kassimali software briefing

1

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 →

2

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

3

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

4

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

5

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.

6

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

7

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

8

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

9

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

10

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

11

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

12

References

Kassimali A. (2005). Structural Analysis. Third Edition. Thomson.

13

Appendix A – Results of Truss Analysis

14

15

Appendix B – Results of Beam Analysis

16

17

18

Appendix C – Results of Frame Analysis

19

20

21