Civil Engineering - UPSC Civil Service Exam Questions - Discussion

18. 

A three-hinged parabolic arch rib with hinges at abutments and at crown is under the action of uniformly distributed load 'W' per unit length over its entire span 'l' through its crown. The bending moment at quarter span is

[A]. zero
[B]. Wl2/8
[C]. Wl2/12
[D]. Wl2/24

Answer: Option A

Explanation:

No answer description available for this question.

Umesh said: (Sep 5, 2018)  
Three hinged parabolic subjected to uniformly distributed load. Forms a shape of Funicular polygon.

In which the shear force and Bending moment at everysection will be zero.

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