Seismic Evaluation of Multi Storeyed Building on A Sloped Ground.

Most of the hilly regions of India are highly seismic. Buildings on hill slopes differ in a way from other buildings. The various floors of such building steps back towards the hill slope and at the same time buildings may have setbacks also. Due to varied configurations of buildings in hill areas, these buildings become highly irregular and asymmetric. Buildings situated in hilly areas are much more vulnerable to seismic environment. The performance of structures during past earthquakes has shown that asymmetric-plan buildings are especially vulnerable to earthquake damage. In this study, 3D analytical model of 13 storied Ascending & Descending slope buildings have been generated & analyzed using structural analysis tool ‘ETABS Non-linear�. To study the effect of infill and concrete core wall during earthquake, seismic analysis using both linear dynamic (response spectrum method) as well as non-linear static procedure (pushover) has been performed. From the above studies it has been observed that nonlinear pushover analysis provide good estimate of global as well as local inelastic deformation demands and also reveals design weakness that may remain hidden in an elastic analysis. Storey drifts are found within the limit as specified by code (IS: 1893-2002 part-1) in both linear dynamic and non-linear static analysis.