›› 2017, Vol. 38 ›› Issue (9): 2757-2763.doi: 10.16285/j.rsm.2017.09.037

• Numerical Analysis • Previous Articles     Next Articles

Comparison of theoretical and numerical solution for vertical vibration of a pile considering transverse inertia effect

HE Wei-jie, YANG Dong-ying, CUI Zhou-fei   

  1. College of Civil Engineering, Suzhou University of Science and Technology, Suzhou, Jiangsu 215011, China
  • Received:2015-10-14 Online:2017-09-11 Published:2018-06-05
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (51508369) and the Natural Science Foundation of Jiangsu Province (BK20150289).

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Abstract: This study investigates the vertical vibration of pile in layered soil under transverse inertia of pile and effects of soil stress diffusion. In the model pile-soil system, Rayleigh-Love rod is applied to simulate the pile, and the soil at pile end is simplified as diffused fictitious soil pile model to reflect the supporting role of soil. Plane strain model is used to describe the interaction between the pile and soil around. Firstly, given the initial and boundary conditions, the dynamic response under half-sine exciting pulse on the pile top is obtained using integral transformation and the recursive method impedance function. A finite element model of the pile-soil system is established to carry out numerical calculation. Then the impact of related parameters, e.g., impulse width of exciting force, pile diameter, length of fictitious soil pile, and vertical interlayers in pile side soil are analyzed by numerical solution (ANSYS/LS-DYNA) and theoretical solution respectively under various working conditions. Finally, the feasibilities of the two solutions are mutually verified.

Key words: transverse inertia, diffused fictitious soil pile, layered soil, finite element method (FEM) analysis

CLC Number: 

  • TU 473

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