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Structural Concrete - Hassoun

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16.4 Portal Frames 563<br />

Figure 16.8<br />

Portal and gable frames.<br />

Figure 16.9<br />

tension side.<br />

Portal frame with two hinged ends. Bending moments are drawn on the<br />

Girders and columns of frames may be of uniform or variable depths, as shown in Fig. 16.8.<br />

The forces in a single-bay portal frame of uniform sections may be calculated as follows.<br />

16.4.1 Two Hinged Ends<br />

The forces in the members of a portal frame with two hinged ends [2] can be calculated using the<br />

following expressions (Fig. 16.9).

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