单重和多重调谐质量惯容阻尼器控制连体超高层建筑风振响应比较研究

Comparison of mitigation effects on wind-induced response of connected super-high-rise buildings controlled by TMDI and MTMDI

连体超高层建筑因存在强烈的气动干扰,在强风下可能会出现大幅相对振动,调谐质量惯容阻尼器(TMDI)是一种振动控制装置,其惯容器两端的相对加速度较大时,TMDI振动控制效果较好。结合两者各自的特点提出了多重调谐质量惯容阻尼器(MTMDI)控制连体超高层建筑的风振响应,两个TMDI分别控制两栋建筑各自的一阶自振频率。首先建立了MTMDI控制连体超高层建筑风致响应数学模型,然后开展了某连体超高层建筑的刚性模型同步测压风洞试验;最后,基于该数学模型和测压风洞试验结果分析了该连体建筑在分别安装两个和单个TMDI对风振加速度和位移响应的减振效果。研究结果表明:虽然两个TMDI的总质量和总惯容量比单个TMDI相应的参数小,但两者的减振效果基本相同,两者都能有效地减小两栋建筑在各个风向角下的加速度响应,如在270°风向角下,安装TMDI后两栋建筑顶层加速度响应分别减小了37.5%和50.0%;对于位移响应,两者都可以减小高栋建筑的响应,其对低栋建筑在少部分风向角下的减振效果并不理想。

Due to effects of strong aerodynamic interference under strong winds, large relative motion may occur in adjacent connected super-high-rise buildings. Tuned mass damper inerter(TMDI) is a novel vibration control device, which performs well when the relative acceleration is large at both ends of the inerter. In this paper, multi-tuned mass damper inerter(MTMDI) was proposed to control the wind-induced responses of adjacent connected super-high-rise buildings. Two TMDIs control the first-order natural frequencies of the two buildings separately. Firstly, the mathematical model of wind-induced responses of connected super high-rise buildings with MTMDI was established, then the wind tunnel test for synchronous pressure measurement of a connected super high-rise building rigid model was carried out. Finally, based on the mathematical model and the wind tunnel test results, the wind-induced acceleration and displacement response of the connected buildings with two TMDIs and with one TMDI were compared. The results show that in spite the total mass and inertia using two TMDIs are smaller than the corresponding parameters using single TMDI, the vibration reduction effect using two TMDIs is almost the same as using single TMDI. Both TMDIs can effectively reduce the acceleration response of two buildings under different wind directions. For example, on the top floor of two buildings with TMDIs installed, the acceleration responses at 270° wind directions are reduced by 37.5% and 50.0%, respectively. For displacement response, both TMDIs can effectively reduce the responses of the higher building. However, the vibration reduction effect of the other building is not significant under a few wind directions.