Abstract
Structures resting on sloping ground are highly vulnerable to earthquakes due to irregularities in plan and elevation. Structures are often analysed under earthquake loadings, without considering the effect of soil–structure interaction (SSI). This practice is not advisable from practical point of view. In this present study, an attempt has been made to study the effect of slope angle variation for the structures resting on sloping ground, considering the base of the structures fixed as well as flexible (SSI). The analysis is performed in equivalent static force method (ESFM), response spectrum method (RSM), time history method (THM), nonlinear static method (NLSM) and nonlinear time history method (NLTHM). Results expose the criticality associated with increment of slope angle, with and without SSI consideration. Importance of considering SSI in seismic analysis is also revealed.
Highlights
Strong earthquakes strike frequently at different parts of the world causing destruction to life and all kind of structures
performance point (PP) defines the overall performance of the structure under earthquake loading
Models with soil–structure interaction (SSI) consideration give even more poor results compared to the fixed base models, because of
Summary
Strong earthquakes strike frequently at different parts of the world causing destruction to life and all kind of structures. All kind of structure is vulnerable to earthquake loading, but the structures with irregularities are proved to be the most vulnerable. The insufficiency of plain ground in hilly region compels for construction activity on hilly slopes. Formation of plain area by earth excavation for construction is very costly and time consuming; on the other hand, it destroys the natural beauty of the landscapes. Financial development and quick urbanisation in these sloping areas have been quickened because of the land improvement. The construction of multi-storeyed building on hill slopes has gained popularity. It must be noticed that structures on inclines are not the same as those in plain land, i.e. they are
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