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RCC Structures Design - Engineering

Q1:

An R.C.C. beam of 25 cm width and 50 cm effective depth has a clear span of 6 metres and carries a U.D.L. of 3000 kg/m inclusive of its self weight. If the lever arm constant for the section is 0.865, the maximum intensity of shear stress, is

A 8.3 kg/cm2

B 7.6 kg/cm2

C 21.5 kg/cm2

D 11.4 kg/cm2

ANS:A - 8.3 kg/cm2

Maximum intensity of shear stress
= shear force/(leaver arm * width of beam).

So
Tc,max=V/job.
V=wl/2.
=3000 * 6/2 = 9000kg.

Leaver arm= 0.865times of depth of beam.
= 0.865 * 50= 43.25.
T.c max=9000/(43.25 * 25) = 8.323kg/cm^2.