The Analysis of Irregular Shaped Structures Wood Diaphragms and Shear walls
Residential and commercial buildings have become more complex than structures built only a few decades ago. To create architecturally appealing structures, horizontal and vertical offsets in the diaphragms, multiple reentrant corners, multiple irregularities, and fewer vertical lateral-force-resisting elements have become commonplace. The structural configurations of many modern buildings require very complex lateral load paths. Most texts and publications available only address simple rectangular diaphragms and shear walls. Methods of analysis for these simpler diaphragms and shear walls do not easily adapt to complex diaphragms and shear wall layouts in irregular shaped structures.
Calculating the forces that are to be transferred across multiple discontinuities and detailing the design requirements on the construction documents can be very challenging and time consuming. Various methods of analyzing the distribution of lateral loads in complex structures were developed in the early 1980s, based largely on work done by the Applied Technology Council (ATC-7),
among others. But the distribution of this information has been limited, making some of the material hard to find. Innovations in wood construction have also introduced cross-laminated timber (CLT) into wood roof, floor, and wall constructions. While basic load path analysis is material independent, the use of CLT in lateral-force-resisting diaphragms and shear walls brings in new design considerations for practicing engineers.
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