Study of Lateral Load Resisting Systems of Variable Heights in All Soil Types of High Seismic Zone

A natural hazard like Earthquake causes damage to or collapse of buildings if not designed for lateral loads resulting due to Earthquake. Hence for seismic resistance for high rise structures it is important to provide exclusive Lateral Load Resisting System (LLRS) which will supplement the behavior of moment resisting frames in resisting the lateral load. The dual structural system consisting of special moment resisting frame (SMRF) and concrete shear wall has better seismic performance due to improved lateral stiffness and lateral strength. A well designed system of shear walls in a building frame improves its seismic performance significantly. Steel bracings are also one of the successful lateral load resisting system. The use of steel bracing systems for strengthening or retrofitting seismically inadequate reinforced concrete frames is a viable solution for enhancing earthquake resistance. In the present study, we have used square grid of 20m in each direction of 5m bay in each direction, software used for the analysis is ETABS 7.0, and the work has been carried out for the different cases using shear wall and bracings for the different heights, maximum height considered for the present study is 75m. The modeling is done to examine the effect of different cases along with different heights on seismic parameters like base shear, lateral displacements and lateral drifts. The study also has been carried out for the different zones and different soil as specified in IS 1893-2002. Response of buildings with different heights is presented in table and graphs. Such a study may help to provide guidelines to assess more accurately the seismic vulnerability of building frames and may be useful for seismic design.