Composite Girder - Tutorial Midas Civil

midas Civil Composite Prestressed Girder Bridge

Bridging Your Innovations to Realities

Contents: Introduction Modeling Features Analysis Control Results

2

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Construction Stage Analysis

1. Introduction

Prestressed Composite Girder Bridge


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1. Introduction

Elevation

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1. Introduction

Side View

Plan

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1. Modeling  Section Definition: : 1. 2. 3. 4.

Prestressed Composite Section Rectangular section Tapered Section Circular section

Prestressed Composite sections will be used to model the stiffness of the deck and the girder in the Longitudinal direction. Rectangular sections will be used to provide transverse stiffness provided by the deck. Tapered section will be used to model the pier cap. Circular sections will be used to modelthe pier.

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1. Modeling Setting of Units:

Tools -> Unit System

1. Length -> mm 2. Force -> N 3. Click -> OK


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1. Modeling  Defining sections: Model>Properties>Section 1

1. Click Add 2. Go to Composite Tab

2 3 4 5 6

3. Name -> Precast Composite

7

4. Section Type -> Composite – I 8

5. Slab width -> 15000 6. Girder: Num: 5

9

7. CTC: 3000

8. Bc -> 3000 Tc -> 200 Hh -> 20 9. Symmetry -> Check on

10 12

10. HL1 > 200 HL2 > 300 HL3 > 500 HL4 > 300 HL5 > 200 BL1 > 100 BL2 > 500 BL4 > 300. 11.Click -> Select Material from DB..

11

13

14

12.Select Code -> ASTM ( RC) 13.Name -> Grade C4000 14.Code -> ASTM ( RC) 15. Name -> Grade C5000 16. Click -> Ok 17.Click -> OK

15 16

17

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1. Modeling  Defining sections: 1

3

Model>Properties>Section

2 4

1. Click Add 2. Name -> Transverse Beams 3. Type -> Solid Rectangle 4. Select -> User 5. H -> 200 B -> 1000

5

6. Click -> OK 7. Similarly add one more section with B=1000 and H = 1000 with name Diaphragm

6

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1. Modeling  Defining sections: 2 1

Model>Properties>Section

4 3

1. Click Add

5

2. Go to Tapered Tab 3. Name ->Pier Cap 6

4. Type -> Solid Rectangle 5. Select -> User 6. H ->1000B -> 2000 7. H -> 2000 B -> 2000

7

8. Z – axis variation -> Linear 9. Click Change offset 10. Offset -> Centre-top

8

11.Click -> OK 12.Click -> OK

10

9 12 11

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1. Modeling  Defining sections: Model>Properties>Section 1. Click Add 2. Name -> Pier

1

3 2 4

3. Type -> Solid Rectangle

4. Select -> User 5. D -> 2000 6. Click -> OK 5

6

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1. Modeling  Definition of Material : Model>Properties>Material 1. Click Add

3 1

2

2. Type of Design -> Concrete 3. Name -> Grade C4000

4

4. Standard -> ASTM ( RC)

5

5. DB -> Grade C4000 6. Click -> OK

6

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1. Modeling  Definition of Material : 3

Model>Properties>Material 1. Click Add

1

2

2. Type of Design -> Concrete 3. Name -> Grade C5000

4. Standard -> ASTM ( RC)

4 5

5. DB -> Grade C4000 6. Click -> OK

6

**Open file Comp_File1 .mcb if not completed till now.

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1. Modeling  Grillage Model 1

Model>Structure Wizard -> Beam

2

1. Type 1

3

2. Distance -> 100@1000 3. Click -> Add

4. Material -> 2 5. Section -> 1 6. Click -> OK

4 5

6

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1. Modeling  Grillage Model

Model>Element -> Translate 1. Click ->

3

to select all the beam elements

2. dx,dy,dz -> 0,3000,0

3. Number of Times -> 4 4. Click -> Apply

2 3

4

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1

Model>Element -> Create Elements 1. Click ->

to obtain node numbers

2. Element Type -> General Beam/ Tapered beam

2

3. Material -> 1 Grade C4000 4. Section -> 2 : Transverse Beams 5. Select the Top View by

6. Select the nodes 1 , 102, 203, 304 , 405

3 4

5

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Model>Element -> Translate 1. Click ->

to select recently created

elements 2. dx,dy,dz -> 1000,0,0 3. Number of Times -> 100 4. Click -> Apply 5. Intersect -> Node , Elements 6. Click -> Apply

2 3

4

5

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1

1. Select the Elements 501 to 504, 701 to 704 and 901 to 904

2. Drag And Drop the Section Diaphragm to change the section

2

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Model>Nodes -> Translate

1

1. Select Nodes 51, 152, 253, 354, 455 by typing in the node selection field 2. dx,dy,dz -> 0,0,-1350 3. Number of Times -> 1 4. Click -> Apply

2 3

4

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Model>Element -> Create Elements 1. Click ->

to obtain node numbers

2. Element Type -> General Beam/ Tapered beam 3. Material ->2: Grade C5000

2

4. Section -> 3: Pier Cap 5. Nodes -> 506 508

6. Nodal Connectivity -> Nodes 510 508 6 3 4

5

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Model>Properties -> Tapered Section Group 1. Group Name -> tap 1

1 2

2. Element List -> 905 906 3. Click -> Add

4. Group Name -> tap 2 5. Element List -> 907 908 6. Click -> Add

3

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Model>Nodes -> Translate 1. Select Node 508 by typing in the

1

selection filed. 2. dx,dy,dz -> 0,0,-500 3. Number of Times -> 1 4. Click -> Apply 2 3

4

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1. Modeling  Grillage Model Model>Elements -> Extrude 1. Select Node 511 by typing in the selection filed.

2

2. Extrude Type -> Node to Line Element 3. Material -> 1: Grade C5000

4. Section : 5: Pier

3

5. dx,dy,dz -> 0,0,-1000

4

6. Number of Times -> 8 7. Click -> Apply

5 6

**Open Model file Comp_File 2.mcb 2

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1. Modeling Go to Group Tab In the tree menu Adding Groups: 1. Right Click on the Structure Group and select New 2. Name -> Girders Similarly define the following groups: Structure:  Transverse beams  Pier Boundary  Supports  Bearings

Load :  Self Weight  Wet Concrete  Scaffolding  Prestressing 1  Prestressing 2  Barrier  Wearing Course

**Open Model file Comp_File 3.mcb

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1. Modeling  Defining Supports

Model>Boundaries -> Supports

12

1. Select the Node 405 and D-ALL 2. Boundary Group -> Supports 3. Click -> Apply 4. Select the Nodes -> 1, 102, 203, 304 5. Select Dx and Dz 6. Click -> Apply 7. Select the nodes -> 101,202,303,404,505 8. Select -> Dz 9. Click -> Apply 10. Select node -> 519 11. Select Dall Rall 12. Click -> Apply

3

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1. Modeling Bearings

1

Model>Boundaries -> Elastic Links 2

1. Boundary Group -> Bearings 2. Type -> General 3. SDx -> 1e10

4. SDy -> 1e7 3 4 5

5. SDz -> 1e7 6. 2 Nodes -> 510, 455 7. Apply 8. Copy Elastic Link 9. Axis -> y 10. Distance -> 3000 11. 2 Nodes -> 506,51

6

12. 2 Nodes -> 508,253 13.Uncheck -> Copy Elastic Link 14. 2 Nodes -> 455 ,510 15. Type -> Rigid 16. Nodes -> 508, 511

**Open Model File Comp_File 4.mcb

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1. Introduction Flow Chart of Construction Stage Analysis:

Modeling of Structure

Defining Structure Groups

Defining Loads under Load Group

Defining Boundary under Boundary Groups

Generation of Construction Stages

Defining Construction Stage Data

Construction Stage Analysis Control


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1. Modeling Modeling of tendons Load -> Prestress Loads -> Tendon Property 1. Click Add

2 3

4

11

2. Name -> Tendon

12 15

3. Tendon Type -> Internal ( POST –Tensioned) 4. Material -> click on 5. Click -> Add 6. Type of Design -> Steel 7. Name -> Tendon 8. Standard -> ASTM (S) 9. DB -> A501 10.Click -> OK

16

11. Select Material 3: Tendon 12. Tendon Total Area -> Click on

13. Number of Strands -> 12 14.Click -> Ok 15. Duct Diameter -> 100 16. Click -> OK

13 14

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1. Modeling Tendon Location

Centroid of section

Web Tendon Bottom Tendon

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1. Modeling Defining Bottom Tendon Profile Load -> Prestress Loads -> Tendon Profile 1. Click Add 2. Tendon Name -> Bot Tendon

2 3 4 5

3. Tendon Property -> Tendon 4. Input type -> 3D 5. Curve Type -> Spline

11

6. Coordinates : 7. Profile Insertion Point -> End I of Element 1

8. Click -> OK 9. Select Tendon -> Bot Tendon 10.Click -> Copy/Move

6 12

11. Select New Assigned Elements

13

12. Assigned Elements -> 101 to 200

14

13. Insertion Element -> 101 14. Click -> Add

7

15. Repeat for elements 201 to 300, 301 to 400 , 13

401 to 500 with insertion elements 201, 301, 401 respectively 16.Click -> OK

8

14

15

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1. Modeling Defining Web Tendon Profile 2 4 5

Load -> Prestress Loads -> Tendon Profile

6

1. Click Add 2. Tendon Name -> Web Tendon 3. Tendon Property -> Tendon 4. Assigned Elements -> 1to 100 5. Input type -> 3D 6. Curve Type -> Spline 7. Coordinates :

7

8. Profile Insertion Point -> End I of Element 1

8

9. Click -> OK

9

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1. Modeling Defining Web Tendon Profile

Load -> Prestress Loads -> Tendon Profile 1. Select Tendon -> Web Tendon 2. Mode -> Copy

3

3. Select New Assigned Elements 4. Assigned Elements -> 101 to 200

5. Insertion Element -> 101 6. Click -> Add 7. Repeat it for Elements 201 to 300, 301 to 400, 401 to 500 with insertion element 201, 301 , 401

4 5 6

8. Click -> OK 8

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1. Modeling Defining Static Load Cases 1 2

Load -> Static Load Cases

1. Name -> Self Weight 2. Type -> Dead Load 3. Click -> Add 4. Similarly Add:

**Open File Comp_File 5.mcb

3

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1. Modeling Defining Loads 1

Load -> Self Weight

2

1. Load Case Name -> Self Weight 2. Load Group Name -> Self Weight 3. Z -> -1 4. Click -> Add 5. Click -> Close

3

4

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1. Modeling Defining Loads

Load -> Element Beam Loads 1. Load Case Name -> Wet Concrete 2. Load Group Name -> Wet Concrete

8

11

3. Load Type -> uniform Loads 4. Direction -> Global Z 5. Value -> x1 -> 0 w -> -15 6. Select -> x

1 2 3

7. Select the Side View

10 7

8. Click on 9. Select the Superstructure 10.Click -> Apply 11. Select Pervious

12. Similarly apply Scaffolding load with w = -3

4 5

13. Load Case Name -> Wearing Course 14. Load Group Name -> Wearing course 15. Select -> None 16. Select Superstructure again 17. w -> -3 18. Click -> Apply

6

15

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1. Modeling Defining Loads Load -> Element Beam Loads 1. Load Case Name -> Barrier

11

2. Load Group Name -> Barrier 3. Load Type -> uniform Loads 4. Eccentricity -> Centroid 5. Direction -> Global Y

1 2 3

12

6. I –end -> 1400

10

7. Direction -> Global Z 8. Value -> x1 -> 0 w -> -10 9. Select -> x

14

4 5 6

10.Select the Top View

7

11. Click on

8

12. Select Left most exterior Girder 13.Click -> Apply

13

14. Select -> Right Most Exterior Girder

15. I – end -> -1400 16. Click -> Apply

9

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1. Modeling Tendon Prestress Loads Load -> Prestress Loads -> Tendon Prestress Loads

1

1. Load Case Name ->Prestressing 1 2. Load Group Name -> Prestressing 1

2

3. Select All tendons with Prefix -> Bot – Tendon 4. Stress Value -> Stress

3

5. 1st jacking : Begin

6. Begin -> 1300 N/mm2 7. Click -> Add 8. Load Case Name ->Prestressing 2

4

9. Load Group Name -> Prestressing 2

5

10.Select All tendons with Prefix -> Web Tendon

6

11.Stress Value -> Stress 12.1st jacking : Both 13. Begin -> 1300 N/mm2 End -> 1300 N/mm2 14.Click -> Add 15.Click -> Close 7

** Open Model Comp_File 6.mcb

15

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1. Modeling Construction Stages

Casting of Deck 0

20

Stage 1

Scaffolding Removed

Open to Traffic

Wearing Course + Barrier

30

60

Stage 2

90

Stage 3

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1. Modeling Modeling Construction Stages

Stage 1: Non Composite Section

Stage 2: Composite Section

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1. Modeling Modeling Construction Stages Simple Supported Girders Stage 1


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1. Modeling Applying Beam End Release to Simulate the Simply Supported Nature In stage 1

1

4

Model -> Boundaries -> Beam End Releases

1. Click on

2

3

besides the boundary group name

2. Name -> Temp 3. Click -> Add 4. Select Boundary Group -> Beam End Release 5. Select My J-Node 6. Select elements 50,150,250,350,450 by typing in element selection field. 7. Click -> Apply 5

6

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1. Modeling Assign Structure Groups

4

1. Go to Group Tab of Tree Menu

2

2. Select the Elements by section select section

3. Select sections 1: Precast Composite and 4: Diaphragm 4. Click -> Close 5. Drag and Drop Group Girders

3

6. Select sections -> 5. Pier and 3: Pier Cap and drag and drop Structure Group Pier 7. Select sections 2: Transverse Beams 8. Drag and Drop Structure Group Transverse Beams

4

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1. Modeling Modeling Construction Stages Load -> Construction Stage Analysis Data -> Define Construction Stage 1. Click-> Add 2. Name -> Stage 1 3. Additional Steps : Day 20 4. Click -> Add 5. Save Result -> Stage 6. Element Tab 7. Select Girders 8. Age -> 7 9. Click -> Add 10.Select -> Pier 11.Age -> 30

12.Click-> Add 13. Enter data for Boundary Tab and Load Tab 14.Click-> ok


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Load -> Construction Stage Analysis Data -> Define Construction Stage 1. Click-> Add 2. Name -> Stage 2 3. Save Result -> Stage 4. Element Tab 5. Select Transverse Beams 6. Enter data for Boundary Tab and Load Tab 7. Click-> ok


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Load -> Construction Stage Analysis Data -> Define Construction Stage 1. Click-> Add 2. Name -> Stage 3 3. Save Result -> Stage 4. Enter data for Boundary Tab and Load Tab 5. Click-> OK


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1. Modeling Composite Section For Construction Stage modeling

2

Load -> Construction Stage Analysis Data -> Composite Section For Construction Stages 1. Click-> Add 2. Section -> 1: Precast Composite 3. Part 1 -> material -> 2: Grade C5000 Composite Stage -> Stage 1 Age -> 7 4. Part 2 -> material -> 1: Grade C4000

3 4

Composite Stage -> Stage 1 Age -> 10 5. Click-> Ok

5

Open Model Comp_File 7.mcb

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1. Modeling Time Dependent Material Definition Model -> Properties -> Time

2

3

Dependent material

4

(Creep/Shrinkage)

5

1. Click-> Add 2. Name -> C5000 3. Code -> CEB-FIP(1990) 4. Characteristic Compressive strength -> 50 5. Notational Size -> 100 6. Click-> Ok

8

9

7. Click-> Add 8. Name -> C4000 9. Code -> CEB-FIP(1990) 10.Characteristic Compressive strength -> 40 11.Notational Size -> 100 12.Click-> Ok

10 11

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1. Modeling Time Dependent Material Definition

Model -> Properties -> Time Dependent material

(Compressive Strength) 1. Click-> Add 2. Name -> C5000 3. Code -> CEB-FIP 4. Mean Compressive strength -> 58 5. Click-> Ok 6. Click-> Add 7. Name -> C4000 8. Code -> CEB-FIP 9. Mean Compressive strength -> 48 10.Click-> Ok


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1. Modeling Time Dependent Material Link – Linking Material to the Time dependent properties

Model -> Properties -> Time

Dependent material Link 1. Creep/Shrinkage -> C4000 2. Comp Strength -> C4000 3. Select Material -> Grade C4000 4. Click-> Add 5. Creep/Shrinkage -> C5000 6. Comp Strength -> C5000 7. Select Material -> Grade C5000 8. Click-> Add

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1. Modeling Time Dependent Material Link – Linking Material to the Time dependent properties

Load -> Construction Stage Analysis Data -> Composite section for Construction Stage 1. Click-> Update All H

**Open Model Comp_File8.mcb

Cable Stayed Bridge


2. Moving Load Analysis 3 Step Process

Step 1 Select Live Load Code

Step 2

Step 3

Define Traffic Line Lane or Traffic Surface Lane

Define Standard Vehicular Load or User-defined Vehicular Load

Cable Stayed Bridge

2. Moving Load Analysis


Cable Stayed Bridge

2. Moving Load Analysis Cross beam Group


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1. Modeling Moving Load Analysis

Load -> Moving Load Analysis Data -> Moving Load Code 1. Select -> AASHTO LRFD


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1. Modeling Moving Load Analysis Load -> Moving Load Analysis

2

Data -> Traffic Line Lanes 1. Click -> Add 2. Lane Name -> Lane 1 3. Eccentricity -> 0

3

4. Vehicular Load Distribution -> Cross Beams 5. Select -> Transverse Beams

4 5

6. Select 2 points as Node 102 to 202 7. Click -> ok 8. Click -> Add

6

9. Lane Name -> Lane 2 10.Vehicular Load Distribution ->

Cross Beams 11.Select -> Transverse Beams 12.Select 2 points as Node 304 to 404 13.Click -> ok

7

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2

3 4

Load -> Moving Load Analysis Data ->

5

Vehicles 1. Click -> Add Standard 2. Standard name -> AASHTO LRFD Load 3. Vehicular Load Name -> HL-93TRK 4. Vehicular Load Type -> HL-93TRk 5. Dynamic Load Allowance -> 33 6. Click -> ok 6

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1. Modeling Moving Load Analysis 2

Load -> Moving Load Analysis Data -> 5

Moving Load Case 1. Click -> Add

6 7

2. Load Case Name -> Moving 3. Loading Effect -> Combined 4. Click -> Add 5. Vehicle Class -> VL:HL-93TRK

8 3

6. Min number of loaded lanes -> 1 7. Max Number of Loaded lanes -> 2

9

8. Selected lane 1 and lane 2 9. Click -> ok

10.Click -> ok

4 10

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Analysis -> Run Analysis


Thanks

Composite Girder - Tutorial Midas Civil

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