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Structural Concrete - Hassoun

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Appendix C <strong>Structural</strong> Aids 1029<br />

Table C.6<br />

4. Load on span CD:<br />

Moments in Three Unequal Spans and Values of the Coefficient K (w = Load/Unit Length)<br />

M B<br />

= wL2 3<br />

M C<br />

= wL2 3<br />

K<br />

K<br />

L 2<br />

/L 3<br />

(positive) (negative)<br />

0.25 100.0 9.9<br />

0.30 90.9 10.3<br />

0.40 76.3 11.0<br />

0.50 70.4 11.7<br />

0.60 65.8 12.3<br />

0.70 62.9 13.0<br />

0.80 61.7 13.7<br />

1.00 59.9 14.9<br />

5. Load on middle span:<br />

L 2<br />

/L 1<br />

M B<br />

= M C<br />

= wL2 2<br />

K<br />

(negative)<br />

0.25 43.5<br />

0.30 38.5<br />

0.40 32.3<br />

0.50 27.8<br />

0.60 25.6<br />

0.70 23.3<br />

0.80 22.2<br />

1.00 20.0<br />

6. Load on span AB:<br />

M B<br />

= wL2 1<br />

M<br />

K<br />

C<br />

= wL2 1<br />

K<br />

L 2<br />

/L 1<br />

(negative) (positive)<br />

0.25 9.9 100.0<br />

0.30 10.3 90.9<br />

0.40 11.0 76.3<br />

0.50 11.7 70.4<br />

0.60 12.3 65.8<br />

0.70 13.0 62.9<br />

0.80 13.7 61.7<br />

1.00 14.9 59.9

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