Full-Scale Study of the behavior of Tall Buildings Under Winds

高层建筑风作用的全面研究

• 批准号: 0085019
• 负责人: Ahsan Kareem
• 金额: $ 24.83万
• 依托单位: University of Notre Dame
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-09-15 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0085019&HistoricalAwards=false
• 关键词: Full; Scale; Study; behavior; Tall

While high-rise construction serves as one of the most challenging projects undertaken by society, tall buildings are one of the few constructed facilities whose design relies solely upon analytical and scaled models, which, though based upon fundamental mechanics and years of research and experience, has yet to be systematically validated in full-scale. To address this issue, several tall buildings in Chicago whose structural systems are most commonly used in high-rise design will be instrumented to measure response characteristics under the action of wind. The instrumentation will include accelerometers and high precision GPS systems. To facilitate unhindered access to real-time measurements, a Java-based internet framework will be developed, permitting the project team, and its advisory board of designers, consultants, and interested researchers, analysis capabilities from any remote location. The subsequent analyses, in total, will provide valuable insight into a variety of response characteristics for tall buildings and permit the systematic validation of existing design practice through the comparison of analytical and wind tunnel response estimates with full-scale observations. Both amplitude-dependent frequency and damping estimates using Wavelet-Based System Identification will be made to shed new light on the dynamic characteristics at varying response levels.

虽然高层建筑是社会承担的最具挑战性的项目之一，但高层建筑是为数不多的建筑设施之一，其设计完全依赖于分析和缩放模型，尽管这些模型基于基本力学和多年的研究和经验，但尚未得到系统的全面验证。为了解决这个问题，芝加哥的几座高层建筑的结构系统在高层设计中最常用，将使用仪器来测量风作用下的响应特性。仪器将包括加速度计和高精度GPS系统。为了方便不受阻碍地访问实时测量，将开发一个基于java的internet框架，允许项目团队及其由设计师、顾问和感兴趣的研究人员组成的顾问委员会从任何远程位置进行分析。总的来说，随后的分析将为高层建筑的各种响应特性提供有价值的见解，并通过分析和风洞响应估计与全面观测的比较，允许对现有设计实践进行系统验证。使用基于小波的系统识别进行振幅相关的频率和阻尼估计，以揭示不同响应水平下的动态特性。