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Structural Concrete - Hassoun

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Appendix C <strong>Structural</strong> Aids 1027<br />

Table C.4<br />

(Continued)<br />

38. Concentrated load at midspan:<br />

R A = V A = R B = V B = P 2<br />

M A = M B = M C =− PL<br />

8<br />

Δ max =<br />

PL3<br />

192EI<br />

(at midspan)<br />

Δ x = Px2<br />

48EI (3L − 4x) (x < L 2<br />

)<br />

39. Two symmetrical concentrated loads:<br />

R A = V A = R B = V B = P<br />

Pa(L − a)<br />

M A = M B =−<br />

L<br />

M C = M D = Pa2<br />

L<br />

[<br />

Δ max = PL3 3a<br />

2 ( ) a 3<br />

]<br />

6EI 4L − (at midspan)<br />

2 L<br />

If a = L 3 ,<br />

M A = M B = 2 9 PL<br />

Δ max = 5PL3 (at centerline)<br />

648EI<br />

If a = L 4 ,<br />

M A = M B = 3<br />

16 PL<br />

Δ max =<br />

PL3 (at centerline)<br />

192EI

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