Pile-Supported Wharves Subjected to Inertial Loads and Lateral Ground Deformations. I: Experimental Results from Centrifuge Tests
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 148, Issue 11
Abstract
Five dynamic, large-scale centrifuge tests on pile-supported wharves were used to investigate the time- and depth-dependent nature of kinematic and inertial demands on the deep foundations during earthquake loading. The wharf structures in the physical experiments were subjected to a suite of recorded ground motions and imposed superstructure inertial demands on the piles. Partial to full liquefaction in loose sand resulted in slope deformations of varying magnitudes that imposed kinematic demands on the piles. It was found that the wharf inertia and soil displacements were always in phase during the critical cycle when bending moments were at their maximum values. The test results were analyzed to provide the relative contributions of peak inertial loads and peak soil displacements during critical cycles, and the data revealed the depth dependency of these factors. The results of this study are used in a companion paper to provide recommendations for the design of pile-supported wharves subjected to foundation deformations.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are available at the Center of Geotechnical Modeling at the University of California at Davis (https://cgm.engr.ucdavis.edu) in accordance with funder data retention policies.
Acknowledgments
Support for conducting centrifuge tests was provided by Grant CMS-9702744 from the National Science Foundation (NSF) and Grant SA2394JB from the Pacific Earthquake Engineering Research Center (S. Dickenson, P.I.). Support for recent analyses of the centrifuge tests was provided by Grant CMMI-1761712 from NSF and Grant 171126 from the Deep Foundations Institute (A. Khosravifar, P.I.). Any opinions, findings, and conclusions or recommendations expressed in this article are those of the author(s) and do not necessarily reflect the views of the funding agencies. The authors appreciate the inputs provided by the DFI project advisory board members Dr. Zia Zafir, Mr. Kwabena Ofori-Awuah, Professor Anne Lemnitzer, Dr. Ben Turner, and Dr. Azadeh Bozorgzadeh during this project.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 148 • Issue 11 • November 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Dec 1, 2020
Accepted: May 17, 2022
Published online: Sep 1, 2022
Published in print: Nov 1, 2022
Discussion open until: Feb 1, 2023
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Cited by
- Milad Souri, Arash Khosravifar, Stephen Dickenson, Nason McCullough, Scott Schlechter, Numerical modeling of a pile-supported wharf subjected to liquefaction-induced lateral ground deformations, Computers and Geotechnics, 10.1016/j.compgeo.2022.105117, 154, (105117), (2023).