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Date of Publication:2013-01-01

Journal:世界地震工程

Issue:4

Page Number:126-132

ISSN No.:1007-6069

Abstract:The viscoelastic artificial boundary model is widely used to the field of earthquake resistance analysis of water conservancy project and nuclear power station. However, for the analysis of soil-structure dynamic interaction on the sloping site, some problems will be caused while using that method. The large size difference of side facades on the outer boundary will cause inconsistent horizontal seismic force, which may lead to the divergent results or the drift of displacement. In this paper, based on the basic formula of dynamic interaction and seismic input mechanism, a virtual symmetrical sub-structure system is built to solve those problems, which not only satisfies the consistence of whole seismic input on outer boundary but also simulates the seismic wave propagation validly. Finally, the accuracy and the stability of the new method are verified through numerical example on the sloping site.

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