摘要
以广东科学中心典型区域为研究对象,利用AR法模拟了该结构的脉动风速时程,进行不同风压、不同风向角下的风振响应分析,给出了采用非线性粘滞阻尼器的六种风振控制方案,并对不同方案的减振效果进行了对比研究。结果表明:所提减振方案对结构的风振反应具有很好的减振效果,结构顶点位移和加速度响应的最大降幅达18%和84.9%;对此类不规则大跨结构,建议将阻尼器安装在结构两侧以取得最好的减振效果;安装粘滞阻尼器对结构加速度的控制效果优于对结构侧移的控制效果。
Based on Auto-Regressive (AR) method,fluctuating wind velocity series were simulated,and the wind-induced vibration response for a typical area of Guangdong Science Center different wind pressure and in different wind directions was studied. Six kinds of wind-induced vibration control plans of adopting non-linear viscous dampers were given and the control effects of different plans were analyzed in detail. The results showed that the wind-induced vibration responses of the structure were reduced effectively by using the vibration control plans. The max vertical displacement and acceleration responses could be respectively reduced by 18% and 84.9%. For the irregular long-span structures,it was suggested that the dampers were installed on the two sides of the structure to get the maximum reducing-vibration effect. For the structure with viscous dampers,the control effect for acceleration was better than that for displacement.
出处
《振动与冲击》
EI
CSCD
北大核心
2009年第9期60-64,共5页
Journal of Vibration and Shock
基金
科技部重大基础研究前期研究专项项目(2004CCA03300)
建设部科技项目(06-K6-11)
广州市科技攻关重大项目(2004Z1-E0051)
关键词
广东科学中心
脉动风荷载
AR法
风振控制分析
粘滞阻尼器
Guangdong science center
fluctuating wind load
auto-regressive (AR) method
wind-induced vibration control analysis
viscous dampers
