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Structural Analysis: Nuclear Quiz 1

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Question 1

For the simply supported beam AB shown above, which one of the following is correct for maximum shear at the centre of the span for a live load longer than the span?

Question 2

A symmetrical two-hinged parabolic arch when subjected to a uniformly distributed load on the entire horizontal span, is subject to

Question 3

A single storey building model is shown in the figure. The rigid bar of mass ‘m’ is supported by three massless elastic columns whose ends are fixed against rotation. For each of the columns, the applied lateral force (P) and corresponding moment (M) are also shown in the figure. The lateral deflection (δ) of the bar is given by where L is the effective length of the column, E is the Young’s modulus of elasticity and I is the area moment of inertia of the column cross-section with respect to its neutral axis.

For the lateral deflection profile of the columns as shown in the figure, the natural frequency of the system for horizontal oscillation is

Question 4

The kinematic indeterminacy of a frame as shown as:

Question 5

When a uniformly distributed load longer than the span of girder moves from left to right, then the maximum bending moment at mid-section of span occurs when the uniformly distributed load occupies:

Question 6

Influence line for member force in AB of the truss shown is obtained by

Question 7

A three span continuous beam is fixed at its ends and supported by two rigid supports in between. The order of the reduced stiffness matrix for this beam is

Question 8

Which of the following equation is the correct equilibrium equation at joint ‘C’ for the frame shown below?

Question 9

Which of the following statements are true?
1) For a stiffness matrix kij = kji always.
2) The principal diagonal of a stiffness matrix is always non zero positive.
3) Stiffness matrix is always a square matrix.
4) Stiffness matrix method is not useful in complex structures.

Question 10

A single portal frame of height ‘l’ fixed at the base is subjected to horizontal displacement ‘’ at the top. Assume beam to be correct, and columns have flexed rigidity ‘EI’. The base moment developed will be proportional to?
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