1
Delete, 4-12, 5-10 Delete many, 5-10 Design, 4-4, 4-16, 5-12 Automatic, 5-12 Exclude joint, 5-15 Include joint, 5-15 Manual, 5-13 Reset list, 5-15 Details/Modify, 5-1 Display, 4-4 Distance, 5-1 Dynamic BC, 4-4 Find, 5-1 Fixities, 5-11 Fixity, 4-4 Grid, 5-2 Labeling, 4-4 Load, 9-1 Mesh, 5-3 Cylindrical, 5-4 Rectangular, 5-3 Spherical, 5-5 Move, 5-6 Number, 4-4 Rename, 5-6 Reorder, 5-6 Report, 11-1 Spring, 5-12 Symbol, 4-4 Translate/Rotate, 5-7 About a line, 5-9 General, 5-8 Mirror image, 5-8
Fixities Joint, 5-11
Full set Plot, 3-3
G General information, 1-1 Generating a jacket structure, 2-1 Getting started, 2-1 Global parameters Appurtenance structure, 10-7 Drag/Mass coef, 10-1 Dummy structure, 10-6 Group override, 10-4 Marine growth, 10-2 Member override, 10-5 Plate override, 10-6 Report, 10-9 Reynolds number, 10-2 Seastate, 10-1 Submerged area, 10-4 Submerged volume, 10-4 Wind area, 10-3 Wind shield zones, 10-4
Grid Joint, 5-2
Group Concrete, 8-9
Group name default, 2-5
Joints
Grouted structures, 2-2
Measure, 4-19
H
K
Help, 14-1 Horizontal
K-brace Member, 6-2
Distance, 4-19
K-factor
Hydrostatic collapse
Ky, 8-7 Ky & Kz, 8-7 Kz, 8-8 Lb=Lz, 8-8
Option, 12-7
B-3
Precede Plate, 7-3
Property, 8-7
M
L
Margin
Labeling
page setup, 3-3
Display, 4-4
Measure
Leader type
Joints, 4-19 Points, 4-19
Curve down, 4-19 Curve up, 4-19 None, 4-19 S curve, 4-19 Straight, 4-19
Member Report, 11-1
Member, 6-1
Leg data
Add, 6-2 Define as, 6-6 K-brace, 6-6 Through off line, 6-6 Through on line, 6-6 X-brace, 6-6 Define defaults, 6-4 Delete, 4-12, 6-4 Details/Modify, 6-1 Display, 4-5 Divide, 6-3 Equal parts, 6-4 Length, 6-3 On member, 6-4 Perpendicular, 6-4 Ratio, 6-3 XY plane, 6-3 XZ plane, 6-3 YZ plane, 6-4 Duplicate Face, 6-7 Mirror face, 6-7 Plan, 6-7 Duplicate/Mirror, 6-6 Find, 6-1 Group label, 4-5 K-brace, 6-2 Ky or Ly, 4-5 Kz or Lz, 4-5 Lb, 4-5 Load, 9-3 Local CS, 4-5 Mesh tubular, 6-7 Offset, 4-6, 6-1, 11-1 Orientation, 4-5 Section, 4-5 Set to default, 6-6 String, 6-2 Wishbone, 6-2 X-brace, 6-2 Yield strength, Fy, 4-5
Specifying, 2-3
Load Report, 11-3
Load, 9-1 Combine LC, 9-12 Current, 10-11 Dead load, 9-11, 10-12 Delete LC, 9-11 Display, 4-8, 4-10 Drag, 10-14 Duplicate equipment, 9-11 Duplicate LC, 9-11 Group override, 10-15 Joint, 4-8, 9-1 LC component factor, 10-16 Load label, 10-15 member, 9-3 Member concentrated, 4-8 Member distributed, 4-8 Member Group, 9-5 Member override, 10-15 Move equipment, 9-10 Mudflow, 10-14 Plate, 9-9 Plate override, 10-15 Pressure, 9-5 Complex, 9-5 Plate area, 9-7 Simple, 9-5 Repeat LC, 10-17 Ring/Anode, 9-12 Anode, 9-13 Ring, 9-13 Ring table, 9-12 Screen, 4-11 Seastate, 10-10 skid, 9-9 Specified deflection, 9-2 Temperature, 4-8 Transfer function, 10-16 Wave, 10-13 Wind, 10-10 X-axis, 4-11 Y-axis, 4-11 Z-axis, 4-11
Member group Load, 9-5 Property, 8-1
Member section Property, 8-3
Load condition factor
Merge
Standard, 12-4
Miscellaneous, 13-5
Load condition factor
Mesh
Dynamic mass, 12-4 Option, 12-4 P-delta, 12-4
Cylindrical, 5-4 Joint, 5-3 Rectangular, 5-3 Spherical, 5-5
Local z down Plate, 7-4
Mesh tubular
Local z up
Member, 6-7
B-4
Precede Option
Miscellaneous, 13-1
Seastate, 10-17
Check model, 13-5 Joint, 13-5 Load, 13-6 Member, 13-6 Plate, 13-6 Property, 13-6 Shell, 13-6 Create conductor, 13-5 Create leg, 13-2 Define leg, 13-3 Merge, 13-5 Modify elevation, 13-4 Modify leg, 13-1 Title, 13-1
Overview, 1-1
P Page Setup, 3-3 Parallel bracing layout, 2-5 Pile stubs, 2-2 Plan Display, 4-1
Plane 3 joints, 4-2 Display, 4-2
Model, 2-1
Plans
New, 3-1 Open, 3-1 Save, 3-1 Save As, 3-2 settings, 3-2
Plot, 3-3
Plate Offset, 11-2 Report, 11-1
Plate, 7-1
Model info
Add quadrilateral, 7-2 Add triangular, 7-1 Define defaults, 7-3 Delete, 4-12, 7-3 Details/Modify, 7-1 Display, 4-6 Divide, 7-3 Find, 7-1 Full size, 4-6 Group label, 4-6 Load, 9-9 Local CS, 4-6 Local z down, 7-4 Local z up, 7-3 Name, 4-6 Offset, 4-6 Rename, 7-2 Set to default, 7-3 Shell element, 7-4
Report, 11-3
Modify elevation Miscellaneous, 13-4
Modify leg Miscellaneous, 13-1
Move Joint, 5-6
Move equipment Load, 9-10
N Neutral picture file Export, 3-4 Save, 3-2
New Model, 3-1 Non-grouted structures, 2-2 NPF
Plate group Property, 8-4
Export, 3-4 Save, 3-2
Plate stiffener section Property, 8-6
Plot, 3-2
O
Faces, 3-3 Full set, 3-3 plans, 3-3 Screen, 3-3 Select view, 3-3 Title, 3-3 Views, 3-3
Offset Member, 6-1
Open model, 3-1 Option Allowable stress/mat factor, 12-4 Analysis, 12-1 Concrete, 12-7 Hydrostatic collapse, 12-7 Load condition factor, 12-4 Dynamic mass, 12-4 P-delta, 12-4 Standard, 12-4 Redesign, 12-5 Redesign DT, 12-6 Select load condition Dynamic mass, 12-3 P-delta, 12-4 Standard, 12-3 Select load condition, 12-3 Unity check Range, 12-5
Points Measure, 4-19
Pressure Complex, 9-5 Load, 9-5 Plate area, 9-7 Simple, 9-5
Program overview, 1-1 Property Library, 11-3 Member group, 11-2 Member section, 11-2 Plate group, 11-2 Plate stiffener, 11-2 Report, 11-2
Option, 12-1
B-5
Precede Ring/Anode
Property, 8-1
Andoe, 9-13 Load, 9-12 Ring, 9-13 Ring table, 9-12
Concrete, 8-9 Effective length, 8-8 Lb=Lz, 8-8 Ly, 8-8 Ly & Lz, 8-8 Lz, 8-8 K-factor, 8-7 Ky, 8-7 Ky & Kz, 8-7 Kz, 8-8 Lb=Lz, 8-8 Member group, 8-1 Member section, 8-3 Plate group, 8-4 Plate stiffener section, 8-6 Unbraced length, Lb, 8-9
Rotate Display, 4-11
S S curve Leader type, 4-19
Sacgcfg, 1-1 SACS 3D, 4-20 3D solid, 4-20
Save model, 3-1 Save Model As, 3-2 Save NPF As, 3-2 Screen
R
Plot, 3-3
Rebar
Seastate, 10-1
Concrete, 8-14 Slab, 8-16
Global parameters, 10-1 Appurtenance structure, 10-7 Drag/Mass coef, 10-1 Dummy structure, 10-6 Global override, 10-4 Marine growth, 10-2 Member override, 10-5 Plate override, 10-6 Report, 10-9 Reynolds number, 10-2 Submerged area, 10-4 Submerged volume, 10-4 Wind area, 10-3 Wind shield zones, 10-4 Load, 10-10 Current, 10-11 Dead load, 10-12 Drag, 10-14 Group override, 10-15 LC component factor, 10-16 Load label, 10-15 Member override, 10-15 Mudflow, 10-14 Plate override, 10-15 Repeat LC, 10-17 Transfer function, 10-16 Wave, 10-13 Wind, 10-10 Option, 10-17
Redesign Option, 12-5
Redesign DT Option, 12-6
Redo and Undo, 2-6 Relative to a line Angle, 5-2 Length, 5-2 X-Coordinate, 5-2 Y-Coordinate, 5-2 Z-Coordinate, 5-2
Rename Joint, 5-6 Plate, 7-2
Reorder Joint, 5-6
Report All above, 11-3 Contents, 11-3 Load, 11-3 Member, 11-1 Model info, 11-3 Plate Offset, 11-2 Plate, 11-1 Property Library, 11-3 Member group, 11-2 Member section, 11-2 Plate group, 11-2 Plate stiffener, 11-2 Property, 11-2 Shell, 11-2 Sum by IDs, 11-3 Summation, 11-3 Text file, 11-3
Section Concrete, 8-11
Select Display, 4-3
Select load condition Dynamic mass, 12-3 Option, 12-3 P-delta, 12-4 Standard, 12-3
Report, 11-1
Select view
Joint, 11-1 Member Offset, 11-1
Plot, 3-3
Set to default Member, 6-6 Plate, 7-3
Reset select Display, 4-4
Settings, 3-2 Shell
Reset volumes Display, 4-3
B-6
Precede Report, 11-2
Undo and Redo, 2-6 Unity check Range
Shell Display, 4-7 Full size, 4-7 Local CS, 4-7 Name, 4-7
Option, 12-5
Unzoom Display, 4-16
User label
Shell element
Dimension, 4-18
Plate, 7-4
Show in 3D
V
Display, 4-12
Skid
Vertical
Load, 9-9
Distance, 4-18
Slab group
View
Concrete, 8-15
Active/Isometric, 4-1 Delete, 4-17 Display, 4-16 Rename bin, 4-17 Save, 4-17 Select, 4-17
Slab rebar Concrete, 8-16
Special Display, 4-9 Dummy structure, 4-9 Members w/o properties, 4-9 None, 4-9 Out of plane offsets, 4-9 Rows & elevations, 4-9 Through member, 4-9
Views Plot, 3-3
W
Specified deflection
Widnows Clipboard
Load, 9-2
Export, 3-4
Specifying leg data, 2-3 Spring
Windows metafile Export, 3-4
Joint, 5-12
Wishbone
Start modeling, 2-1 Straight
Member, 6-2
Leader type, 4-19
String
X
Member, 6-2
Structure
X-brace Member, 6-2
Generate a jacket, 2-1 Grouted, 2-2 Non-grouted, 2-2
XY plane Display, 4-2
Sum by IDs
XY volume
Report, 11-3
Display, 4-2
Summation
XZ plane
Report, 11-3
Display, 4-2
System configuration, 1-1
XZ volume Display, 4-2
T
Y
Text file Report, 11-3
YZ plane
Title
Display, 4-2
Miscellaneous, 13-1 Plot, 3-3
YZ volume Display, 4-3
To end Leader type, 4-20
Z
Translate/Rotate About a line, 5-9 General, 5-8 Joint, 5-7 Mirror image, 5-8
Zoom box Delete element, 4-12 Delete joint, 4-12 Delete member, 4-12 Delete plate, 4-12 Display, 4-12 Increment joint, 4-12 Joint design, 4-16 Translate/Rotate, 4-12 Zoom display, 4-12
True Distance, 4-18
U Unbraced length, Lb Property, 8-9
B-7
Precede
B-8
