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DYNAMIC SOIL STRUCTURE INTERACTION ANALYSIS FOR AYMMETRICAL BUILDINGAuthors: Pallavi Ravishankar,Neelima Satyam Conference: 50th INDIAN GEOTECHNICAL CONFERENCE Location College of Engineering (Estd. 1854), Pune, India Date: 2015-12-17 Report no: IIIT/TR/2015/60 AbstractAll of the civil engineering structures involve some type of structural element which is in direct contact with soil. To estimate the accurate response of the superstructure it is necessary to consider the response of the soil supporting the structure and is well explained in the soil structure interaction analysis. Many attempts have been made to model the SSI problem numerically, but have been found that the soil nonlinearity, and foundation interfaces, application of boundary element makes analysis more complex and computationally costlier. To overcome this problem the attempt has been made to optimize the computational efficiency by applying an equivalent pier method for the deep foundation system. In this research paper the L-shape 11 storey building supported by a pile foundation with homogeneous local soil condition is analyzed for dynamic loading including the SSI effect. A new approach has been proposed to provide simplicity in SSI modeling and reduce the computational cost (memory wise). The approach includes the applicability of the equivalent pier method for the asymmetrical pile group system, including SSI effect of the pile foundation system. The approach is validated for group effect and study has been found that the extended equivalent pile method. The evaluated that EPM method can successfully be adopted and helps to reduce the computational cost of SSI problem. The study has been extended to understand the effect of wave propagation through soil mass. In this regards the SSI analysis has been carried out for different soil type including cohesive, Cohisionless and the combination of both with specific bearing capacity consideration. It has been observed that the kinematic interaction is governed primarily by bearing capacity that the soil stiffness. Full paper: pdf Centre for Earthquake Engineering |
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