Journal
COMPUTERS & STRUCTURES
Volume 83, Issue 10-11, Pages 769-782Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compstruc.2004.10.015
Keywords
poroelastic soil; piles; pile-groups; pile-soil interaction; dynamic impedance; boundary elements
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A three-dimensional boundary element model is presented for the computation of time-harmonic dynamic stiffness coefficients of piles and pile groups embedded in two-phase poroelastic soils. Piles are modelled as continuum elastic solids and soil as a fluid-filled poroelastic half-space governed by Biot's theory. Piles are bonded to the surrounding medium along the contact surface where rigorous pile-soil interaction conditions are imposed. The technique has been applied to the calculation of vertical and horizontal dynamic impedance functions of piles and 2 x 2 pile groups. Selected numerical results are presented to portray the influence of excitation frequency, pile stiffness, porous medium properties and kind of pile-soil contact conditions. (c) 2004 Elsevier Ltd. All rights reserved.
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