Abstract

A performance-based design is aimed at controlling the structural damage based on precise estimations of proper response parameters. Performance-based seismic design explicitly evaluates how a building is likely to perform; given the potential hazard it is likely to experience, considering uncertainties inherent in the quantification of potential hazard and uncertainties in assessment of the actual building response. In the present study the performance based seismic design is performed using a simple computer based pushover analysis technique using SAP2000. The proposed method is illustrated by finding the seismic performance point for a four storey reinforced concrete framed building located in Zone-IV, symmetrical in plan (designed according to IS 456:2000).Two performance levels are considered namely:1) Under Design Basis Earthquake (DBE), damage must be limited to Grade 2 (slight structural damage, moderate nonstructural damage) in order to enable Immediate Occupancy after DBE; 2) Under Maximum Considered Earthquake (MCE), damage must be limited to Grade 3 (moderate structural damage, heavy nonstructural damage) in order to ensure Life Safety after MCE.An extensive parametric study is conducted to investigate the effect of many important parameters on the performance point. The parameters include changing reinforcement of columns, size of columns and beams individually and in different combinations. The results of analysis are compared in terms of base shear, spectral acceleration, spectral displacement and storey displacements.