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Normal Force

A three-hinge...

Question

A three-hinged symmetrical parabolic arch of span 20 m and rise 5 m carries a uniformly distributed load of 2 kN/m for the whole span. The bending moment at quarter point is

A

zero

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B

75 kN-m (Sagging)

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C

100 kN-m (Sagging)

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D

75 kN-m (Hogging)

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Solution

The correct option is A zero
The bending moment throughout the span will be zero for a three hinged parabolic arch subjected to uniformly distributed load.

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