混凝土面板堆石坝与库水动力相互作用研究

Research on hydrodynamic interaction of concrete face rockfill dams and water system

推导了时域内求解压缩性库水与面板堆石坝相互作用的计算公式．研究了不同动水压力模型对坝水系统自振频率及实测地震作用下坝体动力反应的影响．结果表明，动水压力模型对系统频率的影响不大；坝体动力反应，威氏公式与不可压缩库水模型接近，可压缩库水模型与不考虑动水压力情况接近．地震所激起的动水压力不同模型虽有差别，但数值较小．面板堆石坝的动力分析建议采用可压缩水体动水压力模型．

? The interaction of concrete face rockfill dam water system within time domain is evaluated by the equations derived. Both frequency and the dynamic response obtained from earthquake of dam water system of different hydrodynamic water pressure models are analyzed. The results are shown as follows: the influence of the different hydrodynamic response on the frequency of system is not obvious. When different hydrodynamic pressure models are adopted, the result of Westergaard simplified formula approximates to that of uncompressible liquid model while compressible liquid model approximates to the result where dynamic pressure is neglected. Though the hydrodynamic pressure of different model, excited by earthquake, differs from that of the uncompressible liquid model, the numerical value is small. It is more reasonable to adopt compressible liquid model of dam water coupling system.