期刊
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
卷 47, 期 5, 页码 1309-1328出版社
WILEY
DOI: 10.1002/eqe.3019
关键词
absorbing boundaries; concrete dams; dam-water-foundation rock interaction; nonlinear earthquake analysis; 3-dimensional analysis
A direct finite element method for nonlinear earthquake analysis of 2-dimensional dam-water-foundation rock systems has recently been presented. The analysis procedure uses standard viscous-damper absorbing boundaries to model the semi-unbounded foundation-rock and fluid domains and specifies the seismic input as effective earthquake forces at these boundaries. Presented in this paper is a generalization of the direct finite element method with viscous-damper boundaries to 3-dimensional dam-water-foundation rock systems. Step-by-step procedures for determining the effective earthquake forces starting from a ground motion specified at a control point on the foundation-rock surface is developed, and several numerical examples are computed and compared with independent benchmark solutions to demonstrate the effectiveness of the analysis procedure for modeling 3-dimensional systems.
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