Simulations of a Centrifuge Test with Lateral Spreading and Void Redistribution Effects
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 139, Issue 8
Abstract
Numerical simulations of a centrifuge test, in which dissipation patterns, lateral spreading, and shear strain localization were measured and recorded, are performed for validation of the numerical modeling approach and insight on the deformation mechanisms. The constitutive model calibration process is performed based on available laboratory data and is described in detail. The model container and construction sequence are simulated to provide good approximations of the boundary conditions and initial stress distributions. Two approaches for simulating successive shaking events are presented and compared. The key observations and mechanisms from the centrifuge test, namely (1) the dynamic response and onset of liquefaction, (2) the amount and pattern of surface deformation, (3) the patterns of pore pressure dissipation and void ratio redistribution, and (4) the difference in response between a sand profile treated and not treated with liquefaction drains, are all reasonably captured and bounded by the simulations.
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Acknowledgments
Funding for this research was provided by USGS Award No. G09AP00121. Richard Armstrong provided the FLAC model for the centrifuge container. The centrifuge test was performed in collaboration with Ellen Rathje, Antonio Marinucci, Seiji Kano, Carolyn Conlee, and Patricia Gallagher with funding from National Science Foundation Award No. CMS-0530478. Rachelle Howell and Ellen Rathje provided valuable comments on model calibration. Katerina Ziotopoulou provided valuable support with the constitutive model and numerical modeling. The above support and assistance are appreciated.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 139 • Issue 8 • August 2013
Pages: 1250 - 1261
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Sep 22, 2010
Accepted: Oct 1, 2012
Published online: Oct 3, 2012
Published in print: Aug 1, 2013
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