Identification and Modeling of Earthdam Response During Northridge, January 17, 1994 and Previous Earthquakes

1994 年 1 月 17 日北岭地震和之前地震期间的土坝响应识别和建模

• 批准号: 9416248
• 负责人: Ahmed Elgamal
• 金额: $ 6万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-09-15 至 1996-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9416248&HistoricalAwards=false
• 关键词: Identification; Modeling; Earthdam; Response; During

9416248 Elgamal Earthquake acceleration histories were recorded on and around eight well instrumented earth dams within a 50 mile radius of the 1994 Northridge earthquake epicenter. These dams were also subjected to strong ground shaking during the 1971 San Fernando, and the 1987 Whittier earthquakes. A large data set of valuable input and response acceleration histories is currently available (Northridge, Whittier, and San Fernando earthquakes) for calibration and verification of simplified as well as elaborate computational analysis procedures. Past analyses of the San Fernando and Whittier recorded accelerations have significantly contributed to our understanding of earth dam seismic response mechanisms; contributions which were possible only through analyses of actual full-scale seismic response. The recently recovered Northridge acceleration histories offer a unique opportunity to build on the results of thorough studies conducted earlier for the Santa Felicia, Puddingstone, Cogswell and Brea dams. The objective of this project is to: (i) conduct a predictive (Class A/B) computational analysis for each dam using the dynamic properties identified earlier from the San Fernando and/or Whittier earthquakes, (ii) critically assess the previously identified earth dam characteristics in view of the newly acquired Northridge data set (of different shaking amplitudes and frequency contents), (iii) define simplified analysis/design procedures, and clearly identify any associated limitations and/or strengths, and (iv) document the identified properties in a database form that includes a large number of modern earth/rockfill dams in Northern California (Lexington, Anderson and Long Valley dams), Southern California (Santa Felicia, Puddingstone, and Brea dams), and Mexico (La Vilita and El Infiernillo dams). ***

9416248 Elgamal地震加速度历史记录在1994年北岭地震震中50英里半径内的八座仪器齐全的土坝及其周围。 这些水坝在1971年圣费尔南多地震和1987年惠蒂尔地震中也受到强烈的地面震动。 一个有价值的输入和响应加速度历史的大型数据集目前（北岭，惠蒂尔和圣费尔南多地震）的校准和验证简化以及精心设计的计算分析程序。 过去对圣费尔南多和惠蒂尔记录的加速度的分析，极大地促进了我们对土坝地震响应机制的理解;只有通过对实际全尺寸地震响应的分析，才有可能做出贡献。 最近恢复的北岭加速度历史提供了一个独特的机会，建立在对圣费利西亚，普丁斯通，科格斯韦尔和布雷亚大坝进行彻底的研究结果。 该项目的目标是：（一）预测（A/B级）使用从圣费尔南多和/或惠蒂尔地震中识别的动力特性对每个大坝进行计算分析，（ii）根据新获得的北岭数据集，对先前识别的土坝特性进行严格评估（不同的振动幅度和频率内容），（iii）定义简化的分析/设计程序，并明确识别任何相关的限制和/或优势，以及（iv）以数据库形式记录所识别的特性，该数据库形式包括北方加州的大量现代土石坝（列克星敦、安德森和长谷大坝）、南加州（圣费利西亚、普丁斯通和布雷亚大坝）和墨西哥（拉维利塔和埃尔因菲尔尼约大坝）。 ***