某超高层结构三种风振控制方法的对比研究  

Comparison research of three control plans for wind-induced vibration on a super high-rise building

作　　者：周云[1] 汪大洋[1] 邓雪松[1] 陈麟[1] 

机构地区：[1]广州大学土木工程学院,广州510006

出　　处：《振动与冲击》2009年第2期16-21,共6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);广州市科技攻关重大项目(2004Z1-E0051);建设部科技项目(06-K6-11);广州市属高校科技计划项目(2046)

摘　　要：以某超高层结构的风振控制为研究对象,阐述了风荷载的动力特性,利用改进的自回归模型模拟了X和Y两个方向的脉动风荷载时程,针对该工程的自身特点提出了设置粘滞阻尼器和调频质量阻尼器(Ⅱ)、设置粘滞阻尼器(Ⅲ)、设置调频质量阻尼器(Ⅳ)的三种减振控制方案。在10年、50年和100年一遇三种风振作用下,对该工程进行了不同风振方向和不同控制方案下的风振控制动力分析。对比分析了不同方案下的控制效果,结果表明控制方案Ⅱ、Ⅲ具有大量耗散风振输入能量、有效衰减结构动力响应、降低风振作用下结构层加速度和层间侧移沿高度方向突变的能力,可减小结构顶层位移和加速度响应的最大幅度分别为33%和51.4%,证明了所提控制方案对于抑制结构风致振动、提高结构安全和舒适使用性能的可行性和有效性。最后依据分析结果对超高层结构体系风振控制的分析与设计提出了建议。Wind-induced vibration control of a super high-rise building was selected as an example in the paper.The dynamic characteristic of wind was introduced.Fluctuating wind-speed time series in both X-direction and Y-direction were simulated by improved AR model.According to natural characteristics of the building,three kinds of damping control plans of added viscous dampers and tuned mass damper(Ⅱ),added viscous dampers(Ⅲ),and added tuned mass damper(Ⅳ) were put forward.Dynamic analysis of wind-induced vibration control for the building in different wind directions and with different control plans was carried out under the condition of wind strength encountered once for 10 years,50 years and 100 years.The control effects of different plans were analyzed in detail.The results show that the control plans of II and III can dissipate energy imported by wind,attenuate dynamic response,reduce mutation of story-acceleration response and inter-story displacement effectively.The maximum roof displacement and acceleration response can be respectively reduced by 33% and 51.4%.So,the control plans are feasible and effective to control wind-induced vibration,improve safety and comfort of structure.Some suggestions for wind-induced vibration control of high-rise buildings were put forward.

关 键 词：超高层结构 风振控制 AR模型 粘滞阻尼器 调谐质量阻尼器 

分 类 号：TU973.2[建筑科学—结构工程] TU352.2