Question

A uniformly distributed load intensity, w, acting on a simply supported prestressed concrete beam of span, L, producing a bending moment, M, at mid-span is to be balanced by a parabolic tendon with zero eccentricity at ends and eccentricity e, at mid-span. The prestressing force required depends on:

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Solution

The correct option is **D** M and e

For fully counteract the effect of external

M=Pe costθ

P=Me cosθ

Hence prestressing force P depends upon M & e.

For fully counteract the effect of external

M=Pe costθ

P=Me cosθ

Hence prestressing force P depends upon M & e.

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