Seismic Performance of Reinforced Concrete Frame with Plan Irregularity

Historically regular buildings perform better in earthquake than irregular buildings which are prone to damage during earthquake. But dueto functional and architectural requirements irregularity in structure is unavoidable. While trying to understand the seismic response of irregular structure many researches attempt by using nonlinear static pushover analysis. Performance point in pushover analysis may evaluate the capacity and demand of overall structure. But the response of individual member in the structure with reference to its capacity and the demand that exist in the member needs in depth study. This paper reports results of such study on three different structures. The members so identified are modified so that the structure not only satisfies performance point requirement but also at local level all the members have enough capacity that far exceeds the demand requirement.