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Date of Publication:2007-01-01

Journal:大连理工大学学报

Affiliation of Author(s):建设工程学部

Issue:1

Page Number:78-84

ISSN No.:1000-8608

Abstract:The dynamic analysis of structure-unbounded foundation system in the time domain often involves excessive finite elements and convolution integrals, and they severely limit the application to large 3-D engineering problems. A sub-regional progressive algorithm for 3-D problems is presented on the basis of the damping solvent extraction method. What's more, some research work was done on the integral arithmetic and storage style of matrices such that convolutional integrals can be fully avoided, the discretization of the system's equations of motion can be simplified and the computation capacity can be expanded. A spherical cavity embedded in full-space under radial even load and the Dagangshan Arch Dam under seismic load were analyzed as verification. In addition, the influence of elastic modulus and input mode of the seismic wave on the response of the dam was discussed. It's shown that the radiation damping of unbounded foundation and scattering effect of the river valley have great influence on the response of structure. In the meantime, the algorithm proposed exhibits good accuracy and efficiency.

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