Bending moments and shear forces are the dominant seismic actions within walls. Possible expressive architectural strategies include differentiating between wall chords and webs; that is, between moments and shear forces (Fig. 17.6). Chord dimensions and wall thicknesses can be
varied in response to force intensity. One approach that articulates varying intensities of shear force and the need for a plastic hinge at a wall base without penetrations, has been to increase the area of fenestration towards the top of a wall (Fig. 5.8). But far more explicit examples of shear walls expressing their structural actions are possible (Fig. 17.3(b)).
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