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Title: Study on buckling behavior of tapered friction piles in soft soils with linear shaft friction
Authors: Liu, JX
Shao, XF
Cheng, BQ 
Cao, GY
Li, K
Issue Date: 24-Jul-2020
Source: Advances in civil engineering, 24 July 2020, v. 2020, 8865656, p. 1-9
Abstract: The buckling instability of long slender piles in soft soils is a key consideration in geoengineering design. By considering both the linear shaft friction and linear lateral stiffness of the soft soil, the buckling behaviors of a tapered friction pile embedded in heterogeneous soil are extensively studied. This study establishes and validates an analytical model to formulate the equilibrium equations and boundary conditions and then numerically solves the boundary value problem to obtain the critical buckling load and buckling shape by using software Matlab. The effects of boundary conditions, tapered ratio, stiffness ratio, friction ratio, lateral stiffness, and shaft friction on the buckling behavior of the friction pile are extensively explored. This study demonstrates that the buckling load decreases with the increase of friction ratio of the linear shaft friction. There exists an optimal tapered ratio corresponding to the maximum dimensionless buckling load in the tapered friction pile with linear shaft friction. The result means that the linear shaft friction should be considered in designing the tapered friction piles in heterogeneous soils. The results also have potential applications in the fields of growing of tree roots in soils, moving of slender rods in viscous fluids, penetrating of fine rods in soft elastomers, etc.
Publisher: Hindawi Publishing Corporation
Journal: Advances in civil engineering 
ISSN: 1687-8086
EISSN: 1687-8094
DOI: 10.1155/2020/8865656
Rights: Copyright © 2020 Junxiu Liu et al. This is an open access article distributed under the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
The following publication Liu, J. X., Shao, X. F., Cheng, B. Q., Cao, G. Y., & Li, K. (2020). Study on buckling behavior of tapered friction piles in soft soils with linear shaft friction. Advances in Civil Engineering, 2020, 1-9 is available at https://dx.doi.org/10.1155/2020/8865656
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