Geomechanics and Engineering

  • 제29권1호
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  • Pages.53-63
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  • 2022
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
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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)
  • 투고 : 2019.10.16
  • 심사 : 2022.02.15
  • 발행 : 2022.04.10
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초록

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.

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과제정보

This work is supported by the National Natural Science Foundation of China [Grant number 51908070, 51978085, 51927814, and 52025085], the Natural Science Foundation of Hunan Province (2020JJ5596), the Excellent Youth Foundation of Natural Science Foundation of Hunan Province (2018JJ1026), the Key Project of Education Department of Hunan Province (17A008), the Training Program for High-level Technical Personnel in Transportation Industry (2018-025), the Open Funds of the National Engineering Laboratory of Highway Maintenance Technology through Grant kfj190103, and the Key Laboratory of Road Structure and Material of the Ministry of Transport through Grant kfj170304 (Changsha University of Science & Technology).

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