Full-Scale and Modeled Hurricane Wind Loads on Residential Structures

住宅结构上的全尺寸和模拟飓风风荷载

• 批准号: 0928563
• 负责人: Kurtis Gurley
• 金额: $ 27万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0928563&HistoricalAwards=false
• 关键词: Full; Scale; Modeled; Hurricane; Wind

Scale model tests in boundary layer wind tunnels have been the primary tool for the development of the design wind loads prescribed in codes. However, questions have been raised concerning the ability of wind tunnel methods to replicate the hurricane wind environment and to determine peak loads on low rise structures in hurricanes. This research will address two outstanding issues in the development of risk consistent construction practice in hurricane prone coastal regions. First it will quantify the precision and accuracy of wind tunnel modeling of extreme wind loads on low rise structures, and second it will develop the proper representation of the approaching turbulent hurricane wind field. Both efforts will utilize an existing hurricane wind velocity and pressure load database collected in-field during eleven hurricane seasons. Four wind tunnel facilities will independently produce estimates of loads on scale model houses. Results will be compared with real hurricane wind load data measured on the models? full scale counterpart. The upstream turbulence employed by the wind tunnel facilities will be compared with turbulence data directly measured during land falling hurricanes. Thus the relative influence of scaling effects, approach turbulence, and variability between facilities on the precision and accuracy of extreme wind load estimates will be quantified. The research will produce evidence to foster the professional consensus required to validate or suggest changes to current experimental wind load evaluation methods and prescriptive wind load practice. Research outcomes will improve the scientific methods used to mitigate loss of life and property and promote coastal development consistent with an accurate view of the wind damage risk. Reducing damage and post-storm recovery time via risk consistent construction results in shorter down time for coastal businesses, improving the economic sustainability of hurricane prone coastal regions. Engineering students will participate in the research, and findings will be incorporated into the wind engineering curriculum.

在边界层风洞中进行的缩尺模型试验是制定规范中规定的设计风荷载的主要工具。 然而，人们对风洞方法复制飓风风环境和确定飓风中低层建筑物峰值荷载的能力提出了质疑。这项研究将解决两个突出的问题，在飓风易发沿海地区的风险一致的建设实践的发展。 首先，它将量化低层结构上极端风荷载的风洞建模的精度和准确性，其次，它将开发接近湍流飓风风场的适当表示。这两项工作将利用现有的飓风风速和压力负荷数据库收集在现场在11个飓风季节。 四个风洞设施将独立地产生对比例模型房屋的载荷估计。结果将与模型上测得的真实的飓风风荷载数据进行比较？全尺寸对应物。风洞设施所采用的上游湍流将与登陆飓风期间直接测量的湍流数据进行比较。因此，尺度效应，接近湍流，和设施之间的变化对极端风荷载估计的精度和准确性的相对影响将被量化。该研究将提供证据，以促进专业共识，以验证或建议改变目前的实验风荷载评估方法和规范风荷载实践。研究成果将改善用于减轻生命和财产损失的科学方法，并促进与准确了解风灾风险相一致的沿海发展。通过风险一致的建设减少损失和风暴后恢复时间，缩短沿海企业的停工时间，提高飓风易发沿海地区的经济可持续性。工程专业的学生将参与这项研究，研究结果将纳入风工程课程。