加入粘弹性阻尼器的高楼桅杆风振响应分析

高楼顶部设桅杆是一种常见的结构形式以满足建筑功能的要求。为分析在风荷载激励下桅杆对主体结构的影响,以及高耗能粘弹性阻尼器对桅杆和主体结构的振动控制效果,根据Davenport风速谱理论,采用AR线性滤波法模拟出空间、时间相关的脉动风速时程,并采用ETABS有限元软件进行风荷载激励下的时程分析。结果表明,高耗能粘弹性阻尼器的加入使主体结构的桅杆放置层桅杆周围部分杆件的内力有了较大幅度的减小,桅杆的动力响应得到了有效控制。

Wind Vibration Response Analysis of High Building Masts with Viscoelastic Dampers

It＇s a common form of structures to set up a mast on the top of a building to meet the architectural func-tional requirements.In order to analyze the influence of the mast on main structures,and the vibration control ef-fect of high energy viscoelastic dampers on mast and main structures,a time history simulation of space-relatedand time-related fluctuating wind was conducted by using the AR linear filtering method according to the Daven-port wind spectrum theory.In addition,elastic time history analysis was also performed via ETABS finite elementsoftware subjected to wind load excitation.The results indicate that the high-energy-dissipation viscoelastic damp-ers added to the structure greatly reduce the inner force of the bars around the mast on the layer where the mastplaces on,and the dynamic response of the mast is effectively controlled.