拱坝随机动力分析方法的比较  

Comparison of random vibration analysis methods for arch dam

作　　者：吴健[1] 方修君[1] 金峰[1] 徐艳杰[1] 

机构地区：[1]清华大学水利水电工程系,北京100084

出　　处：《水利学报》2006年第6期740-745,共6页Journal of Hydraulic Engineering

基　　金：国家自然科学基金资助项目(50209004)

摘　　要：本文对拱坝的随机动力分析的3种方法,即反应谱方法、蒙特卡罗法和随机振动法做了比较,分析了每种方法的特点。通过算例证明,在坝基交界面输入一致的地震动条件下,3种方法的峰值应力均值计算结果是接近的。比较了随机振动法和蒙特卡罗法的概率分布曲线和计算效率,建议使用随机振动法获得全概率动力响应。Three methods for random vibration analysis on arch dam including the response spectrum method, Monte-Carlo simulation method and random analysis method were compared. The characteristic of each method was analyzed. The analyses on a typical arch dam show that the computed mean responses by using these three methods were approximately the same. The computation efficiency of the random analysis based on pseudo excitation method was higher than that of Monte-Carlo simulation method. It is preferable to adopt the random analysis method in computing the random response of dams with arbitrary probability.

关 键 词：随机振动 反应谱 蒙特卡罗 虚拟激励 拱坝 

分 类 号：TV642.4[水利工程—水利水电工程]