Seismic Analysis of Multi-Storied Building Resting on Hilly Areas

In many countries, without exception to India, towns and cities are being developed nearby hilly regions also. Due to scarcity of plain terrains, construction of multi- storied buildings are extended to hilly regions causing vertical irregularities in such buildings. During an earthquake, the dynamic behavior of the structures on hilly slopes will be different in terms of natural time periods and displacements compared to those constructed on plain regions. Examples of severe damages or collapse of buildings, witnessed during 2001 Bhuji,2011 Sikkim and 2015 Nepal earthquakes, made researchers to study the response of structures standing on hilly regions.In the present study, a multi-storied building(G+5), resting on different slopes like 150, 300, 450 in hilly regions with stepped back configuration, is chosen for study. The response parameters like natural frequencies, time periods, base shears and displacements are worked out and the results are compared with those when similar building rests on plain region. The results obtained using "STAAD Pro" software are compared with those of results obtained from manual calculations and the variation.