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Title: Centrifuge and Numerical Modelling of the Seismic Response of Pile Groups in Soft Soils
Authors: ZHANG LEI
Keywords: Centrifuge test, earthquake, pile group, numerical simulation, soft clay, bending moment
Issue Date: 30-Jul-2014
Citation: ZHANG LEI (2014-07-30). Centrifuge and Numerical Modelling of the Seismic Response of Pile Groups in Soft Soils. ScholarBank@NUS Repository.
Abstract: In this study, a series of centrifuge tests and numerical simulations were performed to investigate the seismic response of pile groups embedded in soft clays. Several small-scale pile raft models were fabricated for the centrifuge tests, with both stiff and flexible piles being considered. Two different earthquakes are considered, these being representative of events that may arise from the Sunda Subduction Trench and Sumatra Fault Zone, respectively. The accelerations at selected locations, as well as the bending strains along the instrumented pile shafts, were measured during the simulated earthquake events. By employing a hyperbolic-hysteretic soil constitutive model, a number of 3D finite element analyses were also performed for comparison with the centrifuge test results. Besides, numerical simulations were extended to a series of parametric studies. Based on the parametric studies, correlations were proposed to respectively predict the maximum bending moment near pile head and peak acceleration at the raft top.
Appears in Collections:Ph.D Theses (Open)

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