Ground Motion Prediction for Urban Earthqueak Disaster Mitigation

城市减震地震动预测

• 批准号: 0140643
• 负责人: Paul Somerville
• 金额: $ 6.49万
• 依托单位: URS Group, Inc.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-07-15 至 2003-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0140643&HistoricalAwards=false
• 关键词: Ground; Motion; Prediction; Urban; Earthqueak

Although building codes and practices in the United States and Japan have been developed to the point where they provide a large measure of protection of life safety, the recent 1994 Northridge and 1995 Kobe earthquake have demonstrated that near-field ground motions present severe challenges even to structures designed according to current codes. While the response spectrum provides the basis for the specification of design ground motions in all current design guidelines and code provisions, there is a growing recognition that the response spectrum alone does not provide an adequate characterization of near-fault ground motions. This indicates the importance of developing an improved representation of near-fault ground motions using time domain parameters such as the amplitude, period and number of cycles of the near fault pulse, and its energy characteristics, in addition to the response spectrum, for use in analysis and design of structures. The objectives of this project is to develop methods for characterizing near-fault ground motion for use in engineering design and evaluation. The project will be done in collaboration with Professor Iwata of Kyoto University, and colleagues from several other Japanese research organizations, with whom the Principal Investigators have a long term collaborative relationship.

虽然美国和日本的建筑规范和实践已经发展到为生命安全提供很大程度保护的程度，但最近的1994年北岭地震和1995年科比地震表明，近场地震动甚至对根据现行规范设计的结构也提出了严峻的挑战。 虽然反应谱为所有现行设计指南和规范规定中的设计地震动规范提供了基础，但人们越来越认识到，反应谱本身并不能充分表征近断层地震动。 这表明了使用时域参数（如近断层脉冲的振幅、周期和周期数）及其能量特性以及反应谱来改进近断层地震动的表示方法的重要性，以便用于结构的分析和设计。 本项目的目标是开发用于工程设计和评估的近断层地面运动的表征方法。 该项目将与京都大学的岩田教授以及其他几个日本研究机构的同事合作完成，主要研究者与他们有长期的合作关系。