| 混凝土重力坝地震响应数值分析方法 |
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| 引用本文： | 邱流潮,刘桦,金峰.混凝土重力坝地震响应数值分析方法[J].河海大学学报(自然科学版),2006,34(1):65-68. |
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| 作者姓名： | 邱流潮 刘桦 金峰 |
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| 作者单位： | 1. 上海交通大学船舶海洋与建筑工程学院,上海,200030
2. 清华大学水利水电工程系,北京,100084 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 给出了混凝土重力坝动力响应分析的时域有限元法.其中,地震波的输入方法以及无限地基辐射阻尼的模拟方法都是在柱面波动方程的基础上建立起来的.这种方法先通过对无限地基的人工截断获得有限计算域,然后沿人工边界布置一系列弹簧和阻尼器来模拟无限地基,在有入射波的边界上用与入射波速成正比的等效力来实现地震动的输入.数值算例表明,该方法简单有效,易于实现,并能够保证一定的精度.
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| 关 键 词： | 混凝土重力坝 地震响应 时域分析 地震输入 辐射阻尼 有限元法 |
| 文章编号： | 1000-1980（2006）01-0065-04 |
| 收稿时间： | 2005-05-30 |
| 修稿时间： | 2005-05-30 |
Numerical method for analysis of seismic response of concrete gravity dams |
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| QIU Liu-chao,LIU Hua,JIN Feng.Numerical method for analysis of seismic response of concrete gravity dams[J].Journal of Hohai University (Natural Sciences ),2006,34(1):65-68. |
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| Authors: | QIU Liu-chao LIU Hua JIN Feng |
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| Institution: | 1. Department of Engineering Mechanics, Shanghai Jiao Tong Univeristy , Shanghai 200030, China; 2. Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | A time-domain finite element method for seismic response analysis of concrete gravity dams was presented.The methods for treatment of earthquake input and modeling of radiation damping in infinite foundation were established based on cylindrical wave equation.In this method,a finite domain was obtained by truncation of the infinite foundation,and the truncated foundation was simulated by a series of dashpots and springs along the boundaries.Then,the earthquake inputs on the boundary with incident waves were simulated with an equivalent force directly proportional to the velocity of incident waves.Case studies show the validity and accuracy of the present method. |
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| Keywords: | concrete gravity dam seismic response time-domain analysis earthquake input radiation damping FEM |
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