Performance Evaluation of Flat Slab with Storey Height Variation Using Pushover Analysis

Flat slab buildings are becoming popular from aesthetic and architectural point of view and gaining importance as they have many advantages like shorter construction time, easier form work, economical, large clear ceiling height. So, construction of flat slab building is increasing in high seismic zone. But performance of flat slab building in high seismic zone is very poor. It is observed that in present era, storey height variation is the need of the building.Large ground storey height is very common feature in the multistory construction. Now a day, in modern multistory construction sometime it is needed to provide large floor to floor height at any intermediate storey which may cause collapse of structure during earthquake. In the present study performance of flat slab building and effect of storey height variation is evaluated by using pushover analysis. Three (G+12) flat slab building models showing storey height variation at different storey are taken for this study; Response in the form of capacity demand curve, storey drift, performance point, hinge formation mechanism, storey shear for all models is evaluated and compared.