RAPID: Mapping of Damage in Precast Concrete Buildings from the February 2011 Christchurch, New Zealand Earthquake

这项快速研究响应（Rapid）奖的目的是收集2011年2月新西兰克赖斯特彻奇6.3级地震中两座预制混凝土建筑损坏的易腐数据。该项目由加州大学圣地亚哥分校、亚利桑那大学和坎特伯雷大学的研究人员合作完成。项目团队成员将前往克赖斯特彻奇，通过目视观察对地震破坏（基础、结构和非结构）进行分类。通过收集环境振动和潜在的余震动力响应来确定结构的震后状态。一组从加州大学洛杉矶分校NEES设备借来的加速度计将被临时部署来监测和记录这些振动。传感器将有策略地分布以捕获主要振动模态，并集中在基础上以捕获土-结构相互作用。这些数据将被后处理，用于一级系统识别和表征受损建筑物。对震后破坏进行分类是一种有利于抗震设计的既定做法。法医工程是现代建筑规范的重要催化剂。这项技术推动了地震工程领域的发展，导致了更好的设计、地震细节和施工方法。由于相关的施工和设计，这两座建筑对美国的地震工程研究界和预制混凝土行业具有重要意义。在最先进的抗震设计准则的指导下，这两座建筑按照预期运行，远远超出了新西兰和美国抗震设计理念的生命安全最低要求。结构破坏如预期的那样持续，建筑物的结构完整性完好无损。为了在未来的建筑中复制这种理想的性能，需要在修复之前记录损坏情况，以推进地震工程实践。两国三所大学的研究人员的参与将加强国际一级研究的基础设施。通过加州大学伯克利分校太平洋地震工程研究中心，通过nsf支持的本科生研究经验网站，向本科生介绍国际合作研究、法医工程、传感器、数据采集和地震恢复能力，从而利用教育外展。

The objective of this Rapid Research Response (RAPID) award is to gather perishable data on the damage to two precast concrete buildings during the February 2011 magnitude 6.3 Christchurch, New Zealand, earthquake. This project is a collaboration among researchers from the University of California-San Diego, University of Arizona, and University of Canterbury. Project team members will travel to Christchurch and catalog earthquake damage (foundation, structural and non-structural) through visual observation. The post-earthquake structural state will be determined by means of collecting ambient vibration and potential aftershock dynamic response. An array of accelerometers loaned from the NEES facility at the University of California, Los Angeles will be temporarily deployed to monitor and record these vibrations. Sensors will be strategically distributed to capture the predominant modes of vibration and concentrated at the foundation to capture soil-structure interaction. This data will be post-processed for a first-level system identification and characterization of the damaged buildings. Cataloging post-earthquake damage is an established practice for the benefit of seismic design. Forensic engineering is an essential catalyst of modern building codes. The technique advances the field of earthquake engineering leading to better designs, seismic details, and construction methods. These two buildings are important to the earthquake engineering research community and the precast concrete industry in the United States because of relevant construction and designs. With state-of-the-art seismic design guidelines in place, the two buildings performed as intended, well beyond the life-safety minimum of seismic design philosophy in New Zealand and the United States. Structural damage was sustained as expected, with the buildings' structural integrity remaining intact. To replicate this desirable performance in future buildings, the damage needs documenting to advance the earthquake engineering practice before repairs eliminate the opportunity. Participation by researchers at three universities in two countries will strengthen the infrastructure for research on an international level. Educational outreach is leveraged by introducing an undergraduate student to international collaborative research, forensic engineering, sensors, data acquisition, and seismic resilience with an NSF-supported Research Experiences for Undergraduates site through the Pacific Earthquake Engineering Research Center at the University of California, Berkeley.