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Structural Concrete - Hassoun

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16.11 Limit Analysis 585<br />

Figure 16.26 Example 16.4: M u<br />

= φM n<br />

and w u<br />

= φw n<br />

.<br />

From Eq. 16.10, the collapse load is w u = 11.66(M u ∕L 2 ), and the collapse moment is M u =<br />

0.085 w u L 2 . The reaction at A is 0.586 w u L, and the reaction at B is 0.414 w u L.<br />

In the equilibrium method, the equilibrium of the beam or of separate segments of the beam is<br />

studied under the forces present at collapse. To illustrate analysis by this method, the two previous<br />

examples are repeated here.

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