Workshop: Mid-scale RI-EW Concepts for a Tornado-Downburst-Gust Testing Facility to Study Wind/Debris Impact on Civil Infrastructure; Chicago, Illinois; 20-21 October 2022

在美国，非天气性风暴、龙卷风、暴雨和阵风锋每年造成数十亿美元的财产损失，并造成无数人员伤亡。大型龙卷风，强度为增强藤田（EF） 3或更高（136英里/小时或更高，阵风3秒），过去曾袭击过人口密集的中心地区，造成多人死亡，并对建筑物造成重大破坏。降风和阵风锋造成的财产损失同样具有毁灭性。随着城市化的发展和气候变化导致的此类风暴的加剧/频率增加，对民用基础设施的破坏只会在未来增加。为了提高民用基础设施在这些极端风事件中的恢复能力，减少其对社会的经济和社会影响，美国需要一个先进的研究和测试设施，可以模拟真实的风场和风速高达250英里/小时的天气环境。该合同将进行一个工程研讨会，确定一个以大学为基础的国家测试设施的概念，该设施将能够产生与EF1到EF5龙卷风（86-250英里/小时）、强烈下爆（150-175英里/小时）和风速高达100英里/小时的阵风锋相关的风场。这样一个设施，其能力超过现有设施，将能够调查非天气风暴对民用基础设施的影响，在中到大的长度尺度（1/10-1/2），研究近地风场，风载荷，碎片冲击，以及一系列小到大足迹和高度的结构的破坏机制。由爱荷华州立大学组织的为期两天的研讨会将于2022年10月20日至21日在伊利诺伊州芝加哥举行。它将汇集来自大学、政府机构和工业界的25-30名参与者，讨论中型研究基础设施的科学需求和要求以及概念设计。研讨会将促进(a)提高对非天气风的瞬态特征及其造成结构破坏的危害的认识，(b)理解非天气风中风-结构和碎片-结构相互作用的力学，(c)需要新的实验数据及其与计算力学的结合，以改进结构建模和损伤预测，(d)讨论设施部件和仪器，(e)为设计新设施制订项目执行计划。研讨会的成果将综合在一份报告中，该报告将通过自然灾害工程研究基础设施（NHERI）数据仓库（https://www.DesignSafe-ci.org）.This)传播给工程研究界，该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

Non-synoptic windstorms, tornadoes, downbursts, and gust fronts annually cause billions of dollars of property damage and inflict numerous fatalities and injuries in the United States. Major tornadoes, with an intensity of Enhanced Fujita (EF) 3 or greater (136 mph or greater, three-second gust), have struck large population centers in the past causing multiple fatalities and significant damage to structures. Property damage from downbursts and gust fronts are equally devastating. Damage to civil infrastructure will only increase in the future with growing urbanization and increased intensification/frequency of such windstorms because of climate change. To improve the resilience of civil infrastructure in these extreme wind events and reduce their economic and social impacts on society, an advanced research and testing facility is needed in the United States that can simulate realistic wind fields and a weather-like environment with wind speeds up to 250 mph. This award will conduct an engineering workshop that will identify the concepts for a university-based national testing facility that will be capable of generating wind fields associated with EF1 to EF5 tornadoes (86-250 mph), intense downbursts (150-175 mph), and gust fronts with wind speeds up to 100 mph. Such a facility, with capabilities that exceed those of existing facilities, would enable investigation of the impacts of non-synoptic windstorms on civil infrastructure at mid-to-large length scales (1/10-1/2) for studying the near-ground wind field, and wind loading, debris impact, and damage mechanisms for a range of structures with small to large footprints and heights. The two-day workshop, organized by Iowa State University, will be held in Chicago, Illinois, on October 20-21, 2022. It will bring together 25-30 participants from universities, government agencies, and industry to discuss the scientific needs and requirements and conceptual design of the mid-scale research infrastructure facility. The workshop will facilitate (a) advancement of knowledge of the transient characteristics of the non-synoptic winds and the hazards they pose that cause structural damage, (b) understanding of the mechanics of the wind-structure and debris-structure interactions in non-synoptic winds, (c) need for new experimental data and its integration with computational mechanics to improve structural modeling and damage prediction, (d) discussion of facility components and instrumentation, and (e) development of a Project Execution Plan (PEP) for the design of a new facility. The workshop outcomes will be synthesized in a report that will be disseminated to the engineering research community via the Natural Hazards Engineering Research Infrastructure (NHERI) Data Depot (https://www.DesignSafe-ci.org).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.