应用5种被动动力减振器时高层建筑侧移-扭转脉动风振反应控制优化设计的统一公式

Unified optimizing design formulas for controlling fluctuation wind-induced swaying-torsional vibration response of tall buidings by using five kinds of passive dynamic absorbers

目的是建立5种被动的动力减振器对长宽比较大的高层建筑侧移-扭转脉动风振反应控制优化设计的统一方法。文中,在建立了5种被动动力减振器对高层建筑侧移-扭转脉动风振反应控制统一的方程的基础上,导出了被动动力减振器对高层建筑侧移-扭转脉动风振反应控制效果最优等效阻尼比和被动动力减振器最优设计参数的基本公式。通过工程实例的计算与分析,本文比较了5种被动动力减振器对高层建筑侧移-扭转脉动风振反应的控制效果,讨论了动力减振器在楼层上设置位置对动力减振器最优设计参数和控制效果的影响,得到了2个有工程价值的重要结论。

This paper proposes some unified optimizing design formulas for controlling the fluctuation wind-induced swaying-torsional vibration response of the tall buildings with larger length-width ratio when using five kinds of passive dynamic absorbers. Considering the torsion effect of the tall buildings, the unified equations of the structure with five types of passive dynamic absorbers under the fluctuation wind excition is established. Then the essential computing formulas for equivalent structural damping ratio of the controlled structure and the design method of optimum parameters for passive dynamic absorbers have been derived. By the engineering ease study, control effects of five kinds of passive dynamic absorbers on the fluctuation wind-induced swaying-torsional vibration response of the tall buildings are compared, and the influence of the location of dynamic absorbers on the control effect and passive dynamic absorbers＇ optimum parameters are discussed. Finally, several important suggestions are put forward.