Abstract
A methodology is presented for modelling the inelastic torsional response of buildings in nonlinear static (pushover) analysis, and is evaluated against the results of inelastic dynamic time history analysis. A spectral modal pushover analysis is performed using spectral load vectors defined from elastic analysis, while the dynamic characteristics of an equivalent single mass system, which incorporates both translational and torsional modes, are derived using an extension of earlier methods based on the SDOF approach. The suggested method is verified for the case of single-storey monosymmetric buildings using unidirectional, as well as bidirectional excitation, under various strong motion records
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