Analytical and Experimental Studies of the Earthquake Behavior of Concrete Dams

为了研究混凝土坝地震行为中关注的问题，提出了三个研究任务：拱坝伸缩缝的开启和关闭、不均匀地震输入和重力坝的裂缝。前两项任务是计算机研究，将显著增强实习工程师的计算能力。通过对模型重力坝整体的振动台试验，可以深入了解坝体的裂缝扩展机理以及裂缝存在时的动力稳定性。这些测试将在最近捐赠给加州理工学院的小型高频振动台上进行。作为未来的另一项研究任务，水库沉积物实验将在实际水库中进行，旨在提供目前知之甚少的动态水-沉积物相互作用的信息。

Three research tasks are proposed to investigate issues of concern in the earthquake behavior of concrete dams: opening and closing of contraction joints in arch dams, nonuniform seismic input, and cracking in gravity dams. The first two tasks are computer studies and will result in significant enhancement of the computational capabilities available to practicing engineers. The shaking table tests on model gravity dam monoliths will provide insight into the crack propagation mechanism as well as the dynamic stability in the presence of cracks. These tests will be conducted on a small, high-frequency shaking table which was recently donated to Caltech. An additional research task for the future, the reservoir sediment experiments will be conducted in actual reservoirs and are designed to provide information on dynamic water-sediment interaction about which little is presently known.