Vertical Dynamic Response of a Pile Embedded in Layered Transversely Isotropic Unsaturated Soils
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 148, Issue 1
Abstract
This paper investigates the dynamic response of a pile embedded in layered transversely isotropic unsaturated soils subjected to a vertical external excitation. The quintessential Biot biphasic model for saturated media is replaced with a triphasic model for unsaturated media, which simulates more realistic terrestrial subsurface soil characteristics. With the aid of the boundary element method (BEM), the soil around the pile is divided into a series of elements and the Green’s function is obtained by the extended precise integration method (EPIM), while the pile is modeled as a 1D bar based on the finite element method (FEM). Thereafter, the soil–pile interaction formulation is acquired and further solved by the coupling of the BEM-FEM. The correctness of the proposed theory is verified by a comparison example with the existing results. A series of parametric studies are further provided to discuss the influences of degree of saturation, pore size distribution, and air-entry pressure on the dynamic behavior of the pile.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors acknowledge the support of the National Natural Science Foundation of China (Grant No. 41672275).
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Journal of Geotechnical and Geoenvironmental Engineering
Volume 148 • Issue 1 • January 2022
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© 2021 American Society of Civil Engineers.
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Received: Apr 28, 2021
Accepted: Sep 1, 2021
Published online: Oct 20, 2021
Published in print: Jan 1, 2022
Discussion open until: Mar 20, 2022
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