广州西塔台风特性及风致结构振动现场实测研究  

Field measurement study on wind characteristic and wind-induced vibration response of Guangzhou West Tower during a typhoon

作　　者：杨雄[1,2] 吴玖荣[1,2] 傅继阳[1,2] 徐安[1,2] 李秋胜[3] 肖仪清[4] 

机构地区：[1]广州大学 [2]广州大学淡江大学结构工程灾害与控制联合研究中心,广东广州510006 [3]香港城市大学建筑系,香港999077 [4]哈尔滨工业大学深圳研究生院土木工程学院,广东深圳518055

出　　处：《广州大学学报（自然科学版）》2011年第3期72-77,共6页Journal of Guangzhou University:Natural Science Edition

基　　金：国家自然科学基金项目(50778082;51078096;50978063);广东省科技计划项目(国际合作)(2009B050200015);教育部新世纪优秀人才支持计划项目(NCET-09-0082);广东自然科学基金项目(07300081)资助

摘　　要：广州西塔楼高432 m共103层,属目前华南地区第一高楼,在台风"鲇鱼"的影响下,对其台风特性及风致结构振动进行了现场同步实测,获得了其风场特性、结构动力特性以及风致结构振动响应等相关结果.结果验证了湍流强度随平均风速增大而减小、阵风因子随湍流强度增大而增大等规律,且实测的顺风向与侧风向脉动风速谱均符合Von Karm an谱.通过风作用下楼层顶部加速度数据分析,结果表明测试的结构模态参数结果与有限元分析吻合.通过对此建筑物风场特征和风致振动的同步实测结果分析,讨论了楼顶平均风速和加速度均方根响应之间的关系.上述实测分析结果为超高层建筑设计及相关研究提供了参考.The Guangzhou West Tower,which is 432 m high and 103 stories, is the tallest building in South Eastern China. The wind characteristics and wind-induced vibration of this tall building were simultaneously measured when Typhoon Megi affected this tall building. Some results for wind characteristics at about 440 m height were obtained from the statistical analysis on the measured wind data：①The turbulence intensity decrea- ses with the increasing mean wind speed, while gust factor increases with the increased turbulence intensity;② The measured power spectral density of fluctuation wind speed in longitudinal and transversal direction could be fitted very well by Von Karman spectrum. The statistical analyses on the measured wind-induced acceleration response atop the building have shown that the measured natural frequencies are very close to the numerical FEM analyzed results. Finally the relationship between the wind-induced acceleration response atop the building and mean wind speed were obtained from the measured data.

关 键 词：原型实测 结构风效应 台风特性 风致振动 

分 类 号：TU311[建筑科学—结构工程]