Dynamic Soil-Structure Interaction by the Boundary Element Method: A Comparison Study

by Mohsen Mohammadi, Univ of South Carolina, Columbia, SC, USA,
Dimitris L. Karabalis, Univ of South Carolina, Columbia, SC, USA,

Document Type: Proceeding Paper

Part of: Electronic Computation


A comparison study of three Boundary Element Method approaches is attempted on the basis of a typical three-dimensional, dynamic soil-structure interaction problem. The vertical transient response of a square foundation resting on the surface of an elastic half-space and subjected to externally applied dynamic loads is obtained numerically using: i) a direct time domain step-by-step algorithm, ii) a Fourier transform formulation and solution of the problem, and subsequent inversion into the time domain, and iii) a Laplace transform formulation and solution of the problem followed by an inversion into the time domain. This study demonstrates a good agreement in the results obtained by all three methods. Moreover, a detailed discussion of the efficiency of each approach, as related to the required computer effort, is presented.

Subject Headings: Boundary element method | Comparative studies | Soil dynamics | Soil structures | Soil-structure interaction | Dynamic loads | Transient loads | Dynamic structural analysis

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