高层钢结构TMDs风振舒适度控制最优参数与简化设计

分别将脉动风视为白噪声和采用Davenport风速谱，基于建筑荷载规范GBJ9－87，导出了高层钢结构－TMD系统减振系数DRF1和DRF2。数值研究表明；高层钢结构的基本周期和基本风压不影响TMDs最优设计参数；将脉动风设为白噪声或采用Davenport风速谱时，TMDs最优设计参数未有改变，但减振系数略有变化。同时，基于导出的高层钢结构TMD－系列加速度传递函数及加速度动力放大系数，研究了TMDs最优参数取值。提出了高层钢结构TMD风振舒适度控制简化设计过程。数值算例说明了本文方法的应用及TMDs对高层钢结构风振舒适度控制的有效性。比较了基于位移和加速度设计的TMDs系统。

Optimum Parameters and Simplified Design for wind-Induced Vibration Comfort Control on Tall Steel Structure with TMDs System

Regarding fluctuating wind as white noise excitation and using Davenport wind speed spectrum respectively,based on the building load code (GBJ9-87),the dynamic reduction factors (DRF 1 and DRF 2) for the tall steel structure_TMD system have been formulated.The numerical investigation shows that the fundamental period of tall steel structure and the basic wind pressure have no influence on the TMDs optimum design parameters.Assuming fluctuating wind to be white noise excitation and adopting Davenport wind speed spectrum have no effect on the TMDs optimum parameters,except little change of the dynamic reduction factors.The simplified design procedure for TMDs wind_induced vibration comfort control on tall steel structure is proposed.A numerical example demonstrates the application of the proposed method and the effectiveness of TMDs in controlling the wind_induced vibration comfort of tall steel structure.Also,on the basis of the acceleration transfer function and acceleration dynamic magnification factor for the tall steel structure_TMD system,optimum parameters for TMDs are studied.A comparison between TMDs system parameters based on the displacement reduction factor and that based on the acceleration trandfer function is made.