Experimental & Analytical Studies of Reservoir Compressibility Effects on Arch Dams

先进的分析方法来预测 拱坝的地震反应， 基于各种假设而开发的， 还没有被实验证实。 而 这些数值模型包括 相互作用和水的可压缩性 影响，他们也是敏感的水库 几何形态和储层底部反射 系数 合作研究项目 与中国研究人员提出， 本项目旨在：a）调查水库 拱坝相互作用效应，B）传导 某大型拱坝的现场观测 （三）对中国的经济发展进行定量评价。 分析方法，通过比较 测量和计算结果。 吸收层的反射系数 水库底部和实际地形 需要作为输入的储层 分析预测，将被确定 通过实地调查。 将进行测量 检测水的压缩性和空间 大坝附近地面运动的变化 基础接触。 该激励 这项技术预计将产生更大的 流体动力压力和更好的信息 关于在全球化进程中， 大坝及其基础比已经获得 以前使用偏心质量振动器。 的 实测大坝反应，地基反应， 流体动力压力 与分析预测相比， 目前最好的数学方法， 验证分析的准确性 技术. 研究计划的最终产品 将具体测试程序， 测量吸收系数 库底、实测坝基、 储层响应特性， 相关的分析预测， 对设计目的有用。

Advanced analytical procedures to predict earthquake response of arch dams have been developed based on various assumptions that have not been verified experimentally. While these numerical models include the reservoir interaction and the water compressibility effects, they also are sensitive to reservoir geometry and the reservoir bottom reflection coefficient. A cooperative research project with Chinese researchers is proposed under this project to: a) investigate reservoir interaction effects on arch dams, b) conduct field measurements on a large arch dam in China, and c) make quantitative evaluation of analytical procedures by comparing the measured and calculated results. The reflection coefficient of the absorptive reservoir bottom and the actual topography of the reservoir, which are required as input in analytical predictions, are to be determined by field surveys. Measurements will be made to detect water compressibility and spatial variation of ground motion near the dam- foundation contact. This excitation technique is expected to produce larger hydrodynamic pressures and better information regarding the dynamic interaction between the dam and its foundation than has been obtained previously using eccentric-mass shakers. The measured dam response, foundation response, and the hydrodynamic pressures will be compared with analytical predictions using the best current mathematical procedures to validate the accuracy of the analytical techniques. The final product of the research program will be specific testing procedures to measure absorptive coefficient of the reservoir bottom, measured dam-foundation and reservoir response behavior, and the associated analytical predictions which will be useful for design purposes.