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论文类型：期刊论文

发表时间：2008-03-01

发表刊物：INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS

收录刊物：SCIE、EI

卷号：32

期号：4

页面范围：415-436

ISSN号：0363-9061

关键字：soil-structure interaction; time-domain analysis; wave propagation; damping effect

摘要：Time-domain analysis of dynamic soil-structure interaction based on the substructure method plays an increasing role in practical applications as compared with the frequency-domain analysis. Efficient and accurate modelling of the unbounded soil or rock medium has been a key issue in such an analysis. This paper presents a subregional stepwise damping-solvent extraction formulation for solving large-scale dynamic soil-structure problems in the time domain. Accuracy and efficiency of the formulation are evaluated in detail for a classical problem involving a rigid strip foundation embedded in a half-space. A practical large-scale soil-structure interaction problem, which represents a high concrete gravity dam subjected to seismic load, is then analysed using the proposed method. Various responses of the dam, including time histories of the crest displacement and acceleration and contours of the peak principal stresses within the dam body, are presented. Comparisons are also made between these results with those obtained using other models for the unbounded medium. Copyright (C) 2007 John Wiley & Sons, Ltd.