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Theory of Structures

Theory of Structures
For a strongest rectangular beam cut from a circular log, the ratio of the width and depth, is

0.404
0.303
0.505
0.707

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Theory of Structures
Beams composed of more than one material, rigidly connected together so as to behave as one piece, are known as

Compound beams
Composite beams
Indeterminate beams
Determinate beams

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Theory of Structures
If a solid shaft (diameter 20 cm, length 400 cm, N = 0.8 × 105 N/mm²) when subjected to a twisting moment, produces maximum shear stress of 50 N/mm 2, the angle of twist in radians, is

0.003
0.002
0.001
0.0025

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Theory of Structures
The horizontal deflection of a parabolic curved beam of span 10 m and rise 3 m when loaded with a uniformly distributed load l t per horizontal length is (where Ic is the M.I. at the crown, which varies as the slope of the arch).

150/EIc
100/EIc
50/EIc
200/EIc

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Theory of Structures
The ratio of lateral strain to axial strain of a homogeneous material, is known

Yield ratio
Plastic ratio
Poisson’s ratio
Hooke’s ratio

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Theory of Structures
If a concrete column 200 × 200 mm in cross-section is reinforced with four steel bars of 1200 mm² total cross-sectional area. Calculate the safe load for the column if permissible stress in concrete is 5 N/mm² and Es is 15 Ec

264 MN
294 MN
284 MN
274 MN

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