Workshop on Future Research at Treasure Island, California

9612339德阿尔巴这一行动是为了支持一个小研讨会，以研究如何进一步提高加利福尼亚州金银岛全面地震工程实验的价值。位于加利福尼亚州旧金山湾的人工岛金银岛接近进行全面现场试验的理想条件，以研究软基在强烈地震震动中的反应。它位于圣安德烈亚斯和海沃德断层之间，预计在未来30年内，这两个断层上将发生7级或更大的地震，可能性大于67%。岛上的主要仪器场是国家岩土工程试验场之一，位于300英尺厚的土壤上，其中包括40英尺厚的水力填沙，由软粘土到硬粘土覆盖。它毗邻岩石露头的耶尔巴布埃纳岛，因此可以测量和比较岩石露头、深层基岩和土壤的运动。目前，金银岛“消防站”现场的仪器包括在基岩和地面之间的垂直阵列中的六个加速度计，以及上层潜在可液化的水力填充物中的六个压力计。这些仪器的安装(于1993年完成)伴随着一项广泛的场地表征方案。美国海军、国家科学基金会、联邦公路管理局、美国地质调查局、加州矿产和地质部、电力研究所和加州大学戴维斯分校一直在为金银岛国家岩土工程试验场提供支持。本次研讨会要解决的主要问题是：如何最好地利用强震信息来改进或建立模型来预测软土在强震作用下的行为？需要哪些其他站点信息？这次研讨会的目的是确保在下一次大地震发生时，所有主要信息都已准备就绪，以便研究人员能够快速有效地使用所获得的数据，从而促进改进的软土在强烈地面震动下的行为预测技术的快速发展。***

9612339 De Alba This action is to support a small workshop to examine how the value of the full-scale earthquake engineering experiment at Treasure Island, California, might further be enhanced. Treasure Island, an artificial island in San Francisco Bay, California, approaches ideal conditions for a full-scale field experiment to study the response of soft ground during strong earthquake shaking. It is located between the San Andreas and Hayward faults, on which a magnitude 7 or greater earthquake is expected to occur within the next thirty years, with a probability greater than 67%. The major instrumented site on the island, which is one of the National Geotechnical Experimentation Sites, is located on 300 feet of soil, including 40 feet of hydraulic fill sand, underlain by soft to hard clays. It is adjacent to Yerba Buena island, a rock outcrop, thus permitting motions of the rock outcrop, deep bedrock, and soil to be measured and compared. Currently, instrumentation at the "fire station" site on Treasure Island includes six accelerometers in a vertical array between bedrock and the ground surface, as well as six piezometers in the upper potentially-liquefiable hydraulic fill. The installation of these instruments (completed in 1993) was accompanied by an extensive site characterization program. Support for the Treasure Island National Geotechnical Experimentation Site has been a collaboration between the U.S. Navy, National Science Foundation, Federal Highway Administration, U.S. Geological Survey, California Division of Mines and Geology, Electric Power Research Institute and the University of California at Davis. The major questions to be addressed by this workshop are: What is the best use of strong motion information so as to improve or create models to predict the behavior of soft soils under strong ground motion? What additional site information is required? The goal of this workshop is to assure that all the major pieces of information are in pla ce at the time of the next major earthquake, so that the data obtained can quickly and efficiently be used by researchers, and thus lead to rapid development of improved techniques for predicting the behavior of soft soils under strong ground shaking. ***