Evaluation of RCC Buildings with Typical Plan Irregularities Using Nonlinear Static Pushover Analysis

All buildings possess some degree of irregularities. The buildings constructed in the present scenario are mostly irregular in both plan and elevation. As dynamic analysis in theory is based on various assumptions that is always regular, it causes a difference in analysis results of irregular buildings and actual performance results. The earthquakes in Latur (1993) and Bhuj (2001) of India showed that irregular buildings are most vulnerable to earthquakes, and this needs to be mitigated. The present paper attempts to study two kinds of typical plan irregularities in building, namely, diaphragm discontinuity and re-entrant corners. The irregularities are created as per the IS 1893 (Part I): 2002 code. The results help in identifying the deficiency and strength of both the types of building models based on the nonlinear static pushover analysis