Seismic Vulnerability of Building on Hill Slope

Due to the scarcity of flat ground, buildings are constructed in the hill area with an irregular structural configuration having foundations at different levels. In this study, the seismic weight of regular building on flat ground is equated to that of the hill building. An analytical study was performed to compare the behaviour of these buildings. The dynamic response of hill building is compared with that of the respective regular building on flat ground in term of fundamental periods of vibration, mode shape, cumulative modal mass participation ratio, forces on member, plastic hinge formation, performance point, plastic hinge formation with base shear action induced in columns and beam of the respective building. From the analysis, based on the time period, modal mass participation ratio, force distribution and formation of plastic hinges in the column it is evident that the regular building on flat ground is flexible than the respective hill slope building.