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A rectangle beam 230mm x 450mm (effective depth) is reinforced with a bar of 16mm diameter out of which two bars are bent at $45^0$.

Determine the shear resistance of the bent up bars and additional shear reinforcement required if the ultimate shear force is 300kN. Design shear reinforcement. Adopt M20 and Fe415.

Pt % 0.25 0.50 0.75 1.0 1.25 1.50 1.75 2.0 2.25 2.5
$\tau$ 0.36 0.48 0.56 0.62 0.67 0.72 0.75 0.79 0.81 0.83
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