磁流变阻尼器对高层建筑风振舒适度的半主动控制分析

Analysis of semi-active control for comfort of tall building due to wind-induced vibration by using MR damper

高层建筑风振舒适度的控制是结构抗风设计的一项重要内容。本文提出了磁流变阻尼器对高层建筑风振舒适度控制的一种设计方法。由于加速度是舒适度的判别标准 ,因此 ,首先通过对依据现行规范计算和用计算机模拟两种方法下得到的加速度进行比较 ,进而对模拟的脉动风荷载进行合理的修正 ,并以此作为抗风设计的依据 ;其次 ,根据磁流变阻尼器在不同位置时的控制效果 ,合理地布置控制装置 ,在此基础上 ,通过对加速度的有效控制来满足结构舒适度要求 ;最后 ,对磁流变阻尼器的参数进行合理的设计 ,达到优化的目的。

Controlling the comfort of tall building due to wind induced vibration is important for structure design. In this paper, based on MR(magneto rheological)damper, a comfor table design method is presented. As know to all, the criterion of the comfort is structural acceleration. First of all, by comparing the acceleration results of building code and the simulation of computer, the fluctuating wind is modulated to be design wind load. Then, the optimal location of MR damper in structure is chosen based on the control effect. And then, the requirement of comfort is met by effectively controlling the acceleration through the optimal distribution of MR damper. Finally, the reasonable parameters of MR damper are confirmed.