CAREER: Bridging the Global Gap on Understanding Downburst Impacts on Buildings: Field Data-Modeling Research and Education for More Resilient Communities

职业：弥合理解下击暴流对建筑物影响的全球差距：为更具复原力的社区进行现场数据建模研究和教育

• 批准号: 2146277
• 负责人: Amal Elawady
• 金额: $ 70.86万
• 依托单位: Florida International University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-03-01 至 2027-02-28
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2146277&HistoricalAwards=false
• 关键词: CAREER; Bridging; Global; Gap; Understanding

This award is funded in whole or in part under the American Rescue Plan Act of 2021 (Public Law 117-2).This Faculty Early Career Development (CAREER) award will advance understanding of thunderstorm downburst wind characteristics and the consequent downburst-induced loading on buildings. Downburst wind events are one of the main causes for high wind intensity associated with thunderstorms, which account for significant civil infrastructure damage and fatalities on a yearly basis in the United States and worldwide. There is a major gap in knowledge, considering that the nature of downburst impact on buildings is different and more complex than for straight-line wind and hurricanes. Field measurements are needed to inform large-scale physical simulations and numerical modeling to assess the vulnerability of buildings subjected to downbursts and help close this knowledge gap. In addition, design recommendations to mitigate the impact of downburst events on buildings are currently not available. This award will leverage available national and international downburst field measurements through integrated research and educational collaborations with the University of Genoa (UniGe) in Italy and the University of Illinois at Urbana Champaign to determine a target range of parameters to inform physical-based simulations of downburst actions on buildings using the National Science Foundation (NSF)-supported Natural Hazards Engineering Research Infrastructure (NHERI) Wall of Wind (WOW) facility at Florida International University. The multi-disciplinary, meteorology, wind and structural engineering, and multi-institution research and educational collaboration comprising this project will offer unique research opportunities for students to engage in state-of-the art STEM studies at an international institution. The research outcomes will enable climate-responsive collaboration and fundamentally transformative concepts to mitigate the impact of downburst-driven hazards on civil infrastructure. This award will contribute to the NSF role in the National Windstorm Impact Reduction Program (NWIRP). This project will address three integrated research and education aims: (1) bridge the gap between meteorology and wind engineering paradigms to inform experimental simulation methods at the NHERI WOW facility to produce realistic downburst flow and to assess the uncertainty in the resulting flow field, (2) analyze and understand the downburst aerodynamic loading on buildings and possible aeroelastic effects using large-scale testing at the NHERI WOW facility, and (3) integrate downburst flow characteristics and aerodynamic and aeroelastic loading research into interconnected educational activities to prepare the next generation of researchers and teachers in the field of windstorm hazards. The virtual exchange through the Collaborative Online International Learning (COIL) module with the UniGe will provide an international educational experience for underrepresented minorities in the STEM field. The internship exchange program with the UniGe will provide mentored international research experiences for U.S. graduate students. These experiences will expose students to a collaborative research environment and will promote the development of diverse and globally competent STEM professionals. The research outcomes will offer unique datasets that will be made available in the NHERI Data Depot (https://www.DesignSafe-ci.org) for use in future research programs. Ultimately, the research findings can improve windstorm design standards to enhance the resiliency of future construction.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该奖项的全部或部分资金根据《2021 年美国救援计划法案》（公法 117-2）提供。该教师早期职业发展 (CAREER) 奖将促进对雷暴下击暴流风特征以及随后的下击暴流引起的负载的了解建筑物。下击暴流风事件是与雷暴相关的高风强度的主要原因之一，雷暴每年都会造成美国和世界各地民用基础设施的重大损坏和死亡。考虑到下击暴流对建筑物影响的性质与直线风和飓风相比不同且更为复杂，因此在知识上存在重大差距。需要进行现场测量来为大规模物理模拟和数值建模提供信息，以评估建筑物遭受下击暴流的脆弱性，并帮助缩小这一知识差距。此外，目前还没有减轻下击暴流事件对建筑物影响的设计建议。该奖项将通过与意大利热那亚大学 (UniGe) 和伊利诺伊大学厄巴纳香槟分校的综合研究和教育合作，利用现有的国家和国际下击暴流现场测量，以确定参数的目标范围，为基于物理的下击暴流模拟提供信息使用美国国家科学基金会 (NSF) 支持的佛罗里达国际大学自然灾害工程研究基础设施 (NHERI) 风墙 (WOW) 设施对建筑物采取行动。该项目涵盖多学科、气象学、风和结构工程以及多机构研究和教育合作，将为学生提供独特的研究机会，让他们在国际机构从事最先进的 STEM 研究。研究成果将使气候响应型合作和根本性变革概念成为可能，以减轻下击暴流驱动的灾害对民用基础设施的影响。该奖项将有助于 NSF 在国家风暴影响减少计划 (NWIRP) 中发挥作用。该项目将实现三个综合研究和教育目标：（1）弥合气象学和风工程范式之间的差距，为 NHERI WOW 设施的实验模拟方法提供信息，以产生真实的下击暴流并评估所产生的流场的不确定性，（ 2) 使用 NHERI WOW 设施的大规模测试来分析和了解建筑物上的下击暴流空气动力载荷以及可能的气动弹性效应，以及 (3) 将下击暴流特性以及空气动力和气动弹性载荷研究整合到相互关联的研究中教育活动，为风暴灾害领域的下一代研究人员和教师做好准备。通过与 UniGe 合作在线国际学习 (COIL) 模块进行的虚拟交流将为 STEM 领域代表性不足的少数群体提供国际教育体验。与 UniGe 的实习交流计划将为美国研究生提供受指导的国际研究经验。这些经历将使学生接触到协作研究环境，并将促进多元化和具有全球竞争力的 STEM 专业人员的发展。研究成果将提供独特的数据集，这些数据集将在 NHERI 数据仓库 (https://www.DesignSafe-ci.org) 中提供，以供未来的研究项目使用。最终，研究结果可以提高风暴设计标准，从而增强未来建筑的弹性。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。