Published Paper Details:

Civil engineering structures such as building must have sufficient safety margin under dynamic loading like earthquake. The dynamic performance of a RCC building can be determined accurately that requires appropriate modelling considering foundation-soil, building-foundation and soil interactions. Building-foundation-soil interactions are complex phenomena requiring advanced mathematical and numerical modelling. The soil-structure interaction plays an important role particularly when subjected to seismic excitation, due to the potentially disastrous consequences of a seismic event. In the present work effectiveness of modelling in software for determination of seismic behavior of the medium rise building over raft considering soil flexibility interaction is studied. Modal analysis of building system is carried out in software. For the analysis, three dimensional multiple bays regular RC building model for eight storeys is considered and the soil beneath the structure is modelled as equivalent soil springs connected to the raft foundation. The response spectrum analysis of the soil-structure model was carried out using the general software STAAD.Pro. In both the cases (fixed base and flexible base) of modelling the structure, the earthquake records have been scaled according to the Indian Standard 1893-2002 for each type of soil (i.e. I, II & III) and applied to the ordinary moment resisting frame with seismic zone III, zone IV and zone V.