Earthquake Analysis, Design, and Safety Evaluation of Concrete Dams

该项目下的研究是为混凝土大坝的地震分析和设计制定改进的程序，这是国家供水和供电基础设施系统的重要组成部分。这项研究解决了一些需要解决的最重要的问题：(1)考虑地震输入的空间变化峡谷周围及其对拱坝反应的影响；(2)在拱坝分析中严格处理坝基相互作用；(3)重力坝整体地震滑动和摇摆位移计算，以及制定改进的倾覆和滑动稳定性标准；(4)改进了水-沉积岩相互作用模型。将开发分析程序和计算机软件，并进行一系列系统的分析，以加深对影响混凝土坝地震反应的各种因素的意义。这次调查的进展和预期结果将使更好地评估混凝土大坝对地震地面运动的反应，从而提高了评估现有结构和拟建造结构的设计的安全性的能力。

The research under this project is to develop improved procedures for the earthquake analysis and design of concrete dams, an important component of the national infrastructure system for supply of water and power. The research addresses some of the most important issues that need to be resolved: (1) consideration of spatial variations in the earthquake input around the canyon and their influence on arch dam response; (2) rigorous treatment of dam-foundation rock interaction in analyzing arch dames; (3) computation of earthquake-induced sliding and rocking displacements of a gravity- dam monolith, and the development of improved criteria for overturning and sliding stability; and (4) improved modeling of water- sediment rock interaction. Analytical procedures and computer software will be developed and a systematic series of analyses will be performed to develop a fundamental understanding of the significance of various factors influencing the earthquake response of concrete dams. The developments and results expected from this investigation will enable better evaluation of the response of concrete dams to earthquake ground motion, thus improving the capability to assess the safety of existing structures and of designs proposed for structures to be constructed.