偏心超高层建筑的风振研究  

Research on Wind-Induced Response of Structurally Asymmetric Tall Buildings

作　　者：唐意[1,2] 顾明[1] 金新阳[2] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092 [2]中国建筑科学研究院,北京100013

出　　处：《同济大学学报（自然科学版）》2010年第2期178-182,316,共6页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金委创新研究群体科学基金资助项目(50621062);国家自然科学基金重大研究计划重点资助项目(90715040)

摘　　要：基于结构随机振动理论,考虑了结构振型耦合以及风力相关性的影响,推导了偏心超高层建筑弯扭耦合风振计算公式.利用风洞试验获得的脉动风力数据计算了矩形截面偏心结构的风振响应,从舒适性角度研究偏心位置和截面厚宽比对结构风致振动加速度的影响.研究结果表明,当建筑短边迎风且刚心和质心在顺风向偏离时,风振响应显著增大.Based on random vibration theory, a method is developed for wind induced lateral-torsion coupled response of structurally asymmetric tall buildings, in which the integrated effects of mode coupling and wind force correlations are also taken into account. With the wind pressures data on rectangular tall buildings measured with a wind tunnel test, the coupled responses of the rectangular tall buildings are calculated. The effects of eccentricity location and side ratio are also examined for serviceability. The results indicate that the alongwind eccentricity between centers of mass and rigidity for a building whose windward breadth is shorter than its depth may result in a great increase in wind-induced responses.

关 键 词：偏心超高层建筑 弯扭耦合 风致振动 

分 类 号：TU312.1[建筑科学—结构工程]