Modal pushover analysis for seismic vulnerability analysis

Abstract

A simple introduction of inelastic structural analysis for seismic vulnerability by considering the definition of pushover analysis and using a simple elasto-plastic material model to compare analytical and numerical results. The modal pushover method is explained to approximate the response due to ”El Centro 1940” ground motion for MDOF systems. The properties of Modal Pushover analysis is used to plot capacity curves vs ground motion spectra in order to perform a one limit state fragility curve using the maximum likelihood method. All explanation are done by following a step by step procedure, then it is applied to a benchmark structure, the 9 storey SAC building.