Question

Three semicircular symmetrical 3-hinged arches have radii 3 m, 6 m and 9 m and each arch supports the point load W at its crown. Then the ratio of horizontal thrust in these arches is

• A. 1 : 1 : 1
• B. 1 : 2 : 3
• C. 3 : 2 : 1
• D. 1 : 4 : 9

Answer 1

The correct option is A 1 : 1 : 1

$\text{In three hinged semicircular arch subjected to point load W at its crown, horizontal thrust is given as}H=\frac{W}{2}\text{which is independent of radius of semi-circular arch.}$