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Strength of Materials

Flexural Strength of Sections

A 450 mm long...

Question

A 450 mm long plain concrete prism is subjected to the concentrated vertical loads as shown in the figure. Cross section of the prism is given as 150 mm x 150 mm. Considering linear stress distribution across the cross-section, the modulus of rupture(expressed in MPa).

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Solution

The correct option is A 3
Modulus of rupture

$= \frac{M}{Z}$

$= \frac{11.5 \times 0.15 \times 10^{6}}{\frac{(150)^{3}}{6}} = 3 M P a$

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