Evaluation of the Performance of Earth Dams During the October 17, 1989 Loma Prieta Earthquake

这是1989年10月洛马普列塔地震后的一次地震。 调查项目在学习这一破坏性的 活动 该项目旨在评估 执行情况，包括解释和分析 地震反应记录，仪器齐全的六个 被洛马普列塔震垮的土坝 1989年10月17日加州7.1级地震。 主震和余震引发的震动 六座大坝上的大多数加速度计（其中一座 部分损坏）提供了最广泛的阵列 的地震反应测量， 美国和国外。 获得的数据将用于（1） 研究连续地震对安全性的影响 土坝的动力特性（剪切 模量和阻尼）从现场性能中提取 在地震期间，通过系统识别技术， 与大坝现有的实验室测量特性 （3）检查现有程序的适当性 用于土坝的地震分析， 观测数据和比较预测结果 （4）传播研究成果， 调查结果，以及（5）记录和提高能力， 评估土坝的安全性。 这项研究将为以下方面提供全面的知识基础： 土坝抗震安全性评价

This is a post Loma Prieta earthquake (Oct. 1989) investigation project in learning from this damaging event. This project is directed toward the evaluation of the performance, including interpretation and analysis of earthquake-response records, of the well-instrumented six earth dams which were shaken by the Loma Prieta, California earthquake (M=7.1) of October 17, 1989. The shaking during the main and after shocks triggered most of the accelerographs on the six dams (one of them is partially damaged) providing the most extensive array of earthquake response measurements yet obtained in the U.S. and abroad. The data obtained will be used to (1) study the effects of sequential earthquakes on the safety of earth dams, (2) correlate dynamic properties (shear modulus and damping) extracted from field performance during earthquakes, via system identification techniques, with existing laboratory-measured properties of the dam materials, (3) verify the adequacy of existing procedures for seismic analysis of earth dams by applying them to observational data and by comparing predicted results with measured responses, (4) disseminate research findings, and (5) document and improve capability to assess the safety of earth dams. The study will provide a comprehensive knowledge base for evaluation of seismic safety of earth dams.