EFFECT OF A DIAPHRAGM IRREGULARITY ON SEISMIC ANALYSIS OF RC BUILDING USING PUSHOVER ANALYSIS

Abstract

Diaphragm irregularities are one of the major causes of damage under seismic forces. Buildings with irregular Diaphragm or asymmetrical distribution of structural member and properties are subjected to an increase in seismic forces, causing greater damages to the structures. Diaphragm irregular building leads to often development of brittle collapse mechanisms due to a local increase of the seismic demand in particular members. Diaphragm irregular structures appears to have the most adverse effects on the applicability of the classical nonlinear static procedures, precisely because such methods have been developed for the seismic assessment of structures whose behavior is primarily translational. In this paper an attempt has been made to study and understand the critical behavior of Diaphragm irregular structures subject to seismic forces located at zone V as er IS 1893 2002. Four models has been modeled in SAP 2000 software and conclusions have been made on the basis of static and pushover analysis.