RAPID: Forensic Analysis of Eccentrically Braced Frame Fracture during the February 2011 Christchurch, New Zealand Earthquake

RAPID：2011 年 2 月新西兰基督城地震期间偏心支撑框架断裂的法医分析

• 批准号: 1138634
• 负责人: Amit Kanvinde
• 金额: $ 2.6万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-07-15 至 2012-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1138634&HistoricalAwards=false
• 关键词: RAPID; Forensic; Analysis; Eccentrically; Braced

The principal research objective of this Rapid Response Research (RAPID) award is to identify and understand the conditions that could cause an earthquake-induced fracture in eccentrically braced frame (EBF) steel buildings. For this purpose, multi-scale forensic analysis of the first earthquake failure worldwide of an EBF structure will be conducted. Such a failure occurred in the Christchurch Hospital during the February 2011 Christchurch, New Zealand earthquake. The perishable data to be collected under this RAPID are material specimens from the failed frame before repairs begin. The forensic analysis involves simulations encompassing several scales (from building scale to micromechanical fracture), and will feature mechanical and chemical material tests from the failed frame. The research, if successful, will result in the discovery of new failure modes of EBFs with direct implications for design safety. The broad significance of this research will include the discovery of new failure modes and the consequent enhancement of design considerations, resulting in safer buildings. Outside the immediate discipline of structural engineering, a significant impact is the modeling of a comprehensive end-to-end simulation (encompassing several scales) of an observed field failure. In addition to revealing deficiencies in such end-to-end simulation methodologies, and thus spawning new research, this will have high educational and training value across various levels of academic accomplishment, including technology transfer to industry.

该快速响应研究 (RAPID) 奖项的主要研究目标是识别和了解可能导致偏心支撑框架 (EBF) 钢建筑地震诱发断裂的条件。为此，将对全球首次 EBF 结构地震破坏进行多尺度法证分析。 2011 年 2 月新西兰基督城地震期间，基督城医院就发生过此类故障。 在此 RAPID 下收集的易腐烂数据是修复开始前失效框架的材料样本。 法证分析涉及多个尺度的模拟（从建筑尺度到微机械断裂），并将对失效框架进行机械和化学材料测试。该研究如果成功，将发现 EBF 的新故障模式，对设计安全产生直接影响。 这项研究的广泛意义将包括发现新的失效模式以及随后加强设计考虑，从而产生更安全的建筑。在结构工程的直接学科之外，一个重大影响是对观察到的现场故障进行全面的端到端模拟（包括多个尺度）的建模。除了揭示这种端到端模拟方法的缺陷并由此催生新的研究之外，这还将在各个学术成就层面（包括向行业的技术转移）具有很高的教育和培训价值。