北京奥林匹克中心演播塔TMD风振控制  

TMD vibration control of Beijing Olympic Center Broadcast Tower under fluctuating wind load

作　　者：黄瑞新[1,2] 李爱群[1,2] 张志强[1,2] 范重[3] 刘先明[3] 

机构地区：[1]东南大学土木工程学院,南京210096 [2]东南大学混凝土与预应力混凝土结构教育部重点实验室,南京210096 [3]中国建筑设计研究院,北京100044

出　　处：《东南大学学报（自然科学版）》2009年第3期519-524,共6页Journal of Southeast University：Natural Science Edition

基　　金：国家"十一五"科技支撑计划资助项目(2006BAJ03A04)

摘　　要：以北京奥林匹克中心演播塔为工程背景,研究了调频质量阻尼器(TMD)对高耸电视塔在强风作用下风振响应的振动控制.将该塔的三维空间模型简化为二维模型;基于随机振动理论,利用M.Shinozuka方法对该塔的脉动风荷载进行数值模拟,得到了脉动风荷载时程曲线;在此脉动风荷载作用下,SAP2000三维空间模型的计算结果和二维模型的计算结果相吻合,而且利用二维模型进行计算,大大节省了时间;以该塔顶层的风振响应为优化目标,对TMD的参数进行了优化研究.结果表明,该塔的风振响应超过了规范的容许值,设置TMD后该塔的风振响应有明显的减小;在TMD最优参数下,该塔的风振位移响应和加速度响应的减振率分别为43.1%和29.5%;TMD对该塔的风振响应有明显的控制作用.Beijing Olympic Center Broadcast Tower is taken as an analytical case to examine windinduced vibration control with a turned mass damper （TMD） under the fluctuation loads. First, a 3- D model of the tower is simplified to a 2-D model. Secondly, according to the random vibration theory, the fluctuating wind load of this tower is simulated as time history curves using the M. Shinozuka method. Thirdly, with these curves, calculated results of the 3-D model are in agreement with the results of the 2-D model, and calculation time is greatly saved using the 2-D model. Finally, the optimal TMD coefficients are obtained regarding the wind vibration response of upper story as optimization objectives. The analysis results show that the response of the tower under fluctuation wind load is far beyond the allowable range of the code. The wind vibration responses are decreased greatly with the TMD, and, with the optimal parameters of the TMD, the displacement and acceleration wind responses of the tower are reduced respectively by 43.1% and 29.5 %. The TMD is useful for the control of wind-reduced vibration of the tower.

关 键 词：高耸结构 风荷载模拟 风振响应 TMD 振动控制 

分 类 号：TU311[建筑科学—结构工程]