Seismic Response Analysis of Pile Foundations
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A quasi-3D continuum method is presented for the dynamic nonlinear effective stress analysis of pile foundation under earthquake excitation. The method was validated using data from centrifuge tests on single piles and pile groups in liquefiable soils conducted at the University of California at Davis. Some results from this validation studies are presented. The API approach to pile response using p–y curves was evaluated using the quasi-3D method and the results from simulated earthquake tests on a model pile in a centrifuge. The recommended API stiffnesses appear to be much too high for seismic response analysis under strong shaking, but give very good estimates of elastic response.
Keywords3D seismic analysis Effective stress analysis p–y Curve Piles Simulation
The authors are thankful to D. W. Wilson and B. Gohl for the centrifuge tests data. Financial support provided by UBC through University Graduate Fellowship and by NSERC through Research Assistantship to the first author is gratefully acknowledged.
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