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Structural Analysis

Structural Analysis
In column analogy method, the area of an analogous column for a fixed beam of span L and flexural rigidity El is taken as

L/2EI
L/EI
L/3EI
L/4EI

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Structural Analysis
The three moments equation is applicable only when

The spans are equal
There is no discontinuity such as hinges within the span
There is no settlement of supports
The beam is prismatic

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Structural Analysis
For stable structures, one of the important properties of flexibility and stiffness matrices is that the elements on the main diagonal (i) Of a stiffness matrix must be positive (ii) Of a stiffness matrix must be negative (iii) Of a flexibility matrix must be positive (iv) Of a flexibility matrix must be negative The correct answer is

(ii) and (iv)
(i) and (iv)
(ii) and (iii)
(i) and (iii)

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Structural Analysis
The deflection at any point of a perfect frame can be obtained by applying a unit load at the joint in

Vertical direction
The direction in which the deflection is required
Inclined direction
Horizontal direction

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Structural Analysis
If there are m unknown member forces, r unknown reaction components and j number of joints, then the degree of static indeterminacy of a pin-jointed plane frame is given by

m + r – 2j
m + r – 3j
m + r + 2j
m – r + 2j

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Structural Analysis
The principle of virtual work can be applied to elastic system by considering the virtual work of

Internal as well as external forces
External forces only
None of these
Internal forces only

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MORE MCQ ON Structural Analysis

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