苏州文博中心飘带结构TMD减振舒适度分析

Vibration comfort analysis of the ribbon-shaped structure of Suzhou Culture & Expo Center with TMD

苏州文博中心建筑造型新颖,连接两栋建筑的高低位飘带总长235m,结构体型复杂,空间跨度最大处为80m,在风荷载和人行荷载激励下,容易产生较大的振动引发舒适度问题。采用SAP2000软件对飘带结构建立三维有限元模型并进行舒适度分析;分别采用时域分析法和频域分析法计算飘带结构在不同行人密度、不同行人频率的人行荷载和全风向的风荷载作用下的振动响应,并对比分析有、无TMD减振器对加速度峰值的影响。计算分析结果表明,按提出的方法设置TMD减振器后,结构加速度显著减小,大部分工况下关键节点的减振率在20%以上,其加速度峰值满足人体舒适度要求。

Suzhou Culture & Expo Center has a novel architectural style.The total length of the high and low ribbon-shaped structure connecting the two buildings is 235m,which has complex shape and the maximum space span is 80m.Under the wind load and pedestrian load excitation,it is easy to generate large vibration and cause comfort problems.The three-dimensional finite element model of the ribbon-shaped structure was established by SAP2000 software and the comfort analysis was carried out.The time-domain analysis method and the frequency-domain analysis method were used to calculate the vibration response under pedestrian load with different pedestrian densities and different pedestrian frequencies and wind loads from all directions,and comparative analyses of the influence of TMD damper on acceleration responses were carried out.The calculation analysis results show that the structure acceleration is significantly reduced after the TMD damper is set according to the proposed method.The damping rate of most key nodes is above 20%,and the peak acceleration meets the requirements of human comfort.