NSCP 2015 SEISMIC ANALYSIS (STATIC FORCE PROCEDURE)Full description
NSCP 2015 SEISMIC ANALYSIS (STATIC FORCE PROCEDURE)Full description
NSCP 2015 SEISMIC ANALYSIS (STATIC FORCE PROCEDURE)
Seismic Analysis for Buried StructureFull description
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Full description
Manual book how to process seismic data using promax feature
This report presents a summary of the current state of seismic analysis and design for underground structures. The report describes approaches used by engineers in quantifying the seismic effect. ...
Performance based design explicitly evaluate how a building is likely to perform given the potential hazard it is likely to experience , considering uncertainties inherent in the quantification of potential hazard and uncertainties in assessment of t
Manual book how to process seismic data using promax featureFull description
Full description
Lecture delivered by Prof. Ant. N. Kounadis, Chairman of the Academy of Athens
SEISMIC ANALYSIS USING LUMPED MASS METHOD
STEPS INVOLVED: 1. Creation of Geometry 2. Giving Member Property 3. Support Condition 4. Giving Loads : Load 1 Dead Load Load 2 Live Load 5. Specifying Analysis Type 6. Post Analysis Print 7. Design 8. Analysis. (1) In this complete steps steps 1 to 6. Then follow the further steps for Lumped Mass. There are two parts. Part 1 : Finding Joint Loads for Earth quake analysis. Part 2: Applying Earthquake analysis. Before Proceeding take a copy of Model created from step 1 to 6.
Part 1: To find Joint Loads:
1.To give pinned supports at column nodes except base nodes: Main menu
Select
Beams parallel to
Y
Main menu View View selected objects only.
Main menuCommands
Support
specifications
Pinned
Assign.
2. Apply Load: (1) In Seismic Load for finding joint load we have to consider the following Load case as per Table 8 (Clause 7.3.1 )of IS 1893-2002. 1.0DL+0.25LL (If LL<3KN/m2) 1.0DL+0.50LL Main menu
(If LL>3KN/m2)
Edit Edit
input command file
In Load case below Live Load type the following: Load Combination 3 1 1 2 0.25 Perform Analysis Load List 3 Print Support Reaction (2) Main Menu Analysis (3) Main Menu View
Run Analysis
Tables
Done.
□ Support Reaction.
From support reaction Select only Joint No. and Force FY. Copy and Paste the Joint No. and vertical reaction at the pinned supports in a separate file named as “Joint Load “file.
Type Weight in between Joint No. and Fo rce Fy as below: 16 WEIGHT 81.47 Close the File. Part 2 : Applying Earthquake Analysis: Go to original file of Model created from step 1 to 6. Then follow the steps below: DEFINING SEISMIC LOAD: 1. Main menu 2002
CommandsLoading
DefinitionsSeismic Load IS1893-
2.Seismic Parameter screen will appear. Select type:IS1893-2002.
□ Include Accidental Load □ Generate . 3. IS1893-2002 Seismic Parameter screen will appear. Select city or Zone. For Zone III Z=0.16 (Table 2 IS1893-2002) Response Reduction Factor (RF) : (Table 7 IS1893-2002) : 5 for SMRF : 3 for OMRF Importance Factor (I)
: (Table 6 IS1893-2002) : 1 for Ordinary Residential Building : 1.5 for Important Building
Other Factors: Rock or Soil sites Factor (SS) : (Clause 6.4.5 of IS1893-2002) : 1 for hard soil (N>30) : 2 for medium soil (10≤ N ≤ 30) for all soils. : 3 for soft soils (N< 10) Type of Structure (ST) (Optional) : (Clause 7.6 IS1893-2002) =1 for RC Frame Building
= 2 for Steel Frame Building = 3 for all other Building Damping Ratio (DM) (Table 3 IS1893-2002): 0.05% PX =Period in X Direction (Optional): PZ =Period in Z Direction (Optional): □ Generate
Add
Close.
4. Go to “ Joint Load” file .Copy the Joint Weight and apply them as Seismic Weights. For this go to Main menu
Edit
Edit Input Command file.
Below the Zone factor, copy and paste the JOINT WEIGHT as in the Joint Load file.
1. Edit the Load case No.1 (Dead Load) and 2(Live Load) as Load case No. 5 & 6. 2. APPLYING SEISMIC LOAD: (1) Click Load case details in the Data Area
Add.
Number: 1 Loading Type: Seismic Tittle : Seismic X +ve
Add.
Click Load Case 1
Seismic Load
X Direction. Factor 1
Add
Add.
Close.
(2) Click Load case details in the Data Area
Add.
Number: 2 Loading Type: Seismic Tittle : Seismic X -ve
Click Load Case 2
Add
Seismic Load
X Direction. Factor:- 1
Add.
Add.
Close.
(3) Click Load case details in the Data Area
Add.
Number: 3 Loading Type: Seismic Tittle : Seismic Z +ve
Add.
Click Load Case 1
Seismic Load
Z Direction. Factor 1
Add
Add.
Close.
(4) Click Load case details in the Data Area
Add.
Number: 4 Loading Type: Seismic Tittle : Seismic Z -ve
Add.
Click Load Case 4
Seismic Load
Z Direction. Factor: - 1
Add
LOAD COMBINATION: Main menu
Load Combinations
Add.
Close.
Loading No.7 Name: 1.5(DL+LL) Default: 1.5 Available Load case
Load
Factor
cases 1. EQX+ve
>
5
1.5
2. EQX-ve
>>
6
1.5
3. EQZ+ve
<
4. EQZ-ve
<<
5. DL 6. LL Add
Loading No.8
Name: 1.5(DL+EQX+ve) Default : 1.5
Available Load case
Load
Factor
cases 1. EQX+ve
>
5
1.5
2. EQX-ve
>>
1
1.5
3. EQZ+ve
<
4. EQZ-ve
<<
5. DL 6. LL Add In the similar way add the following load combination. Load case No.
9
10
11
12
13
14
15
16 17
Load case
Factor
5
1.5
2
1.5
5
1.5
3
1.5
5
1.5
4
1.5
5
1.2
6
1.2
1
1.2
5
1.2
6
1.2
2
1.2
5
1.2
6
1.2
3
1.2
5
1.2
6
1.2
4
1.2
5
0.9
1
1.5
5
0.9
18
19
Add
2
1.5
5
0.9
3
1.5
5
0.9
4
1.5
Close.
(OR)
AUTO LOAD COMBINATION Main menu
Commands
Loading
Edit
Auto Loads
Select Indian
Code Select : New category say EQ No. of rule :4 Rule No.
Dead
Live
Seismic
1
1.5
1.5
--
2
1.5
--
1.5
3
1.2
1.2
1.2
4
0.9
---
1.5
Click Update Table
Close.
Click Load case details
side). Select
: Indian code
Add
High light Auto Load Combination (in left
Category:
EQ
Generate loadsAdd Close.
Main menuCommandsLoading Load List (selecting Design loads)
