GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER-VII (NEW) EXAMINATION - WINTER 2020
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Subject Code:2174007 Date:30/01/2021
Subject Name: Computer Aided Structural Analysis and Design
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
- Attempt any FOUR questions out of EIGHT questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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MARKS
Q.1 (a) Explain any two of the following: (i) Static and kinematic indeterminacy 03
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(i) Member flexibility matrix (ii1) Principle of superposition
(b) Explain role of transformation matrix in structural analysis 04
(c) Write a note on “Importance of Matrix Algebra in Matrix Methods of 07
Structural Analysis”.
Q.2 (a) Discuss on “Contra gradient Principle”. 03
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(b) Briefly explain flexibility method of analysis. 04
(c) Explain properties & special characteristics of stiffness matrix of a 07
structure.
Q.3 Analyze the continuous beam shown Figure. Assume that the supports are 14
unyielding. Assume that EI is constant for all members, using Stiffness Method.
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l 10 kN 2 kN/m
7 @ éHHHHED
1 4 m =g SR W j, 2m | 4 m |
' ' I | 1
Q.4 (a) Derive load vector and displacement matrix for simply supported beam 07
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subjected to w kN/m uniformly distributed load long entire span of L.
(b) Explain local and global stiffness matrix for a simple truss member with 07
example.
Q.5 A truss of span 7.5 m carries a point load of 1 kN at joint D as shown in 14
figure. Find the reactions and forces in the members of the truss, using
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Stiffness Method.
c
@
®
A 300 ® 607\ 307N\8
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8 D @
i il V1 kN
75m
R, Ry
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Q.6 (a) Write short note on “Static condensation of stiffness matrix”. 07
(b) Write short note on “Sub Structuring of stiffness matrix”. 07
Q.7 Enumerate generalized steps involved for analysis and design of building 14
in commercial software packages and explain them in brief.
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Q.8 Consider a two bay two storey frame is to be analyzed by computer
programme of stiffness matrix method
(a) Prepare flow chart for the programme & state input required. 07
(b) How will you input support conditions of the structure? 07
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