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

该奖项的目的是收集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受损的易腐烂数据。这个项目是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的。项目团队成员将前往克赖斯特彻奇，通过目测对地震破坏(地基、结构和非结构)进行分类。通过采集环境振动和潜在的余震动力响应来确定震后结构的状态。从加州大学洛杉矶分校NEES设施借来的一组加速度计将被暂时部署来监测和记录这些振动。传感器将战略性地分布，以捕捉主要的振动模式，并集中在基础上，以捕捉土壤-结构相互作用。将对这些数据进行后处理，以便对受损建筑物进行第一级系统鉴定和定性。对震后破坏进行编目是一种既定的做法，以利于抗震设计。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，带来了更好的设计、抗震细节和施工方法。由于相关的建筑和设计，这两座建筑对美国的地震工程研究界和预制混凝土行业都很重要。在制定了最先进的抗震设计指南后，这两座建筑的性能达到了预期的水平，远远超出了新西兰和美国抗震设计理念中的生命安全最低限度。结构破坏一如预期，建筑物的结构完整性保持完好。为了在未来的建筑中复制这种理想的性能，在修复之前，需要记录损坏情况，以推进地震工程实践，消除这种机会。两个国家三所大学的研究人员的参与将加强国际层面的研究基础设施。通过加州大学伯克利分校的太平洋地震工程研究中心，通过NSF支持的本科生研究体验网站，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，从而利用教育扩展。

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.