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

研讨会：用于研究风/碎片对民用基础设施影响的龙卷风-下击暴流-阵风测试设施的中型 RI-EW 概念；

• 批准号: 2233640
• 负责人: Partha Sarkar
• 金额: $ 5万
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-08-15 至 2023-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2233640&HistoricalAwards=false
• 关键词: Workshop; Mid; scale; RI; EW

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.

非天气性风暴、龙卷风、下击暴流和阵风锋每年都会在美国造成数十亿美元的财产损失，并造成大量人员伤亡。强度为增强型藤田 (EF) 3 或更高（136 英里/小时或更高，阵风三秒）的大型龙卷风过去曾袭击过大型人口中心，造成多人死亡和建筑物严重损坏。下击暴流和阵风锋造成的财产损失同样具有毁灭性。随着城市化的不断发展以及气候变化导致此类风暴的加剧/频率的增加，未来对民用基础设施的损害只会增加。为了提高民用基础设施在这些极端风事件中的抵御能力，减少其对社会的经济和社会影响，美国需要先进的研究和测试设施，能够模拟真实的风场和风速加快的类似天气的环境至 250 英里/小时。该奖项将举办一个工程研讨会，确定基于大学的国家测试设施的概念，该设施将能够产生与 EF1 至 EF5 龙卷风（86-250 英里/小时）、强烈下击暴流（150-175 英里/小时）、以及风速高达 100 英里/小时的阵风锋。该设施的能力超过了现有设施，可以在中到大尺度（1/10-1/2）内调查非天气风暴对民用基础设施的影响，以研究近地面风场、风荷载、碎片冲击以及一系列占地面积和高度从小到大的结构的损坏机制。为期两天的研讨会由爱荷华州立大学组织，将于 2022 年 10 月 20 日至 21 日在伊利诺伊州芝加哥举行。来自大学、政府机构和行业的 25 至 30 名参与者将齐聚一堂，讨论科学需求和中型研究基础设施的要求和概念设计。该讲习班将促进（a）增进对非天气风的瞬态特征及其造成结构损坏的危害的了解，（b）了解非天气中风-结构和碎片-结构相互作用的机制。天气风，(c) 需要新的实验数据及其与计算力学的集成，以改进结构建模和损伤预测，(d) 设施组件和仪器的讨论，以及 (e) 为新设施的设计。研讨会成果将汇总在一份报告中，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) 分发给工程研究界。该奖项反映了 NSF 的法定使命通过使用基金会的智力优点和更广泛的影响审查标准进行评估，并被认为值得支持。