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Date of Publication:2017-01-01

Journal:水利水电技术

Issue:3

Page Number:25-29,51

ISSN No.:1000-0860

Abstract:In order to study the dynamic interaction mechanism among dam,rock foundation and reservoir water under the simulated 3-D status,a dam,rock foundation and reservoir water coupling-based 3-D finite element analysis method is studied and proposed herein.Through the analysis on the theory of the dynamic interaction coupling among the dam,the rock foundation and reservoir water,the coupling condition for dam-reservoir water,the dam-rock foundation-water boundary condition and the analysis for the viscous boundary under the condition of earthquake are given out.By taking the construction of an arch dam as the study case,the stress distributions of the arch dam and the slip fracture plane are calculated with the coupling 3-D finite element method,and then the anti-slide safety factors all over the abutment are calculated with the finite element method and the rigid limit equilibrium method.The result shows that both the maximum arch stress and the hoop stress occur at the downstream face and are 1.43 MPa and 1.50 MPa respectively,and then both are within the affordable range of the materials.The anti-slide safety factor of the rock mass at the abutment of the arch dam obtained through the finite element calculation is 2.78 ～ 3.23,while the anti-slide safety factor calculated through the rigid limit equilibrium method is 2.89 ～ 3.43.Thus,the difference between both of them is very small and it is indicated that the calculation method is effective.The study result can provide a reference for the anti-sliding stability analysis on the abutment of arch dam.

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