Response of Earth Dams During the Loma Prieta Earthquake

该项目是美国国家科学基金会/美国地质勘探局在国家减少地震危害方案（NEHRP）下的倡议的一部分，目的是调查1989年10月17日洛马普列塔地震的影响。100多个土坝位于距震源约100公里的范围内。本项目的目的是详细评估两个土坝，这两个土坝有重要的仪器，并且在地震期间触发了仪器。此外，在现有的范围内，其他水坝的记录，以及有关这些水坝的其他信息，也正在收集，并将以一份可供其他用户利用的单一文件提供。这两座大坝分别是150英尺高的圣胡斯托大坝和300英尺高的圣路易斯大坝。这些水坝分别距离能量释放区约40公里和80公里。两个大坝的土壤和地质数据都是可用的。目前正在进行详细的一维和二维分析，以评估构成每个坝基系统的材料的动态剪切应变特性，并审查各种可用的计算分析程序的充分性土坝在地震中的反应。这是第一次可以通过在土坝的几个位置测量地震反应记录来进行如此详细的分析。

This project is part of the NSF/USGS initiative within the National Earthquake Hazard Reduction Program (NEHRP) to investigate the effects of the Loma Prieta earthquake of 17 October 1989. Over 100 earth dams were located within a distance of approximately 100 km from the source of this earthquake. The aim of this project is to evaluate in detail two earth dams that were significantly instrumented and in which the instruments were triggered during the earthquake. In addition, and to the extent available, the recordings from other dams, together with other information about these dams, are also being collected and will be made available in a single document that can be utilized by other users. The two dams are the San Justo Dam, 150 ft high, and the San Luis Dam, which is 300 ft high. These dams are respectively about 40 km and 80 km from the zone of energy release. Soil and geologic data are available for both dams. Detailed one- and two-dimensional analyses are being conducted in order to assess the dynamic shear-strain characteristics of the material comprising each dam-foundation system and to examine the adequacy of various available analytical procedures for calculating the response of earth dams during earthquakes. This is the first time that such detailed analyses can be conducted with measured earthquake response records at several locations of an earth dam.