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In hilly areas buildings are built on sloping grounds.When the hilly areas come under the seismic zones, these buildings are highly vulnerable to earthquakes. The dynamic analysis is carried out using response spectrum method to the step back and step back and set back building frames. The dynamic response that is fundamental time period, storey displacement and base shear action induced in columns have been studied for buildings of different heights. These results show that the performance of step back and set back building frames are more suitable in comparison with step back building frames. But after considering bracings to the step back building frames, a better performance can be observed when compared with step back and set back building frames. Three dimensional space frame analysis is carried out for four different configurations such as step back buildings without bracings, step back buildings with bracings, step back and set back building without bracings and regular building on plain ground of buildings ranging from eight, ten and twelve storey resting on sloping ground. Building models are analyzed by Etabs software to study the effect of time period, storey displacement and base shear.

Keywords

Earthquake, Sloping Ground, Response Spectrum Method, Step Back Frames, Step Back and Set Back Frames, Step Back with Bracings, ETABS Software.

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