Vertical Vibration Analysis of a Pile Group in Multilayered Poroelastic Soils with Compressible Constituents

Abstract

This paper will investigate the vertical vibration of a pile group connected to a rigid cap in multilayered poroelastic soils with compressible constituents. Individual piles in the pile group are modeled as one-dimensional bars and discretized into uniform elements based on the finite element method (FEM). Considering the compatibility condition between the pile group and the layered poroelastic soils with compressible constituents, solutions for the dynamic interaction problem will be derived. The resulting numerical solutions agreed closely with the existing solutions. Selected numerical examples will be provided to demonstrate the effects of the pile–soil stiffness ratio, pile spacing, compressibility parameters, and stratified property of the poroelastic soils on the vertical dynamic response of a pile group.