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Dynamic analysis of an axially loaded pile embedded in elastic‐poroelasitc layered soil of finite thickness
Author(s) -
Zheng Changjie,
Gan Shishun,
Kouretzis George,
Luan Lubao,
Ding Xuanming
Publication year - 2020
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.3036
Subject(s) - pile , poromechanics , biot number , axial symmetry , parametric statistics , geotechnical engineering , structural engineering , electrical impedance , geology , mechanics , engineering , mathematics , physics , porosity , porous medium , statistics , electrical engineering
Summary This paper presents an analytical solution for determining the dynamic characteristics of axially loaded piles embedded in elastic‐poroelastic layered soil of finite thickness. The interface between the elastic and poroelastic soil coincides with the groundwater table level, which is explicitly taken into account in the solution. The pile is modelled as elastic one‐dimensional rod to account for the effect of its dynamic characteristics on the response of the soil‐pile system. The solution is based on Biot's poroelastodynamic theory and the classical elastodynamic theory, which we use to establish the governing equations of the soil and pile. Accordingly, the pile base resistance, shaft reaction, and the complex impedance of soil‐pile system are obtained using the method of Hankel integral transformation. Following the validation of the derived solution, we identify the main parameters affecting the vertical dynamic impedance of the pile via a parametric study. The presented method poses as an efficient alternative for quickly estimating the dynamic characteristics of axially loaded piles, without having to resort to complex numerical analyses.