Development of Dissipation Model of Excess Pore Pressure in Liquefied Sandy Ground
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VIEW THE REPLYPublication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 135, Issue 4
Abstract
Recently, several studies on the dissipation of excess pore pressure in liquefied sandy grounds have been reported on evaluation of postliquefaction behavior of structures. To further contribute to the understanding of this complicated dynamic phenomenon, centrifuge tests were performed in this research to analyze the liquefaction behavior of level saturated sandy grounds. The test results showed that the excess pore pressure in the liquefied sand was dissipated by the combined process of the solidification of the sand grains and the consolidation of the solidified layer. Based on the test results, a nonlinear model for the solidified layer thickness versus time, i.e., the solidification velocity, was developed. A new dissipation model was also developed by combining the nonlinear solidification model with Scott’s theory to improve the prediction for the time history of excess pore pressure. In addition, a method for evaluating the input parameters in the dissipation model was proposed by relating the parameters to the particle size and the relative density of soils. The proposed dissipation model properly estimated the dissipation of excess pore pressure with time observed in the centrifuge experiments.
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Acknowledgments
This study was supported by research funds from Dong-A University.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 135 • Issue 4 • April 2009
Pages: 544 - 554
Copyright
© 2009 ASCE.
History
Received: Jun 14, 2007
Accepted: Jul 2, 2008
Published online: Apr 1, 2009
Published in print: Apr 2009
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