深圳京基金融中心横风向风振控制试验研究

在边界层风洞试验中应用气弹模型技术对深圳京基金融中心（KFT）进行风振控制试验，通过在KFT顶层设计安装悬臂式调谐质量阻尼器(TMD)对结构横风向风振响应进行控制，研究了不同TMD参数对控制效果的影响，并将试验结果和基于刚性模型的高频压力积分(HFPI)计算结果进行比较。结果表明：使用TMD能有效抑制KFT的风致振动响应，当TMD频率接近结构1阶自振频率时，减振效果最佳，且由于结构阻尼的存在，最佳TMD频率略小于结构自振频率；TMD阻尼比为3.86%和1.67%时，结构顶层加速度响应分别减小20%和15%，而TMD阻尼比不大于0.07%时则可能对结构风致振动响应的控制不起作用。

Experimental study onreduction of cross wind vibration of the Shenzhen Kingkey Finance Tower by tuned mass damper

Wind tunnel test on mitigation of wind induced response (WIR) of the Shenzhen Kingkey Finance Tower (KFT) was conducted using aero-elastic model technique in the boundary layer wind tunnel. A cantilever device arranged in the top-level of the model of KFT was designed to evaluate the effectiveness of tuned mass damper (TMD) for suppressing cross WIR of KFT. The effect of different parameters of TMD on the mitigation of WIR was researched in the test, and the results of aero-elastic model were compared with those of the numerical calculation in which the rigid building model based high frequency pressure integration (HFPI) was applied to calculate the WIR of the building. The results show that the maximum reduction of WIR is achieved when the frequency of TMD is close to the fundamental frequency of the structure, where the optimal TMD frequency is slightly less than the frequency of the structure due to the existing structure damping. The maximum reductions of acceleration response of top story of the two TMD damping ratios of 3.83% and 1.67% are 20% and 15% respectively. However, WIR may keep unchanged when TMD damping ratio is less than or equal to 0.07%.