RAPID/Collaborative Research: Post-Disaster, Reinforced Concrete Building Performance Data Collection following the April 25, 2015 Nepal Earthquake

RAPID/协作研究：2015 年 4 月 25 日尼泊尔地震后的灾后钢筋混凝土建筑性能数据收集

• 批准号: 1545595
• 负责人: Andreas Stavridis
• 金额: $ 2.4万
• 依托单位: SUNY at Buffalo
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-07-01 至 2017-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1545595&HistoricalAwards=false
• 关键词: RAPID; Collaborative; Research; Post; Disaster

The magnitude 7.8 Ghorka, Nepal earthquake that occurred on April 25, 2015, and the many aftershocks that followed significantly affected Nepal, causing significant human loss as well as widespread structural damage and ground failure. The building stock in the affected regions predominantly consists of poorly engineered unreinforced masonry buildings. However, approximately 25 per cent of the buildings consist of reinforced concrete (RC) frames infilled with masonry walls. This structural system was widely used in the 1920s and 1930s in California as well as in the Pacific Northwest; hence, understanding the damage to this structural system from the Nepal earthquake has direct implications for the seismic performance of a large number of buildings in metropolitan areas in the United States. This rapid response research will focus on post-earthquake assessment of existing RC building frames with masonry infill in Nepal. A team of three researchers and three graduate students will travel to Nepal to collect perishable field data and perform detailed assessments of the seismic performance of 25-30 buildings. The team will acquire, process, and archive architectural and structural data, including building drawings, in residential buildings and critical facilities such as schools and hospitals. The data will be obtained through visual inspections and geo-referenced, three-dimensional (3D), ground-based Lidar scans and Structure from Motion, i.e., 3D reconstructions from two-dimensional photographs, thus providing detailed, quantitative damage measurements. This collected data will be made publicly available to enable future research to advance computational modeling and structural analysis for understanding the seismic performance of RC frame with masonry infill buildings. This collected data will provide new earthquake reconnaissance case studies of RC frame with infill buildings and will be used to evaluate current U.S. guidelines for assessment of existing structures. Moreover, it will serve to inform local rebuilding and recovery efforts in Nepal though close collaboration with local agencies in Nepal. The research team will collaborate with researchers and practicing engineers from Italy, Nepal, and Portugal. This project will also provide foreign research experiences for graduate students and further strengthen ties among the engineering research communities in the United States, Nepal, and European Union.

2015年4月25日发生的尼泊尔廓尔卡7.8级地震以及随后的多次余震对尼泊尔造成了重大影响，造成了重大的人员损失以及广泛的结构破坏和地面破坏。受影响地区的建筑存量主要由工程不良的未加固砖石建筑组成。然而，大约25%的建筑物由钢筋混凝土（RC）框架组成，内部填充砖石墙。这种结构体系在20世纪20年代和30年代在加利福尼亚以及太平洋西北地区被广泛使用；因此，了解尼泊尔地震对这种结构系统的破坏对美国大都市地区大量建筑物的抗震性能具有直接意义。这项快速反应研究将集中在尼泊尔现有混凝土砌体建筑框架的震后评估。一个由三名研究人员和三名研究生组成的小组将前往尼泊尔收集易腐烂的实地数据，并对25-30座建筑物的抗震性能进行详细评估。该团队将获取、处理和存档住宅建筑和关键设施（如学校和医院）的建筑和结构数据，包括建筑图纸。数据将通过目视检查、地理参考、三维（3D）地面激光雷达扫描和运动结构（即二维照片的3D重建）获得，从而提供详细的定量损伤测量。这些收集到的数据将被公开，以使未来的研究能够推进计算建模和结构分析，以了解混凝土框架砌体填充建筑的抗震性能。收集到的数据将为钢筋混凝土框架填充建筑提供新的地震侦察案例研究，并将用于评估当前美国现有结构评估指南。此外，它将通过与尼泊尔当地机构的密切合作，为尼泊尔当地的重建和恢复工作提供信息。该研究团队将与意大利、尼泊尔和葡萄牙的研究人员和执业工程师合作。该项目还将为研究生提供国外研究经验，并进一步加强美国、尼泊尔和欧盟工程研究界之间的联系。