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Reinforced Cement Concrete

Types of Pre-Stressing

A simply supp...

Question

A simply supported rectangular beam is uniformly loaded and is prestressed. The tendon provided for prestressing should be

A

Straigh, above centroidal axis

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B

Straight, below centroidal axis

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C

Parabolic, with convexity upward

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D

Parabolic, with convexity downward

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Solution

The correct option is D Parabolic, with convexity downward
From the load balancing concept the shape of the tendon should correspond to the shape of the bending moment diagram.

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