Predicting collapse loads for buildings subjected to seismic shock

In this paper an analytical expression that estimates the collapse load of a generic class of multi-storey, uniform, moment-resisting steel frames is presented. This expression is validated and calibrated with nonlinear pushover analyses (NPA) and incremental dynamic analyses for a set of buildings, of differing heights, that are designed according to the Eurocodes. The efficacy of different seismically induced load profiles in NPA is discussed with a preferred profile suggested for this class of structural system. The relationship between the actual seismic force reduction factor and code specified behavior factors is underlined.

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