湖南大学学报（自然科学版）Issue(1)：20-28,9.
高层建筑气动弹性模型风洞试验研究
Experimental Study of Aeroelastic Effect on Tall Building
摘要
Abstract
This paper studied the aeroelatic effect on tall buildings.An aeroelastic model was designed and manufactured for wind tunnel tests.With the time-history responses of the structure obtained from the aeroelastic model in the wind tunnel test,we could identify the structural dynamic characteristics by spec-tral analysis,and get the aerodynamic damping from the natural excitation technique method (NExT),the ARMA method,combined with a change in mode order,and then study the rules of aerodynamic damping changing with wind speeds.In a strong wind situation,filter technique was used to analyze the along-wind time-history acceleration response to eliminate the influence of the across-wind energy transfer.And vor-tex-excited resonance existed in the process of identifying the aerodynamic damping.The peak acceleration responses of the rigid models by pressure test and high-frequency-force-balance test,which considered the aerodynamic damping ratios,were very close to the results of the aeroelastic model test.The accuracy of the aeroelastic model test was verified.For the rigid models,irrespective of aerodynamic damping ratios, the peak acceleration responses were much larger than the results of the aeroelastic model test.The biggest difference was 41%.However,in some cases,the aerodynamic damping ratios increased the responses,and the necessity of considering the aerodynamic coupling effect on the wind-resistant design of flexible high-rise buildings has been verified.关键词
高层建筑/气动弹性模型/风洞试验/动力特性/气动阻尼/峰值加速度Key words
tall buildings/aeroelastic model/wind tunnel test/dynamic characteristics/aerodynamic damping/peak acceleration分类
建筑与水利引用本文复制引用
李秋胜,陈凡..高层建筑气动弹性模型风洞试验研究[J].湖南大学学报（自然科学版）,2016,(1):20-28,9.基金项目
国家自然科学基金资助项目（51178179），National Natural Science Foundation of China（51178179）；国家自然科学重大项目 （）
