manual de Linear Time History Analysis V7.2.1

1. midas Gen Training Series Linear Time History Analysis
Linear Time History Analysis OverviewOverviewLinear Time History Analysis OverviewOverview
Linear Time History Analysis
Model
- Unit : kN, mUnit : kN, m
- Beam, Truss Element
- Mass
Load & Boundary Condition
Self Weight- Self Weight
- Floor Load
- Time history load
- Support
Analysis
- Eigenvalue analysis
- Linear modal time history analysis
Result EvaluationResult Evaluation
- Displacement/Velocity/Acceleration
- Member forces
- Time history graph
Program Version V7.2.1
1 MIDAS Information Technology Co., Ltd.
Program License Registered, Trial
Revision Date 2007.11 .12

2. midas Gen Training Series Linear Time History Analysis
Step 1. Define material properties.p f p p
1. Model > Properties > Material
2. Name: A53
2
3. Type of Design: Steel
4. Standard: ASTM(S)
5. DB: A53
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3 4
6. Click [OK] Button.
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3. midas Gen Training Series Linear Time History Analysis
Step 2. Define section properties. 1 Model > Properties > Sectionp f p p
2
1. Model > Properties > Section
2. DB: AISC2K(US)
3. Sect. Name: W18x97
4 Click [Apply] Button
3
4. Click [Apply] Button.
5. Sect. Name: W14x109
6. Click [Apply] Button.
7. Sect. Name: W6x207. Sect. Name: W6x20
8. Click [OK] Button.
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4. midas Gen Training Series Linear Time History Analysis
Step 3. Create elements (1)p ( )
1. Model > Structure Wizard > Frame – “Input” tab
2. Distance: 8, Repeat: 3, p
3. Click [Add X-Coord.] Button
4. Distance: 6, Repeat: 4
5. Click [Add Z-Coord.] Button
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3 5
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5. midas Gen Training Series Linear Time History Analysis
Step 3. Create elements (2)p ( )
1. Model > Structure Wizard > Frame – “Edit” tab
2. Click [Generate Frame] Button.[ ]
3. Beta Ang.: 90 Deg.
4. Material: 1: A53
5. Section: 1: W18x97
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6. midas Gen Training Series Linear Time History Analysis
Step 3. Create elements (3)p ( )
1. Model > Structure Wizard > Frame – “Insert” tab
2. Insert Point: 0,0,5
3. Alpha: -90
4. Click [OK] Button.
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7. midas Gen Training Series Linear Time History Analysis
Step 3. Create elements (4)p ( )
1. Model > Elements > Extrude Elements…
2. Extrude Type: Node -> Line Element
3. Material: 1: A53
4. Section: 2: W14x109
5. Beta Angle: 90
6. dx, dy, dz: 0,0,-5
2
7. Number of Times: 1
8. Select all the nodes by clicking .
9. Click [Apply] button.
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8. midas Gen Training Series Linear Time History Analysis
Step 3. Create elements (5)p ( )
1. Model > Elements > Create Elements
2. Element Type: Truss
3. Material: 1: A53
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4. Section: 3: W6x20
5. Nodal Connectivity: 26, mid point between node 6
and 7
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9. midas Gen Training Series Linear Time History Analysis
Step 3. Create elements (6)p ( )
1. Model > Elements > Create Elements
2 N d l C ti it 27 412. Nodal Connectivity: 27, 41
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10. midas Gen Training Series Linear Time History Analysis
Step 3. Create elements (7)p ( )
1. Model > Elements > Create Elements
2. Nodal Connectivity: 30, mid point between node 10y , p
and 11
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11. midas Gen Training Series Linear Time History Analysis
Step 3. Create elements (8)p ( )
1. Model > Elements > Create Elements
2 N d l C ti it 31 422. Nodal Connectivity: 31, 42
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12. midas Gen Training Series Linear Time History Analysis
Step 3. Create elements (9) 1 M d l B ildi B ildi G i
p ( ) 1. Model > Building > Building Generation
2. Number of Copies: 4
3. Distance (Global Z): 3.5
4 Cli k [Add] b tt
2
4. Click [Add] button.
5. Select all the nodes & elements by clicking .
6. Click [Apply] button.
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13. midas Gen Training Series Linear Time History Analysis
Step 4-1. Assign story data.p g y
1. Model > Building > Story…
2. Click [Auto Generate Story Data…] Button.
3. Click [OK] Button.
4. Click [Close] Button.
5. Click in the “Frequently used” toolbar.
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14. midas Gen Training Series Linear Time History Analysis
Step 4-2. Assign boundary conditions. 1. Model > Boundaries > Supportsp g y 1. Model Boundaries Supports
2. Check on “D-ALL”
3. Click on .
4. Plane: XY Plane
5. Z Position: 0 (Click any node whose Z coordinate
is zero in the Model View. Node No. 21 to 40
are selected.)
6 Click [Apply] Button6. Click [Apply] Button.3
2 4
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15. midas Gen Training Series Linear Time History Analysis
Step 5-1. Define static load cases.p f
1. Load > Static Load Cases
2. Name: DL, Type: Dead Load (D)
3 Click [Add] Button
2
3
3. Click [Add] Button.
4. Name: LL, Type: Live Load (L)
5. Click [Add] Button.
6. Click [Close] Button.6. Click [Close] Button.
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16. midas Gen Training Series Linear Time History Analysis
Step 5-2. Assign self weight.p g f g
1. Load > Self Weight
2. Load Case Name: SW
3. Self Weight Factor, Z: -1
4. Click [Add] Button
5. Click [Close] Button
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17. midas Gen Training Series Linear Time History Analysis
Step 5-3. Define floor loads.p f f
1. Load > Define Floor Load Type…
2. Name: Retail
2
3. Load Case: DL, Floor Load: -2.4
4. Load Case: LL, Floor Load: -4.8
5. Click [Add] Button.
6 Cli k [Cl ] B tt
3
4 6. Click [Close] Button.4
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18. midas Gen Training Series Linear Time History Analysis
1. Load > Assign Floor Loads…
Step 5-4. Assign floor loads. 9
2. Load Type: Retail
3. Distribution: One way
4. No. of Sub Beams: 2
p g f
5. Sub-Beam Angle (A2): 90
6. Unit Self Weight: 10
7. Check on “Copy Floor Load”.
8 Di 4@3 5
2
3
10
8. Distances: 4@3.5
9. Click on .
10. Active Identity: Story, 2F, +Below
11 Click [Active] button11. Click [Active] button.
12. Click on “Nodes Defined Loading
Area” first and click node No.
17,1,4,20 and 17 consecutively.
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19. midas Gen Training Series Linear Time History Analysis
Step 6. Create mass data.p
1. Model > Structure Type…
2. Lumped Mass: Convert to X, Y
3. Click [OK] Button.
4. Model > Masses > Load to Masses…
5. Mass Direction: X, Y
6. Load Case: DL, Scale Factor: 1
2
7. Click [Add] Button.
8. Click [OK] Button.
9. Query>Story Mass Table…
3
Convert self weight
into messes
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6
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Convert dead load
into messes

20. midas Gen Training Series Linear Time History Analysis
Step 7-1. Define time history load casep f y
1. Load > Time History Analysis Data>Time History
Load Cases…2
2. Name: TX
3. Enter all the data referring to the left dialog.
4. Click [OK] Button.
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21. midas Gen Training Series Linear Time History Analysis
Step 7-2. Create time history function.p y f
1. Load > Time History Analysis Data>Time Forcing
Functions…
2. Click [Add Time Function] Button.
2
[ ]
3. Click [Earthquake] Button.
4. Click [OK] Button.
5. Click [OK] Button.
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22. midas Gen Training Series Linear Time History Analysis
Step 7-3. Create ground acceleration.p g
1. Load > Time History Analysis Data> Ground
Acceleration…
2. Time History Load Case Name: TX
2
3. Function for Direction-X: Elcent_h
4. Angle of Horizontal Ground Acc.: 0
5. Click [Add] Button.
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3
6. Click [Close] Button.
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23. midas Gen Training Series Linear Time History Analysis
Step 8. Define eigenvalue analysis control data.p f g y
1. Analysis > Eigenvalue Analysis Control…
2. Number of Frequencies: 15
3. Click [OK] Button.
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Step 9. Perform analysis.
1 Analysis > Perform Analysis1. Analysis > Perform Analysis
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24. midas Gen Training Series Linear Time History Analysis
Step 10-1. Check displacement/Velocity/Acceleration.p p y
1. Results > Time History Results > Disp/Vel/Accel…
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25. midas Gen Training Series Linear Time History Analysis
Step 10-2. Check member forcesp f
1. Results > Time History Results > Force Diagram (Beam/Truss/General Link)…
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26. midas Gen Training Series Linear Time History Analysis
Step 10-3. Create time history graph (1)
1. Results > Time History Results > Time History Graph…
2. Click [Define/Modify Function] button.p y g p ( ) [ y ]
3. Click [Add New Function] button.
4. Name: 132-DX
5. Node Number: 132
2
6. Type of Result: Displ.
7. Reference Point: Ground
8. Components: DX
3
9. Click [OK] button.
10. Click [Back] button.
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27. midas Gen Training Series Linear Time History Analysis
Step 10-3. Create time history graph (2)p y g p ( )
1. Select “132-DX”.
2. Click [Add from List] button.1
3. Horizontal Axis: Time
4. Click [Graph] button.
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