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Structural Concrete - Hassoun

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938 Chapter 22 Prestressed <strong>Concrete</strong> Bridge Design<br />

Therefore,<br />

4. Shear stress on the concrete<br />

where,<br />

φ v = 0.9<br />

V p = N ps_harped<br />

F<br />

N f sinψ = 10 (942.2)sin(7.36) =31.762 K<br />

ps 38<br />

b v = 6.5in.<br />

V u = 308.4 kip<br />

V p = 31.762 kip<br />

v u = V u − φ v V p<br />

φ v b v d v<br />

v u = V u − φ v V p 308.4 − 0.9(31.8)<br />

= = 0.801 ksi and<br />

φ v b v d v 0.9(6.5)(59.67)<br />

Thus, maximum stirrups spacing, s < = 0.8d v

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