Title

Dynamic Analysis Of Axisymmetric Foundations On Poroelastic Media

Authors

Authors

G. F. Dargush;M. B. Chopra

Comments

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Abbreviated Journal Title

J. Eng. Mech.-ASCE

Keywords

BOUNDARY ELEMENT METHOD; INTEGRAL-EQUATION METHOD; POROUS-MEDIA; SOIL; CONSOLIDATION; DOMAIN; BEM; BEHAVIOR; STRATUM; Engineering, Mechanical

Abstract

A boundary element method (BEM) is presented for the dynamic analysis of axisymmetric poroelastic media, subjected to time-harmonic excitation. The integral formulation, based on the fundamental solution of Biot's poroelastic theory, eliminates the need for domain discretization for piecewise homogeneous media and automatically satisfies the radiation conditions. Additionally, there is no special treatment required for the incompressibilty that may result under undrained conditions. The axisymmetric formulation that is developed offers further reduction in dimensionality of the problem and provides a convenient framework for investigating the behavior of circular foundations. The BEM algorithm is validated via comparisons with an analytical solution for the dynamic response of a soil column under uniaxial loading and is then utilized to study the dynamic compliance of a shallow circular foundation. The suitability of employing various quasistatic and elastodynamic idealizations is considered in some detail.

Journal Title

Journal of Engineering Mechanics-Asce

Volume

122

Issue/Number

7

Publication Date

1-1-1996

Document Type

Article

Language

English

First Page

623

Last Page

632

WOS Identifier

WOS:A1996UR83100004

ISSN

0733-9399

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