Abstract: Multistory RC Structure subjected to most dangerous earthquakes. It was found that main reason for failure of RC building is irregular distributions of mass, stiffness and strength or due to irregular geometrical configurations. In reality, many existing buildings contain irregularity due to functional and aesthetic requirements. However, past earthquake records show the poor seismic performance of this structure. This is due to ignorance of the irregularity aspect in formulating the seismic design methodologies by the seismic codes (IS 1893:2002, UBC 1997, NBCC 2005 etc.). The review of seismic design codes and reported research studies show that the irregularity has been quantified in terms of magnitude ignoring the effect of location of irregularity. The principle objective of this project is to study the structural behavior of multistory RC Structure for different plan configuration such as rectangular building along with L- shape and C- shape and H-shape in accordance with the seismic provisions suggested in IS: 1893-2002 using STAAD Pro V8i. The analysis involves load calculation and analyzing the whole structure on the STAAD Pro V8i version for dynamic analysis i.e. Response Spectrum Analysis & Time History Analysis confirming to Indian Standard Code of Practice. For time history analysis past earthquake ground motion record is taken to study response of all the structures. These analyses are carried out by considering different seismic zones (II, III, IV and V) and for each zone the behavior is assessed by taking hard, medium and soft soil. Post analysis of the structure, different response like maximum storey displacement, maximum storey drift, storey shear and maximum overturning moment are plotted in order to compare the results of the linear and non-linear dynamic analysis.

Keywords:  Irregularities, Configuration, Geometry.

| DOI: 10.17148/IARJSET.2018.5612