A Limit Solution for Predicting Side Resistance on Rock-Socketed Piles
Publication: Journal of Engineering Mechanics
Volume 148, Issue 1
Abstract
The mobilization of side resistance of rock-socketed pile strongly depends on the shear behavior of the pile-rock interface. In this study, an asperity-based model was developed to investigate essential responses of interface shear, where asperities develop from sliding with interface dilation to residual shear under the condition of constant normal stiffness (CNS). The emphasis was on quantifying the magnitude of interface dilation in terms of limit analysis solutions. Followed by the proposed upper bound (UB) and lower bound (LB) solutions for asperity collapse loads, the mean value was chosen for approaching the potential exact solution. Laboratory experiments of direct shear tests under CNS conditions were also carried out by the authors, and observations were regarded as evidence that the proposed modeling provided a rational explanation of shear behavior for a pile-rock interface. Parametric studies indicated that two key factors, roughness and material properties, significantly impact the mobilization of ultimate side resistance.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This research is a part of work carried out by grants from the National Natural Science Foundation of China (Nos. 51978255 and 52108317).
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Published In
Journal of Engineering Mechanics
Volume 148 • Issue 1 • January 2022
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© 2021 American Society of Civil Engineers.
History
Received: Jun 4, 2021
Accepted: Sep 17, 2021
Published online: Nov 2, 2021
Published in print: Jan 1, 2022
Discussion open until: Apr 2, 2022
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