Pore Pressure Generation Models for Sands and Silty Soils Subjected to Cyclic Loading
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 134, Issue 10
Abstract
This paper discusses the applicability of two simple models for predicting pore water pressure generation in nonplastic silty soil during cyclic loading. The first model was developed by Seed et al. in the 1970s and relates the pore pressure generated to the cycle ratio, which is the ratio of the number of applied cycles of loading to the number of cycles required to cause liquefaction. The second model is the Green-Mitchell-Polito model proposed by Green et al. in 2000, which relates pore pressure generation to the energy dissipated within the soil. Based upon the results of approximately 150 cyclic triaxial tests, the writers show that both models are applicable to silty soils. A nonlinear mixed effects model was used for regression analyses to develop correlations for the necessary calibration parameters. The results show that the trends in both and pseudoenergy capacity calibration parameters for the Seed et al. and Green et al. pore pressure generation models, respectively, differ significantly for soils containing less than and greater than fines, consistent with the limiting fines content concept.
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Acknowledgments
This research was supported in part (for the first writer) by a Richardson Summer Research Grant from Valparaiso University. This research was also supported in part (second and third writers) by NSF Grant Nos. UNSPECIFIEDCMMI 0530378 and UNSPECIFIEDCMMI 0644580, funded through the Geotechnical and GeoHazards Systems Program. This support is gratefully acknowledged. Finally, the writers appreciate the review comments by Dr. Aaron Bradshaw and Dr. Chris Baxter on an early draft of the manuscript.
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Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 134 • Issue 10 • October 2008
Pages: 1490 - 1500
Copyright
© 2008 ASCE.
History
Received: Nov 3, 2006
Accepted: Mar 17, 2008
Published online: Oct 1, 2008
Published in print: Oct 2008
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