Study of Lateral Load Resisting Systems of an Irregular Building Located At High Seismic Zone for All Soil Types

Presence of re-entrant corners is one such irregularity which adversely affects the seismic behaviour of the buildings.re-entrant corners due to plan asymmetry causes stress concentration due to sudden changes in stiffness and torsion in the building. The present work focuses on study of SMRF building with irregular plan and strengthening the re-entrant corners at inner and outer notch with shear wall and bracings for different soil conditions. The building was modelled and analysed using Equivalent static method, response spectrum method and pushover analysis for seismic parameters like base shear, storey drift, lateral displacement. It was observed that SMRF with shear wall and bracings were more effective in seismic resistant of a structure when compared to SMRF. Comparing all the three frames, SMRF with shear all was more effective in all soil types. Extreme increase in base shear, lateral drift and displacements was observed in models with soft soil. Comparing all the three seismic analysis pushover analysis is more accurate since it consists of non-linearity behaviour of the material.