Poroelastic model for pile–soil interaction in a half‐space porous medium due to seismic waves
Author(s) -
Lu JianFei,
Jeng DongSheng
Publication year - 2008
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/nag.609
Subject(s) - poromechanics , pile , biot number , half space , porous medium , fredholm integral equation , mechanics , vibration , physics , geotechnical engineering , porosity , integral equation , geology , mathematical analysis , mathematics , acoustics
Abstract In this paper, frequency domain dynamic response of a pile embedded in a half‐space porous medium and subjected to P , SV seismic waves is investigated. According to the fictitious pile methodology, the problem is decomposed into an extended poroelastic half‐space and a fictitious pile. The extended porous half‐space is described by Biot's theory, while the fictitious pile is treated as a bar and a beam and described by the conventional 1‐D structure vibration theory. Using the Hankel transformation method, the fundamental solutions for a half‐space porous medium subjected to a vertical or a horizontal circular patch load are established. Based on the obtained fundamental solutions and free wave fields, the second kind of Fredholm integral equations describing the vertical and the horizontal interaction between the pile and the poroelastic half‐space are established. Solutionof the integral equations yields the dynamic response of the pile to plane P , SV waves. Numerical results show the parameters of the porous medium, the pile and incident waves have direct influences on the dynamic response of the pile–half‐space system. Significant differences between conventional single‐phase elastic model and the poroelastic model for the surrounding medium of the pile are found. Copyright © 2007 John Wiley & Sons, Ltd.