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

1989 年 10 月 17 日洛马普列塔地震期间土坝性能评估

• 批准号: 9003789
• 负责人: Ahmed Abdel-Ghaffar
• 金额: $ 7.8万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-03-15 至 1992-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9003789&HistoricalAwards=false
• 关键词: Evaluation; Performance; Earth; Dams; During

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.

这是1989年10月洛马普列塔地震后的一个调查项目，旨在从这次破坏性事件中吸取教训。本项目旨在对1989年10月17日加利福尼亚州洛马普里塔地震（M=7.1）中六座仪器完备的土坝进行性能评估，包括地震反应记录的解释和分析。主震期间和震后的震动触发了六座大坝（其中一座部分受损）上的大多数加速度计，提供了迄今为止在美国和国外获得的最广泛的地震反应测量数据。获得的数据将用于(1)研究连续地震对土坝安全的影响，(2)通过系统识别技术，将地震期间从现场性能中提取的动力特性（剪切模量和阻尼）与现有的实验室测量的大坝材料特性相关联。(3)通过将现有程序应用于观测数据，并将预测结果与实测反应进行比较，验证土坝地震分析程序的充分性；(5)记录和提高土坝安全评价能力。该研究将为土坝抗震安全性评价提供全面的知识基础。