Test: Structural Analysis- 1 - Civil Engineering (CE) MCQ

# Test: Structural Analysis- 1 - Civil Engineering (CE) MCQ

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## 10 Questions MCQ Test GATE Civil Engineering (CE) 2025 Mock Test Series - Test: Structural Analysis- 1

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Test: Structural Analysis- 1 - Question 1

### Match List - I (Method) with List-II (Factors) and select the correct answer using the codes given below the lists: List - I A. Moment distribution B. Slope deflection C. Kani’s method D. Force method List - II 1. Rotation factor 2. Flexibility 3. Hardy Cross 4. Displacements 5. Stiffness matrix

Detailed Solution for Test: Structural Analysis- 1 - Question 1

Moment Distribution Method was developed by Hardy Cross
Slope Deflection is also known as Displacement Method.
Knai’s method involves use of rotation factor.
Force Method [Force] [flexibility matrix] = Deflection  Therefore, it involves use of flexibility matrix.

Test: Structural Analysis- 1 - Question 2

### In the virtual work method of plastic analysis of steel structure, the virtual quantity is

Detailed Solution for Test: Structural Analysis- 1 - Question 2

In the virtual work method of plastic analysis of steel structure, the virtual quantity is displacement.

Virtual work arises in the application of the principle of least action to the study of forces and movement of a mechanical system. The work of a force acting on a particle as it moves along a displacement will be different for different displacements. Among all the possible displacements that a particle may follow, called virtual displacements, one will minimize the action. This displacement is therefore the displacement followed by the particle according to the principle of least action. The work of a force on a particle along a virtual displacement is known as the virtual work.

Principle of virtual work: (unit-load Method)

Developed by Bernoulli:

To find Δ at point A du to loads P1, P2, P3. Remove all loads, apply virtual load P’ on point A.

For simplicity P’ = 1

It creates internal load u on representative element.

Now remove this load, apply P1, P2, P3 due to which pt. A will be displaced by Δ

∴ External virtual work = 1.Δ

Internal virtual work = u.dL

P' = 1 = external virtual unit load in direction of Δ.

u = internal virtual load acting on element in direction of a dL.

Δ = external displacement caused by real loads.

dL = internal deformation caused by real loads.

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Test: Structural Analysis- 1 - Question 3

### The figure below shows the displacement caused by load P at two points 1 and 2 respectively. According to Maxwell reciprocal theorem which option is CORRECT.

Detailed Solution for Test: Structural Analysis- 1 - Question 3

The Maxwell reciprocal theorem, states that the deflection at a point A in the direction of  1 due to load at point B in the direction of 2 is equal in the magnitude to the deflection of point B in the direction of 2 produced by a load applied at A in direction 1.

Hence,

δ12 = δ21

Test: Structural Analysis- 1 - Question 4

A fixed beam AB is subjected to a triangular load varying from zero at end A to ‘w’ per unit length at end B. The ratio of fixed end moment at B to A will be

Detailed Solution for Test: Structural Analysis- 1 - Question 4

The fixed end moment at end A

Test: Structural Analysis- 1 - Question 5

Find the carry over moment at support B, in the beam shown with internal hinges at C & D:-

Detailed Solution for Test: Structural Analysis- 1 - Question 5

The beam has internal hinges at C & D, so the beam can be break down as shown

In AC section moment applied = M

So the reaction will be = M/L/2 = 2/ML

The carry – over moment at B = 2M/L × L/4 = M/2

Test: Structural Analysis- 1 - Question 6

The correct order of strain energy in the beams:-

Detailed Solution for Test: Structural Analysis- 1 - Question 6

Deflection, δ = ∂U/∂F

In which beam deflection is higher, strain energy stored will be maximum.

In cantilever, the deflection will be highest.

The deflection of a simply supported beam is higher than propped cantilever as one of the support is fixed.

In a fixed beam, the deflection will be minimum.

So,

δcantilever >  δsimple-support > δpropped cantilever > δfixed

∴ Ufixed < Uproped-cantilever < Usimple-support < Ucantliver

Test: Structural Analysis- 1 - Question 7

The strain energy stored (U) in the cantilever beam shown is –

Detailed Solution for Test: Structural Analysis- 1 - Question 7

BM at section X-X, Mx = W.x

Now, for

For,

∴ For

U will be less than but greater than

Test: Structural Analysis- 1 - Question 8

Find the vertical displacement of joint B if the spring constant k = 1 KN/mm and the rigid beam is loaded as shown below:-

Detailed Solution for Test: Structural Analysis- 1 - Question 8

The FBD of the beam will be

R × L = 10 × 2L

R = 20 KN

So the extension of the spring will be

R = Kx

20 = 1. x

x = 20 mm

From similar triangle

δB = 20 × 2 = 40 mm

Test: Structural Analysis- 1 - Question 9

Find the rotation of joint B if the frame is loaded as shown below:

Detailed Solution for Test: Structural Analysis- 1 - Question 9

Test: Structural Analysis- 1 - Question 10

All members of the frame shown below have equal flexural rigidity EI. Calculate the rotation of joint O if moment M is applied?

Detailed Solution for Test: Structural Analysis- 1 - Question 10

Concept :-

Stiffness value, K when far end is fixed = 4EI/L

Stiffness value, K when far end is roller = 3EI/L

Stiffness value, K when far end is guided roller = EI/L

Calculation:-

For stiffness coefficient when far end is guided roller support refer
:-

Advanced Structural Analysis, Prof. Devdas MenonDepartment of Civil Engineering, Indian Institute of Technology, Madras

Module - 5.3 ,Lecture - 29Matrix Analysis of Beams and GridsPage No. - 9

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