多阶梯被动变阻尼装置高层建筑风振控制性能化设计方法

Performance-based design method for wind-induced vibration control of high-rise building with multi-stage passive variable damping device

多阶梯被动变阻尼装置(multi-stage passive variable damping device,MPVDD)能够随外部激励速度变化机械式实时改变阻尼系数,同时不需要外部能量供给和反馈控制,与粘滞阻尼器相比,MPVDD耗能效果明显。在不同阶数MPVDD控制下的高层结构响应控制效果分析表明,多阶梯被动变阻尼装置出力范围大,可用于风振控制。根据风振分析结果提出了针对多阶梯被动变阻尼装置的风振控制性能水准和性能指标,以及多阶梯被动变阻尼装置高层建筑风振控制性能化设方方法,该设计方法可以对不同重现期的风荷载激励下的结构响应针对性设计,最后通过工程实例设计给出了完整的设计过程,从而证明了该方法对高层建筑风振控制的有效性和可行性。

Multi-stage passive variable damping device(MPVDD)can change the damping coefficient in real-time with the external excitation velocity change mechanically without external energy supply and feedback control.Compared with the viscous damper,the energy dissipation capacity of the variable damping device is visible.The results of structural response with different stage passive variable damping device show that MPVDD has a broad output range and can be used for wind vibration control.According to the results of wind-induced vibration analysis,the performance level and index of wind-induced vibration control for multi-step passive variable dampers are proposed,and the performance-based method of wind-induced vibration control for multi-step passive variable dampers for high-rise buildings is proposed.The design method can be used to design the structure with MPVDD under different wind loads at different recurrence periods based on the structural responses.Finally,a complete design process is given through an engineering example,which proves the effectiveness and feasibility of the method for wind-induced vibration control of high-rise buildings.