Question

A 3 hinged parabolic arch subjected to uniformly distributed load through the span length L. The maximum bending moment will occur:

• A. $\text{At quarter span of arch}$
• B. $\text{Zero througout span}$
• C. $\text{At}\frac{3}{8}\text{th span of arch}$
• D. $\text{At crown}$

Answer 1

The correct option is B $\text{Zero througout span}$

A three hinged parabolic arch subjected to uniformly distributed load is not subjected to bending moment at any cross section. It supports the load in pure compression.