Global collapse of seismic excited non-deteriorating frame structures vulnerable to p-delta effects

Abstract eng:
In this paper a procedure for prediction of the destabilizing effect of gravity loads, usually referred to as P-delta effect, in seismic excited highly inelastic multi-story frame structures is presented. In particular, the median excitation intensity for P-delta induced structural collapse, which is referred to as collapse capacity, is evaluated. The initial assessment of the structural vulnerability to P-delta effects is based on pushover analyses. More detailed information about the collapse capacity renders Incremental Dynamic Analyses involving a set of recorded ground motions. In a simplified approach equivalent singledegree-of-freedom systems and collapse spectra are utilized to predict the seismic collapse capacity of regular multi-story frame structures with non-deteriorating material properties.

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