Seismic stability safety evaluation of gravity dam with shear strength reduction method
Seismic stability safety evaluation of gravity dam with shear strength reduction method作者机构：East China Investigation ＆ Design Institute Hangzhou 310014 P. R. China College of Water Conservancy and Hydropower Engineering Hohai University Nanjing 210098 P. R. China
出 版 物：《Water Science and Engineering》 (水科学与水工程（英文版）)
年 卷 期：2009年第2卷第2期
页 面：52-60页
学科分类：08[工学] 080104[工学-工程力学] 0815[工学-水利工程] 0837[工学-安全科学与工程] 0801[工学-力学（可授工学、理学学位）]
基 金：supported by the National Natural Science Foundation of China (Grant No. 90510017)
主 题：dynamic stability shear strength reduction ratio, gravity dam permanent horizontaldisplacement ADINA system
摘 要：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 Kwhen 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.
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