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DSSI FOR PILE SUPPORTED ASYMETRICAL BUILDINGS IN A STRATIFIED SOILAuthors: Pallavi Ravishankar,Neelima Satyam Conference: National Conference on Geo-Innovations Location Bangalore, India. Date: 2014-10-30 Report no: IIIT/TR/2014/90 AbstractIn order to get the exact response of the structure under the earthquake loading, it is necessary to include the interaction effect in the analysis. It is a very challenging task to include the interaction effect in the analysis as it is very complex and governed by the many factors including impedance, wave propagation, resonance, damping etc [10]. In the present study, the 3-story asymmetrical building supported by pile foundation is considered for the analysis. Dynamic analysis is carried out in time domain by applying a Bhuj (2001,0.31g) ground motion and the response of the superstructure is predicted in the form of displacements and stresses. The elastic half space is considered as supporting local soil which included the horizontal stratification with four soil layers. The parametric study has been carried out for a different stratification order with the Mohr-Coulomb material model. For each analysis case the displacement of the superstructure and piles have been estimated using finite element software. The response is compared with the equivalent homogeneous soil strata which shows the average engineering properties of the stratified soil considered in the present study. It has been observed that the response varies with the stratification sequence and more for the granular soil overlaid on the clay. The response with the equivalent homogenous soil strata is found to be greater that other analysis cases and thus study concluded that the stratification plays an important role in the response of the superstructure. Full paper: pdf Centre for Earthquake Engineering |
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