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Structural Concrete - Hassoun

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870 Chapter 21 Beams Curved in Plan<br />

Figure 21.6<br />

Semicircular beam under uniform load.<br />

1. Shearing force at A:<br />

2. Bending moment at A:<br />

π∕2<br />

V A = V B = wrdθ = wr π = 1.57wr (21.21)<br />

∫ 2<br />

0<br />

π∕2<br />

M A = M B = w(rdθ)×(r sin θ) =wr 2 (21.22)<br />

∫<br />

0

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