RESEARCH ARTICLE


Soil-Pile Dynamic Interaction in the Viscous Damping Layered Soils



Yinhui Wang1, Kuihua Wang2, Zhixiang Zha*, 1, Renbo Que2
1 Department of Civil Engineering and Architecture, Ningbo Institute of Technology, Zhejiang University, Ningbo, 315100, China
2 MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou, Zhejiang, 310058, China


Article Metrics

CrossRef Citations:
5
Total Statistics:

Full-Text HTML Views: 134
Abstract HTML Views: 353
PDF Downloads: 160
Total Views/Downloads: 647
Unique Statistics:

Full-Text HTML Views: 101
Abstract HTML Views: 220
PDF Downloads: 144
Total Views/Downloads: 465



Creative Commons License
© 2011 Wang et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Department of Civil Engineering and Architecture, Ningbo Institute of Technology, Zhejiang University, Ningbo, 315100, China; Tel: +86-574-88229069; Fax: +86-574-88229587; E-mail: zhazx71@126.com


Abstract

Modeling surrounding soil as a three-dimensional axisymmetric continuum and considering its wave effect, soil-pile dynamic longitudinal interaction in viscous layered soils is studied. The pile is assumed to be vertical, elastic and of uniform section, and the soil is layered and visco-elastic. Longitudinal vibration of pile in viscous damping layered soils undergoing arbitrary load is theoretically investigated. By taking the Laplace transform, the question can be solved in frequency domain. Utilizing two potentials combined with impedance transfer functions, analytical solutions for both the impedance function and mobility at the pile head in frequency domain are yielded. With the convolution theorem and inverse Fourier transform, a semi-analytical solution of velocity response in time-domain undergoing a half-cycle sine pulse force is derived. Based on the solutions proposed herein, the effects of variety of soil modulus on mobility curves and reflection wave curves are emphatically discussed. The results shows that there is a smaller peak between every two adjacent larger peaks on the mobility curve in layered soil, and larger peak cycle reflects the location where the modulus of the soil varies abruptly. The conclusions can provide theoretical guidance for non-destruction test of piles.

Keywords: Soil-pile dynamic interaction, Layered soils, Viscous damping, Admittance curves, Mobility curves, Reflection wave curves.