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Dimensional Analysis

The loss in p...

Question

The loss in prestress (in MPa) due to slip of $4$ $m m$ in a post tensioned beam of span $25$ $m$ with a initial prestress of $1200$ $M P a$ is________. ( $E_{s} = 210$ $G P a$ )
33.4

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Solution

The correct option is A 33.4
Loss in prestress $= E_{s} . ϵ_{s l i p}$
$= (210 \times 10^{3}) \times \frac{4}{25 \times 10^{3}} = 33.6$ $M P a$

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