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Theory of Structures

Theory of Structures
In case of a simply supported rectangular beam of span L and loaded with a central load W, the length of elasto-plastic zone of the plastic hinge, is

L/5
L/4
L/2
L/3

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Theory of Structures
A truss containing j joints and m members, will be a simple truss if

j = 3m – 2
m = 3j – 2
j = 2m – 3
m = 2j – 3

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Theory of Structures
section modulus of a square section of side B and that of a circular section of the ratio of the diameter D, is

2 /15
3 /16
3 /8
/16

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Theory of Structures
There are two hinged semicircular arches A, B and C of radii 5 m, 7.5 m and 10 m respectively and each carries a concentrated load W at their crowns. The horizontal thrust at their supports will be in the ratio of

1 : 1½ : 2
1 : 1 : 2
None of these
2 : 1½ : 1

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Theory of Structures
For calculating the allowable stress of long columns σ0 = σy/n [1 - a (1/r)²]is the empirical formula, known as

Parabolic formula
Straight line formula
Rankine
Perry

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Theory of Structures
The eccentricity (e) of a hollow circular column, external diameter 25 cm, internal diameter 15 cm for an eccentric load 100 t for non-development of tension, is

3.00 cm
3.50 cm
4.25 cm
2.75 cm

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