Water Science and Engineering 2009, 2(2) 52-60  DOI:   10.3882/j.issn.1674-2370.2009.02.006   ISSN: 1674-2370 CN: 32-1785/TV

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Keywords
dynamic stability
shear strength reduction ratio
gravity dam
permanent horizontal displacement
ADINA system
Authors
Da-sheng WANG>
Liao-jun ZHANG
Jian-jun XU
Ming-jie HE
Wei-di ZHANG
PubMed
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Seismic stability safety evaluation of gravity dam with shear strength reduction method

Da-sheng WANG*1;Liao-jun ZHANG2;Jian-jun XU1;Ming-jie HE1;Wei-di ZHANG1

1. East China Investigation & Design Institute, Hangzhou 310014, P. R. China
2. College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, P. R. China

Abstract

A new method of numerical seismic stability safety evaluation for a rock slope is proposed based on the analysis of a gravity dam foundation subjected to earthquake loading. The shear strengths of the weak discontinuities are divided by different shear strength reduction ratios (K) and numerical seismic analysis is carried out after the static analysis is completed. With different K values, the curves of the permanent horizontal displacement of key points of the dam foundation (K-displacement curves) are studied. According to the curve change, the distribution of plastic zones in the foundation, and the slow convergence of the finite element method (FEM), the seismic stability safety factor is defined as K when the gravity dam is in the limit equilibrium state subjected to earthquake loading. These concepts were applied to the evaluation of seismic stability safety of a gravity dam for a hydropower project. The analysis of the example shows that the proposed method is feasible and is an effective method of seismic stability safety evaluation

Keywords dynamic stability   shear strength reduction ratio   gravity dam   permanent horizontal displacement   ADINA system  
Received 2008-12-08 Revised 2009-05-13 Online:  
DOI: 10.3882/j.issn.1674-2370.2009.02.006
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Corresponding Authors: Da-sheng WANG
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