Engineering

## Structural Analysis Through Short Questions and Answers

This slender volume is an offspring of the two volumes of “Comprehensive Structural Analysis” which are fast becoming popular among students and teachers. When these two volumes are expanded to include more chapters such as “Finite Element Analysis”, “Kani’s Method”, etc., these questions and answers would be an integral part of them. The questions are graded from the easy to the stiff ones. Care has been taken to include “good” questions from several university papers, questions that probe the mind rather than the memory. A mastery of this volume will prepare the students not only for their degree but also for GATE, CES and job interviews.
• Publisher: Laxmi Publications
• Language: English
• ISBN : 978-93-80386-50-8
Total Price: 0
• Chapter 1

• Chapter 2

### Preface

This document contains preface.

• Chapter 3

### Acknowledgement

This document contains acknowledgement.

• Chapter 4

### Chapter 1 - Classification and Behaviour of Structures Price 0.11  |  0.11 Rewards Points

1. Differentiate between elastic and inelastic behaviour of structures. Ans A structure is elastic, if upon removal of the loads from the structure, it returns to the predeformed position.

• Chapter 5

### Chapter 2 - Static and Kinematic Indeterminacies of Structures Price 0.11  |  0.11 Rewards Points

Define ‘static indeterminacy’ of structures. Ans. If the conditions of statics i.e. ΣH = 0, ΣV = 0 and ΣM = 0 alone are not sufficient to find either external reactions.

• Chapter 6

### Chapter 3 - General Theorems and Strain Energy Method Price 0.11  |  0.11 Rewards Points

State Castigliano’s first theorem. Ans. Castigliano’s first theorem states that the partial derivative of the total strain energy with respect to an applied force.

• Chapter 7

### Chapter 4 - Slope-Deflection Method Price 0.11  |  0.11 Rewards Points

What are the assumptions made in slope-deflection method ? Ans. Assumptions made in slope-deflection method are (i) between each pair of supports the beam section is constant.

• Chapter 8

### Chapter 5 - Moment Distribution Method and Naylors Method Price 0.11  |  0.11 Rewards Points

What is the difference between absolute and relative stiffness? Ans. Absolute stiffness is represented in terms of E, I and l, such as 4EI.

• Chapter 9

### Chapter 6 - Deflection of Determinate Structures Price 0.11  |  0.11 Rewards Points

Why it is necessary to compute deflections in structures ? Ans. Computation of deflection of structures is necessary for the following reasons : (i) If the deflection of a structure is more than the permissible, the structure will not look aesthetic and will cause psychological upsetting of the occupants.

• Chapter 10

### Chapter 7 - Matrix Flexibility Method Price 0.11  |  0.11 Rewards Points

What is meant by force method in structural analysis ? Ans. A method in which the forces are treated as unknowns is known as force method. The following are force methods : (i) Flexibility matrix method

• Chapter 11

### Chapter 8 - Matrix Stiffness Method Price 0.11  |  0.11 Rewards Points

What is displacement method of analysis ? Ans. A method of analysis in which the displacements are treated as the primary unknowns is known as displacement method of analysis.

• Chapter 12

### Chapter 9 - Rolling Loads Price 0.11  |  0.11 Rewards Points

Where do you get rolling loads in practice ? Ans. Shifting of load positions is common enough in buildings. But they are more pro-nounced in bridges and in gantry girders over which vehicles keep rolling.

• Chapter 13

### Chapter 10 - Influence Lines for Statically Determinate StructuresBeams and Trusses Price 0.11  |  0.11 Rewards Points

What is meant by influence lines ? Ans. An influence line is a graph showing, for any given beam frame or truss, the variation of any force or displacement quantity.

• Chapter 14

### Chapter 11 - Influence Lines for Indeterminate Structures Price 0.11  |  0.11 Rewards Points

State Muller-Breslau principle. Ans. Muller-Breslau principle states that, if we want to sketch the influence line for any force quantity

• Chapter 15

### Chapter 12 - Model Analysis Price 0.11  |  0.11 Rewards Points

What is the necessity of model analysis ? Ans. Necessity of model analysis : (i) When the mathematical analysis of a problem is virtually impossible.

• Chapter 16

### Chapter 13 - Arches Price 0.11  |  0.11 Rewards Points

What is an arch ? Explain. Ans. An arch is defined as a curved girder, having convexity upwards and supported at its ends.

• Chapter 17

### Chapter 14 - Cables and Suspension Bridges Price 0.11  |  0.11 Rewards Points

What are cable structures ? Give examples. Ans. Structures in which the cables act as the main load bearing members are called cable structures. Cables will be in the form of wire ropes or parallel wires joined with clips.

• Chapter 18

### Chapter 15 - Space Trusses Price 0.11  |  0.11 Rewards Points

What is a space truss ? Ans. A frame consisting of members jointed (ball and socket) together at their ends

• Chapter 19

### Chapter 16 - Beams Curved in Plan Price 0.11  |  0.11 Rewards Points

Give two examples for beams curved in plan. Ans. Examples of beams curved in plan are, (i) Beams in a bridge negotiating a curve (ii) Ring beams supporting water tanks, silos, etc.

• Chapter 20

### Chapter 17 - Plastic Analysis of Structures Price 0.11  |  0.11 Rewards Points

Explain plastic moment and yield moment. Ans. The plastic moment (M p ) of a section is defined as the maximum moment of resistance of a fully plastified or yielded cross-section.

• Chapter 21

### Chapter 18 - Redundant Frames Price 0.11  |  0.11 Rewards Points

How will you make the frame shown in Fig. 1 internally determinate ? Sketch the same. Ans. Since the above frame is internally indeterminate to one degree, by removing a member like U 2 L 3 or L 2 U 3 , the structure can be made determinate.

• Chapter 22

### Chapter 19 - Introduction to Theory of Elasticity Price 0.11  |  0.11 Rewards Points

What are ‘surface forces’ ? Ans. Surface forces are the forces distributed/acting over the surface of a body.
Examples : Atmospheric pressure, hydrostatic pressure or contact pressure exerted by one body on another.

• Chapter 23

### Chapter 20 - Introduction to the Finite Element Method Price 0.11  |  0.11 Rewards Points

What is finite element method ? Ans. Finite element method is a very popular numerical technique for the computersolution of complex problems in engineering. Here, the principle of discretisation is used and the structure is considered to be an assemblage of discrete elements.

• Chapter 24

### Chapter 21 - Kanis Method Price 0.11  |  0.11 Rewards Points

Fig. 1 shows a two span continuous beam. Find the rotation factors for the joint B.

• Chapter 25

### Chapter 22 - Rapid and Approximate Analysis of Building Frames Price 0.11  |  0.11 Rewards Points

What is a substitute frame ? Ans. In the analysis of a building frame by two cycle moment distribution method, only a part of the frame is considered for the analysis.

• Chapter 26

### Bibliography

This document contains bibliography.

• Chapter 27

### Index

This document contains index.