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Question

If the loading on a simply supported pre-stressed concrete beam is uniformly distributed, the centroid of tendons should be preferably

A
a straight profile along the centroidal axis
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B
a straight profile along with the lower kern
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C
a parabolic profile with convexity downward
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D
a circular profile with convexity upward
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Solution

The correct option is C a parabolic profile with convexity downward

The profile of tendon in prestressed beam will be mirror image of BMD. The shape of BMD is parabolic with convexivity upwards so shape on tendon will be parabola with convexivity downwards.

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