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基于振型分解反应谱法的重力坝抗震安全评价
引用本文:黄宜胜,李建林,常晓林. 基于振型分解反应谱法的重力坝抗震安全评价[J]. 三峡大学学报(自然科学版), 2010, 32(6): 11-16
作者姓名:黄宜胜  李建林  常晓林
作者单位:[1]三峡大学水利与环境学院,湖北宜昌443002 [2]武汉大学水资源与水电工程科学国家重点实验室,武汉430072
基金项目:"十一五"国家科技支撑计划重点项目,三峡大学2008年人才科研启动基金
摘    要:振型分解反应谱法是重力坝抗震计算广泛采用的一种动力分析方法.目前的静动应力叠加原则基本上可概括为强度最不利应力叠加原则和稳定最不利应力叠加原则.金安桥水电站碾压混凝土重力坝左岸坡坝段群抗震安全评价结果表明,对于重力坝,为偏安全计,当进行抗震强度评价时,必须对静动应力叠加采用强度最不利应力叠加原则,而当进行抗震稳定性评价时,必须对静动应力叠加采用稳定最不利应力叠加原则.评价结果显示,金安桥水电站碾压混凝土重力坝的安全性能满足现行抗震规范的要求,这说明了金安桥水电站碾压混凝土重力坝结构设计合理,能够抵御设防地震.

关 键 词:重力坝  振型分解反应谱法  静动应力叠加  金安桥水电站

Seismic Safety Evaluation of Gravity Dam Based on the Mode-decomposition Response Spectrum Method
Huang Yisheng,Li Jianlin,Chang Xiaolin. Seismic Safety Evaluation of Gravity Dam Based on the Mode-decomposition Response Spectrum Method[J]. Journal of China Three Gorges University(Natural Sciences), 2010, 32(6): 11-16
Authors:Huang Yisheng  Li Jianlin  Chang Xiaolin
Affiliation:Huang Yisheng Li Jianlin Chang Xiaolin(1.College of Hydraulic & Environmental Engineering,China Three Gorges Univ.,Yichang 443002,China;2.State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan Univ.,Wuhan 430072,China)
Abstract:The mode-decomposition response spectrum method is a dynamic analysis method widely adopted in the seismic calculation of gravity dam.The current dynamic and static stress superposition principle can be basically summed up as the most disadvantaged stress superposition principle of strength and the most disadvantaged stress superposition principle of stability.The seismic safety evaluation results of the left bank dam monoliths of Jin'anqiao hydropower station show that,for the gravity dam,by the side of safety,when the seismic intensity evaluation is brought forward,the most disadvantaged stress superposition principle of strength should be adopted and when the seismic stability evaluation is brought forward,the most disadvantaged stress superposition principle of stability should be adopted.Evaluation results show that the safety behavior of the dam can meet the requirement of the seismic specification concerned,which indicates that Jin'anquao hydropower station RCC gravity dam can withstand the design earthquake with a reasonable design.
Keywords:gravity dam  mode-decomposition response spectrum method  dynamic and static stress superposition  Jin'anqiao hydropower station
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