Seismic Evaluation of RC Multi Storey Bare Frame Buildings with and without Irregularities

The seismic performance of building with irregular distribution of mass, stiffness, and strength along the height may be significantly different from that of regular buildings. Design codes prohibit construction or recommend special seismic design of such buildings depending on the level of irregularity and site hazard. It is generally believed that the regular buildings have a dominant fundamental mode participation in their seismic response and as the irregularity increases the contribution of higher mode increases. In this present study attempts to check the correlation between regular and irregular buildings, in this study 12 models of different measurements are made regular and irregular in plan and elevation using ETABS software. Parameters such as base shear, storey drift, lateral displacements are studied by linear static analysis to ascertain the overall capacity of the considered RC framed building and building performance level under server seismic zone III are studied by Equivalent static method and Response spectrum method.