SEISMIC ANALYSIS OF RC FRAMED BUILDINGS

Abstract

Lateral load resisting systems like shear walls, bracing systems etc. greatly affect and improve the performance of structures which are subjected to lateral forces due to wind and seismic activities. The behaviour of building is strongly affected by the arrangement of shear walls, the rigidity of floors, bracing systems used and the type of structural system used like tubular structure, bundled tube structure, outrigger forms etc. Building with structural shear walls improves the lateral load resistance. In this project, an analytical parameter study is done for the structural shear walls with varying locations to find the best location for shear wall for the given models. A comparative analytical study has been done between bare frame models and models with shear walls for different floors and heights. Different buildings with varying floor levels and varying in different zones of seismic activity and in varying soil i.e. soft, medium and hard soil have been analysed and compared. Load combinations that have been considered are as per IS 1893 (Part-1):2002 and IS 875. The result in terms of axial forces, lateral displacement and bending moment in the structural shear walls with varying height are compared for different building models considered. It has been found that shear wall greatly improves the performance of the structure both in terms of serviceability as well as improving the load resistance.