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Theory of Structures - Engineering

Q1:

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

A 1 : 1 1/2 : 2

B 2 : 1 1/2 : 1

C 1 : 1 : 2

D none of these.

ANS:C - 1 : 1 : 2

Doesn't depend upon the radius due to the concentrated load applied in a semicircular arch.