深覆盖层上高堆石坝振动台试验与动力数值分析验证研究  

Shaking-Table Test and Dynamic Numerical Analysis of High Rookfill Dams Constructed on Deep Overburdens

作　　者：窦兴旺 林义兴[2] 夏颂佑[2] 许百立 

机构地区：[1]中国水利电力对外公司,北京100011 [2]河海大学水利水电工程学院,江苏南京210098 [3]水利部水利水电规划设计总院,北京100011

出　　处：《水利水电科技进展》2000年第6期19-22,共4页Advances in Science and Technology of Water Resources

基　　金：高等学校博士点基金资助课题! (编号 :95 2 940 1)

摘　　要：通过深覆盖层上高堆石坝振动台试验与动力数值分析相互验证研究 ,表明考虑坝体地基相互作用的数学、力学模型是合理、正确的 .数值计算能非常方便地调整各种物理力学参数 ,从而又能指导模型试验 .通过振动台试验与数值分析相互验证的成果 ,针对深覆盖层上高堆石坝的动力特性得出系统自振频率随地震历时的变化规律 ,加速度放大系数与地震量级大小的关系 ,以及对《水工建筑物抗震设计规范》中仅要求进行两向地震输入和针对不同的地震烈度采用相同的加速度分布系数提出建议 .By means of combined shaking table test and dynamic numerical analysis of high rockfill dams constructed on deep overburden the mathematical and mechanical models,which are developed and employed in the present paper,reasonable for convenience of modification of various physical parameters,the numerical method is in turn used to direct the execution of model test.Through combined study,some useful conclusions are reached concerning high dams constructed on deep overburdens,such as the variation law of natural frequency with the time history of an earthquake,and the relationship between the acceleration amplification coefficient and the magnitude of an earthquake.Finally,some suggestions are proposed about two dimentional seismic excitation and employment of the same acceleration distribution coefficient for different seismic intensities,which are stipulated in the Anti seismic Norms for Hydraulic Structures.

关 键 词：深覆盖层 高堆石坝 振动台试验 动力数值 

分 类 号：TV323[水利工程—水工结构工程]