Studies of an Earthquake Simulator for the Large Geotechnical Centrifuge at Davis, California

加利福尼亚州戴维斯大型岩土离心机地震模拟器的研究

• 批准号: 9106503
• 负责人: Bruce Kutter
• 金额: $ 19.05万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-09-15 至 1993-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9106503&HistoricalAwards=false
• 关键词: Studies; Earthquake; Simulator; Large; Geotechnical

Centrifuge modeling is a useful technique for studying a wide variety of geotechnical earthquake engineering problems. Centrifuge models of geotechnical structures can be carefully instrumented and subjected to extreme - that is, design level - loading conditions in a repeatable and realistic manner. Specifically, they can be subjected to simulated large earthquakes. This has the potential to provide data that are extremely difficult - and rarely possible - to obtain from full-scale geotechnical structures subjected to naturally occurring large earthquakes. This earthquake simulation capability is already available at five academic institutions in the U.S., but to date only small geotechnical models can be subjected to simulated earthquakes. Researchers at the Rensselaer Polytechnic Institute are currently designing a shaker which will permit the use of intermediate-sized models on the intermediate- sized centrifuge at that institution. This action is to support design studies for an earthquake simulator for the large geotechnical centrifuge at the University of California at Davis. This simulator would have the capacity to subject large models to simulated earthquakes. The unique feature of this centrifuge is its bucket size (6 feet by 7 feet in plan), which permits experiments to be conducted on large models. The large models that can be tested permit: (1) use of more instrumentation while minimizing the influence of instrumentation on model behavior; (2) fine details can be included in the model; and (3) the possibility of conducting tests at lower scale factors to minimize scale effects and to extend the range of modeling of models (a technique to verify that small-scale models are capable of modeling accurately the full-scale behavior). This design study is monitored by an Oversight Committee composed of experts from other institutions. The Oversight Committee will undertake separate design studies; which, when combined with those supported by this award, are expected to address effectively the extremely challenging problems associated with the design of a large centrifuge earthquake simulation facility.

建模是一种有用的技术， 研究各种岩土工程 地震工程问题 离心机 岩土结构模型可以 精心装备， 极限-即设计水平-荷载 以可重复和现实的方式。 具体地说，它们可以受到模拟 大地震。 这有可能 提供了极其困难的数据， 几乎不可能-从全尺寸获得 土工结构物受到自然 发生大地震。 这种地震模拟能力已经是 在五所学术机构提供， 美国，但到目前为止， 模型可以进行模拟 地震 伦斯勒的研究人员 理工学院目前正在设计一个 振动筛将允许使用 中型车型， 小型离心机 这一行动是为了支持设计研究， 大型土工地震模拟装置 加州大学的离心机， 戴维斯 这个模拟器有能力 对大型模型进行模拟 地震 这个的独特之处在于 离心机是它的桶大小（6英尺乘7英尺， 计划），允许实验 在大型模型上进行。 大型模型 可以测试的许可证：（1）使用更多 仪器，同时尽量减少影响 （2）对模型行为的检测;（3）精细 模型中可以包含细节;以及（3） 进行小规模试验的可能性 最大限度地减少规模效应， 模型的建模范围（一种技术 来验证小规模的模型是否能够 精确地模拟全尺度行为）。 本设计研究由监督机构监督 其他国家专家组成的委员会 机构职能体系 监督委员会将 进行单独的设计研究;当 加上这个奖项所支持的， 预计将有效解决 非常具有挑战性的问题， 大型离心机抗震设计 模拟设施