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EAS254/3 - STRUCTURAL ANALYSIS
Computer Software for Structural Analysis by Aslam Kassimali
Introduction:
- This computer software only designed to analyze 2-D plane structures.
- The structures can be analyzed including plane trusses, continuous beams, and
plane frames.
- The analysis of structures is based on Matrix Stiffness (Displacement) Method.
- This software is using basic Imperial Units. E.g. ft (length), k/ft2 (moduli of
elasticity), ft2 (cross-sectional area), ft
4 (moment of inertia), kips (joint force), k-ft
(moment), and k/ft(uniformly distributed load).
- The input data consist of following:-
o General Structural Data
o Joint Coordinates and Supports
o Material Properties
o Cross-Sectional Properties
o Member Data
o Joint Loads
o Uniformly Distributed Load on Frame and Beam Members
o Support Settlements, Temperature Changes and Fabrication Errors
- The output of analysis results may consist of following:-
o Joint Displacements
o Member Axial Forces (for truss) or Member End Forces in Local
Coordinates (for beam and frame)
o Support Reactions
A. Analysis of Truss
Check: Horizontal Displacement at point C ∆C= 0.13 ft →
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1. Starting Computer Software
Start > All Programs> Structural Analysis 3.0 by A. Kassimali
Click I Agree – Continue.
2. Creating New Model
Project > New Project
Enter project title as Truss
Select structural type as Plane Truss and click OK
3. Define Joint Coordinates and Supports
Click Joints
Key in X-Coordinate, Y-Coordinate, and Restraints for each joints as tabulated
in below:
Joint X-Coordinate Y-Coordinate Restraints
A 1 0 0 X, Y
B 2 4 0 Y
C 3 9 12 -
Click OK after finish input the data
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4. Define Material Properties
Click Materials
Enter modulus of elasticity E as 1440000
Enter Co-eff. of thermal expansion as 0
Click OK
5. Define Cross-sectional Properties
Click Cross-sections
Enter Area A as 0.041667
Click OK
6. Define Member Data
Click Members
For each member, input the beginning point, end point, material no., and cross-
section no. as shown in table below:-
Member No. Beginning joint End joint Material No. Cross-section No.
1 1 2 1 1
2 2 3 1 1
3 1 3 1 1
Click OK
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7. Define Joint Loads
Click Loads > Joint Loads
Enter Joint No., X-force, and Y-force as 3, 0, and -40 respectively
Click OK
8. Saving the File
Project > Save project
9. Running the Analysis
Click Analyze
“Save Input Data in File?”, click Yes
“Print Results of the Analysis?”, click No
10. Viewing the Results
Click Joint Displacements to view X Translation and Y Translation
Click Member Forces to view Axial Force
Click Reactions to view X Force and Y Force at support
The print-out results are shown in Appendix A
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B. Analysis of Beam
1. Creating New Model
Project > New Project
Enter project title as Continuous Beam
Select structural type as Beam and click OK
2. Define Joint Coordinates and Supports
Click Joints
Key in X-Coordinate, Y-Coordinate, and Restraints for each joints as tabulated
in below:
Joint X-Coordinate Restraints
A 1 0 Y, Rot.
B 2 20 Y
- 3 30 -
C 4 40 Y
D 5 55 Y, Rot.
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Click OK after finish input the data
3. Define Material Properties
Click Materials
Enter modulus of elasticity E as 4176000
Enter Co-eff. of thermal expansion as 0
Click OK
4. Define Cross-sectional Properties
Click Cross-sections
Enter moment of inertia as 0.024113
Click OK
5. Define Member Data
Click Members
For each member, input the beginning point, end point, material no., and cross-
section no. as shown in table below:-
Member No. Beginning joint End joint Material No. Cross-section No.
1 1 2 1 1
2 2 3 1 1
3 3 4 1 1
4 4 5 1 1
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Click OK
6. Define Joint Loads
Click Loads > Joint Loads
Enter Joint No., Y-load, and moment as 3, -30, and 0 respectively
Click OK
7. Define Uniformly Distributed Loads
Click Loads > Member Loads
Enter Member No. and Load Intensity -w as 1 and 1.5 respectively
Click OK
8. Saving the File
Project > Save project
9. Running the Analysis
Click Analyze
“Save Input Data in File?”, click Yes
“Print Results of the Analysis?”, click No
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10. Viewing the Results
Click Joint Displacements to view Y Translation and Rotation (rad)
Click Member Forces to view Shear force and Moment
Click Reactions to view Y Force and Moment at support
The print-out results are shown in Appendix B
C. Analysis of Frame
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1. Creating New Model
Project > New Project
Enter project title as Frame
Select structural type as Plane Frame and click OK
2. Define Joint Coordinates and Supports
Click Joints
Key in X-Coordinate, Y-Coordinate, and Restraints for each joints as tabulated
in below:
Joint X-Coordinate Y-Coordinate Restraints
A 1 0 0 X, Y
B 2 0 15 -
- 3 10 15 -
C 4 20 15 -
D 5 20 0 X, Y
Click OK after finish input the data
3. Define Material Properties
Click Materials
Enter modulus of elasticity E as 4176000
Enter Co-eff. of thermal expansion as 0
Click OK
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4. Define Cross-sectional Properties
Click Cross-sections
Enter Area A as 0.243056
Enter moment of inertia as 0.048225
Click OK
5. Define Member Data
Click Members
For each member, input the beginning point, end point, material no., cross-
section no., and Hinge as shown in table below:-
Member
No.
Beginning
joint
End
joint
Material
No.
Cross-section
No.
Hinge
1 1 2 1 1 -
2 2 3 1 1 End
3 3 4 1 1 Beginning
4 4 5 1 1 -
Click OK
6. Define Joint Loads
Click Loads > Joint Loads
Enter Joint No., X-load, Y-load, and moment as 2, 10, 0, and 0 respectively
Click OK
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7. Define Uniformly Distributed Loads
Click Loads > Member Loads
Enter first Member No. and Load Intensity -w as 2 and 2 respectively
Enter second Member No. and Load Intensity -w as 3 and 2 respectively
Click OK
8. Saving the File
Project > Save project
9. Running the Analysis
Click Analyze
“Save Input Data in File?”, click Yes
“Print Results of the Analysis?”, click No
10. Viewing the Results
Click Joint Displacements to view X Translation, Y Translation and Rotation
(rad)
Click Member Forces to view Axial force, Shear force and Moment
Click Reactions to view X force, Y force and Moment at support
The print-out results are shown in Appendix C
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References
Kassimali A. (2005). Structural Analysis. Third Edition. Thomson.
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Appendix A – Results of Truss Analysis
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Appendix B – Results of Beam Analysis
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Appendix C – Results of Frame Analysis
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