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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

40
50
55
45

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RCC Structures Design
‘P’ is the pre-stressed force applied to the tendon of a rectangular pre-stressed beam whose area of cross section is ‘A’ and sectional modulus is ‘Z’. The maximum stress ‘f’ in the beam, subjected to a maximum bending moment ‘M’, is

f = (P/A) + (M/Z)
f = (A/P) + (M/Z)
f = (P/'+ (Z/M)
f = (P/A) + (M/6Z)

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RCC Structures Design
An under-reinforced section means

Steel provided is insufficient
Steel will yield first
Steel is provided at the underside only
Steel provided on one face only

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RCC Structures Design
By over-reinforcing a beam, the moment of resistance can be increased not more than

15 %
20 %
25 %
10 %

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RCC Structures Design
‘P’ is the pre-stressed force applied to tendon of a rectangular pre-stressed beam whose area of cross section is ‘A’ and sectional modulus is ‘Z’. The minimum stress ‘f’ on the beam subjected to a maximum bending moment ‘M’ is

f = (P/A) - (M/Z)
f = (P/A) - (M/6Z)
f = (P/'- (Z/M)
f = (A/P) - (M/Z)

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RCC Structures Design
A part of the slab may be considered as the flange of the T-beam if

It is built integrally with the beam
All of the listed here
Flange has adequate reinforcement transverse to beam
It is effectively bonded together with the beam

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