Development of Effective Approaches to the Large-Scale Aerodynamic Testing of Low-Rise Buildings

低层建筑大规模空气动力测试有效方法的开发

• 批准号: 0928740
• 负责人: Arindam Chowdhury
• 金额: $ 15万
• 依托单位: Florida International University
• 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 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0928740&HistoricalAwards=false
• 关键词: Development; Effective; Approaches; Large; Scale

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5)The objective of this project is to develop innovative methods for simple and accurate large-scale aerodynamic testing of low-rise buildings. The research will seek answers to fundamental bluff body aerodynamics issues of interest in civil engineering applications by investigating flow features and effects not reproducible in conventional facilities. These include: effects of important non-dimensional fluid mechanics parameters (e.g., high Reynolds numbers); flow behavior around typical building edges; high-frequency and controlled low-frequency turbulence fluctuations; sudden internal pressure changes; non-stationary gusts; and sharp wind direction changes. The research will result in substantial improvements in the estimation of aerodynamic response and provide the prerequisites for developing realistic standard provisions on wind loads. The objectives will be pursued through controlled and repeatable experiments at large geometric scales, in a new state-of-the-art Wall of Wind (WoW)testing facility capable of producing flow speeds of up to 63 m/s (140 mph). Active and passive controls aimed at producing flows similar to real wind flows will be designed on the basis of detailed wind speed data collected in hurricanes and extratropical storms. The research will develop the scientific underpinnings of low-rise building design, resulting in sustainable communities with enhanced human safety and reductions of property loss and insurance costs. The project will advance discovery by performing cutting-edge research while promoting learning through collaborations from K-12 to undergraduate and graduate students and community college teachers. The activities will involve female students through the Women in Engineering Projects Teams program, African-American students from Florida Memorial University, and Hispanic students from Miami Dade College. A trained workforce will be developed to transfer technology from academia to applications. Results will be disseminated through journals and conferences, WoW workshops, and reports to policy makers and committees, to advance the state of the art and improve current practices and standards.

该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的，该项目的目标是开发创新的方法，对低层建筑进行简单而准确的大规模空气动力学测试。该研究将通过调查在传统设施中无法重现的流动特征和影响，寻求土木工程应用中感兴趣的基本钝体空气动力学问题的答案。这些包括：重要的非量纲流体力学参数的影响（例如，高雷诺数）；典型建筑边缘的流动特性；高频和可控的低频湍流波动；内压突然变化；非平稳阵风;尖锐的风向变化。该研究将大大改进气动响应的估计，并为制定切合实际的风荷载标准规定提供先决条件。这些目标将通过大型几何尺度的可控和可重复实验来实现，在一个新的最先进的风墙（WoW）测试设施中，能够产生高达63米/秒（140英里/小时）的流速。将根据在飓风和温带风暴中收集的详细风速数据，设计旨在产生与实际气流相似的主动和被动控制装置。这项研究将发展低层建筑设计的科学基础，从而形成可持续发展的社区，提高人类安全，减少财产损失和保险成本。该项目将通过进行前沿研究来推进发现，同时通过从K-12到本科生和研究生以及社区大学教师的合作来促进学习。这些活动将包括通过“女性参与工程项目团队”项目的女学生、佛罗里达纪念大学的非裔美国学生和迈阿密戴德学院的西班牙裔学生。将发展一支训练有素的劳动力队伍，将技术从学术界转移到应用领域。研究结果将通过期刊和会议、WoW研讨会以及向政策制定者和委员会提交的报告进行传播，以提高技术水平并改进当前的实践和标准。