Pre-Liquefaction and Post-Liquefaction Responses of Axially Loaded Piles in Sands
Publication: International Journal of Geomechanics
Volume 17, Issue 9
Abstract
This paper presents a methodology for predicting the mobilized response of axially loaded piles in sands in the states of pre-liquefaction and post-liquefaction. The proposed procedure calculates shaft and skin resistance of axially loaded piles in sands with and without liquefaction. Sands with limited liquefaction (mostly medium-dense sands), in which the shear strength of the sand drops under a cyclic loading (seismic events), were the focus of this study. The proposed approach provides the load transfer-settlement (t-z) curve and the pile-head axial-load versus pile settlement in sands before and after the development of soil liquefaction. It also considers the variation of pore-water pressure (PWP) in the near-field soil caused by axial loading combined with free-field PWP that is generated by cyclic loading as a postseismic event. The mobilized pile skin and tip resistances were determined on the basis of two constitutive models (of stress–strain relationship) for sands under drained and undrained conditions. A computer code was developed to implement the presented technique.
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Acknowledgments
This research was sponsored by the Alabama Department of Transportation (ALDOT Project 930-769).
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Published In
International Journal of Geomechanics
Volume 17 • Issue 9 • September 2017
Copyright
© 2017 American Society of Civil Engineers.
History
Received: Sep 27, 2016
Accepted: Mar 20, 2017
Published online: Jun 16, 2017
Published in print: Sep 1, 2017
Discussion open until: Nov 16, 2017
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