Three Dimensional Numerical Analysis of Seismic Soil-Structure Interaction Considering Soil Plasticity

The New Zealand Geotechnical Society (NZGS)
Publication Type:
Conference Proceeding
The New Zealand Geotechnical Society (NZGS), 2015, 1 (1), pp. 1 - 9 (9)
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Effects of soil Plasticity Index (PI) on the seismic response of mid-rise buildings considering soil-structure interaction is investigated in this study. A 15-storey building resting on class E soil with different values of PI has been simulated utilising FLAC3D software. Fully nonlinear dynamic analysis under different earthquake recording including two near field and two far field earthquakes has been conducted and results in terms of the base shear, maximum lateral displacement and inter-storey drift are compared and discussed. Results indicate that as PI increases, the base shear of the structure resting on the soft soil, the maximum lateral displacement and inter-storey drift increase. It is concluded that practicing engineers should consider effects of soil plasticity on the seismic design of building frames constructed on soft soils accurately.
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