Incremental Dynamic Analysis for seismic Assessment of RC Building using SeismoStruct Software

Abstract

IDA is a parametric analysis which predicts absolute structural responses and performances. Analysis is perform by properly defining structural model which is subjected to a suite of ground motion records and the intensity of these ground motions are scaled increasingly using scale factors. The intensity continues to increase when the whole structural responses range from elastic to the nonlinear followed by structural collapse. In the end, a number of curves depicting the specified responses versus the ground motion intensity levels are produced. IDA performs a large number of non-linear time history analysis. Although IDA is time consuming analysis, it can provide the whole range of structural responses from elastic to collapse. Present study deal with existing RC Moment resisting frame located in Zone III. 12 storey structure, symmetric in plan is used to study Incremental Dynamic analysis using seismostrut-2018. SeismoStruct 2018, a finite element program is used for the analysis. IDA curves are developed with respect to spectral acceleration (Sa (T1, 5%). Twenty real ground motion pairs were selected and scaled in SeismoMatch 2018, then applied to the buildings to perform the Incremental Dynamic Analysis (IDA). For te development of fragility curves, guidelines given by HAZUS MH MR-4 technical manual have been used. Spectral acceleration is considered for plotting the fragility curve.