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http://dx.doi.org/10.12989/gae.2022.29.1.053

Dynamic analyses for an axially-loaded pile in a transverse-isotropic, fluid-filled, poro-visco-elastic soil underlain by rigid base  

Zhang, Shiping (Key Laboratory of Road Structure and Material of Ministry of Transport (Changsha))
Zhang, Junhui (Key Laboratory of Road Structure and Material of Ministry of Transport (Changsha))
Zeng, Ling (School of Civil Engineering, Changsha University of Science & Technology)
Yu, Cheng (Dalian Bohai detection Co., Ltd)
Zheng, Yun (Institute of Rock and Soil Mechanics, Chinese Academy of Sciences)
Publication Information
Geomechanics and Engineering / v.29, no.1, 2022 , pp. 53-63 More about this Journal
Abstract
Simplified analytical solutions are developed for the dynamic analyses of an axially loaded pile foundation embedded in a transverse-isotropic, fluid-filled, poro-visco-elastic soil with rigid substratum. The pile is modeled as a viscoelastic Rayleigh-Love rod, while the surrounding soil is regarded as a transversely isotropic, liquid-saturated, viscoelastic, porous medium of which the mechanical behavior is represented by the Boer's poroelastic media model and the fractional derivative model. Upon the separation of variables, the frequency-domain responses for the impedance function of the pile top, and the vertical displacement and the axial force along the pile shaft are gained. Then by virtue of the convolution theorem and the inverse Fourier transform, the time-domain velocity response of the pile head is derived. The presented solutions are validated, compared to the existing solution, the finite element model (FEM) results, and the field test data. Parametric analyses are made to show the effect of the soil anisotropy and the excitation frequency on the pile-soil dynamic responses.
Keywords
Boer's poroelastic model; pile; transversely isotropic; poro-visco-elastic; separation of variables;
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Times Cited By KSCI : 2  (Citation Analysis)
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