EAGER: Instrumentation and Modeling of Seismic Isolation in Aftershocks

EAGER：余震隔震的仪器和建模

• 批准号: 1258466
• 负责人: Henri Gavin
• 金额: $ 16.99万
• 依托单位: Duke University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-10-01 至 2015-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1258466&HistoricalAwards=false
• 关键词: EAGER; Instrumentation; Modeling; Seismic; Isolation

The research objective of this project is to measure the long-term seismic responses of the base-isolated Christchurch Women's Hospital, located in Christchurch, New Zealand, and to use these measurements, along with computational models, to assess the relative effects of soil-foundation-structure interactions with liquefying soil, for interactions between adjacent buildings, and for interactions across the isolation interface. Nine networked triaxial accelerometers and three displacement sensors, installed at three levels within the structure, will allow for remote monitoring of aftershock responses and rapid data processing. The database of high fidelity measurements from this building will be combined with detailed computer simulations of the structure, isolation system, foundation, and supporting soft soil. The project team, including researchers in structural and geotechnical engineering at the University of Canterbury, Christchurch, New Zealand, engineers from firms in New Zealand conducting geotechnical field investigations at the building site, and hospital staff, will collaborate on the deployment and remote monitoring of the instrumentation, the development and application of modern system identification techniques to the data, and the development of nonlinear numerical models to examine the processes governing the response of this structure.Vibration measurements obtained in situ from buildings during actual earthquakes are invaluable in assessing and improving the performance of earthquake protection systems. Following the large earthquakes of 2010 and 2011, Christchurch has experienced, and continues to withstand, hundreds of earthquake aftershocks per year. This project seizes the unique opportunity to capture perishable data from the seismically-isolated Christchurch Women's Hospital, a building designed to be particularly earthquake-resistant. While this facility is providing uninterrupted service throughout this sequence of earthquakes, some aspects of the dynamic response of this structure are unanticipated. By combining measurement and analysis, researchers will identify the aspects of this structure leading to the measured and observed motions. These results will bear on the design of new base-isolated structures on soft soils in Christchurch, New Zealand and in other seismic regions worldwide. Knowledge gained from this project will contribute to best practices for the implementation of seismic isolation systems. Data obtained from this project will be archived and made publicly available in the NEEShub Project Warehouse (http://nees.org/warehouse).

该项目的研究目标是测量位于新西兰克赖斯特彻奇的克赖斯特彻奇女子医院隔震基地的长期地震反应，并使用这些测量和计算模型来评估土-基础-结构相互作用与液化土壤、相邻建筑物之间的相互作用以及隔震界面上的相互作用的相对影响。9个联网的三轴加速度计和3个位移传感器安装在结构内的三层，将允许远程监测余震反应和快速数据处理。这座建筑的高保真测量数据库将与结构、隔震系统、基础和支撑软土的详细计算机模拟相结合。该项目团队包括新西兰克赖斯特彻奇坎特伯雷大学的结构和岩土工程研究人员、在建筑工地进行岩土现场勘察的新西兰公司的工程师和医院工作人员，他们将合作部署和远程监测仪器，开发和应用现代系统识别技术来处理数据，并开发非线性数值模型来检查控制该结构响应的过程。在实际地震中从建筑物现场获得的振动测量对于评估和改善地震防御系统的性能是非常宝贵的。在2010年和2011年的大地震之后，克赖斯特彻奇每年经历并继续经受住数百次地震余震。这个项目抓住了独特的机会，从地震隔离的克赖斯特彻奇妇女医院捕捉易腐烂的数据，这是一座特别抗震的建筑。虽然该设施在整个地震序列中提供不间断的服务，但该结构的动态响应的某些方面是意想不到的。通过将测量和分析相结合，研究人员将确定导致测量和观察到的运动的该结构的各个方面。这些结果将对新西兰克赖斯特彻奇和世界其他地震区的软土地基上的新型基础隔震结构的设计产生影响。从该项目中获得的知识将有助于实施隔震系统的最佳做法。从该项目获得的数据将被存档，并在NEEShub项目仓库(http://nees.org/warehouse).)公开提供