question_answer

On increasing the depth, the deep bar may bend as shown in figure this is called as ?A.,. Here, A refers to

A) Buckling

B) Bucking

C) Building

D) Sagging

Correct Answer: A

Solution :

But on increasing the depth, unless the load is exactly at the right place (difficult to arrange in a bridge with moving traffic), the deep bar may bend as shown in Fig. (i). This is called bucking.

To avoid this, a common compromise is the cross-sectional shape shown in Fig. (ii). It provides a large load-bearing surface and enough depth to prevent bending.

This shape reduces the weight of the beam without sacrificing the strength and hence reduces the cost.