Risk-Based Design of Seismic Isolation for Critical Facilities

基于风险的关键设施隔震设计

• 批准号: 0900324
• 负责人: Henri Gavin
• 金额: $ 23.68万
• 依托单位: Duke University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-07-01 至 2013-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0900324&HistoricalAwards=false
• 关键词: Risk; Based; Design; Seismic; Isolation

Lightly-damped rolling isolation systems are being used to protect mission-critical equipment from shock and vibration hazards. This project will develop experimentally-validated models and seismic qualification guidelines for rolling isolation systems incorporating passive and controllable damping treatments. The passive damping treatments will use elastomeric composites and will be modeled and designed using a combination of experimental and semi-analytic methods. The controllable friction damping will feature magnetically-controlled friction damping incorporating novel magnetically-permeable polymers with high friction coefficients and will be assessed using methods of nonlinear optimal control. The seismic qualification guidelines will be based on methods of probabilistic seismic hazard analysis and will feature detailed statistical models of uniform-hazard earthquake ground motions. This project will resolve persistent issues regarding displacement capacity, damping levels, damping mechanisms, and response-control pertaining to the protection of equipment from earthquake hazards. These results will enable engineers to design and qualify rolling isolation systems to achieve a desired level of hazard mitigation for specific geographic regions and general installation environments. Ultimately, this research will contribute to the mitigation of seismic hazards for facilities that must operate during and after major earthquakes and will thereby improve response and recovery operations. Technology developed in this project will transfer to practice through the development of an industrial consortium and the training of current and future professionals. Graduate students involved in this research will learn and apply advanced methods in dynamics and risk analysis. Undergraduates and high school students will work together to learn methods of experimental dynamics and model validation. The project will undertake the creation of substantial web-based laboratories through which students of any level may investigate the behavior of rolling isolation systems on-line, through physical and numerical simulations.

轻阻尼滚动隔离系统正被用于保护关键任务设备免受冲击和振动危害。 该项目将为采用被动和可控阻尼处理的滚动隔震系统开发经过实验验证的模型和抗震鉴定指南。 被动阻尼处理将使用弹性体复合材料，并将使用实验和半分析方法相结合进行建模和设计。 可控摩擦阻尼将采用磁控摩擦阻尼，结合新的具有高摩擦系数的导磁聚合物，并将使用非线性最优控制方法进行评估。 地震鉴定准则将以概率地震危险性分析方法为基础，并将以均匀危险性地震地面运动的详细统计模型为特色。 该项目将解决有关位移能力、阻尼水平、阻尼机制和与地震灾害设备保护有关的响应控制方面的长期问题。 这些结果将使工程师能够设计和鉴定滚动隔离系统，以实现特定地理区域和一般安装环境的所需风险缓解水平。 最终，这项研究将有助于减轻在大地震期间和之后必须运行的设施的地震危害，从而改善应对和恢复行动。 在这个项目中开发的技术将通过发展一个工业联合体和培训现有和未来的专业人员转移到实践中。 参与这项研究的研究生将学习和应用动力学和风险分析的先进方法。 本科生和高中生将一起学习实验动力学和模型验证的方法。 该项目将建立大量的基于网络的实验室，通过这些实验室，任何级别的学生都可以通过物理和数值模拟在线研究滚动隔离系统的行为。