Abstract: Behavior of a multi-story building during strong earthquake motion depends on structural configuration. Irregular configuration either in plan or in elevation is recognized as one of the major causes of failure during earthquakes. The paper presents a study on the seismic response of the RC structure under strong earthquake motions. FEM based software ETABS V 19 was used to evaluate seismic performance of the structure. The objective of this study is to understand the importance of irregularities, behavior of different irregularity of reinforced concrete structure to seismic forces, its failure pattern during earthquake, to suggest safe performance level for various types of irregularities.

Keywords: Irregularity, Horizontal Irregularity, Vertical Irregularity, Mass Irregularity, Seismic performance.

| DOI: 10.17148/IARJSET.2022.96134