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RCC Structures Design

RCC Structures Design
If the effective length of a 32 cm diameter R.C.C. column is 4.40 m, its slenderness ratio, is

55
45
50
40

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RCC Structures Design
If the modular ratio is ‘m’, steel ratio is ‘r’ and overall depth of a beam is ‘d’, the depth of the critical neutral axis of the beam, is

[m/(m - r)] d
[(r - m)/m] d
[(m + r)/m] d
[m/(m + r)] d

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RCC Structures Design
If the ratio of the span to the overall depth does not exceed 10, the stiffness of the beam will ordinarily be satisfactory in case of a

Continuous beam
Simply supported beam
None of these
Cantilever beam

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RCC Structures Design
The effective span of a simply supported slab, is

Distance between the centers of the bearings
Clear span plus effective depth of the slab
None of these
Clear distance between the inner faces of the walls plus twice the thickness of the wall

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RCC Structures Design
The maximum shear stress (q) in concrete of a reinforced cement concrete beam is

Shear force/(Lever arm × Width)
(Shear force × Width)/Lever arm
Width/(Lever arm × Shear force)
Lever arm/(Shear force × Width)

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RCC Structures Design
In a doubly-reinforced beam if ‘c’ and ‘t’ are stresses in concrete and tension reinforcement, ‘d’ is the effective depth and ‘n’ is depth of critical neutral axis, the following relationship holds good

mc/t = n/(d - n)
mc/t = (d - n)/t
(t + c)/n = (d + n)/n
(m + c)/t = n/(d + n)

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