某千米级摩天大楼的风振控制研究

Wind-induced vibration control for a kilometer skyscraper

以中国建筑总公司提出的拟建千米级摩天大楼为研究对象,运用有限元软件ANSYS进行了风振分析,计算结果表明风向角330°为结构位移响应的最不利风向,0°为结构扭转角位移以及舒适度响应的最不利风向。从数值上看,结构的层间位移角以及位移比极值超过了规范要求,为此采用了质量阻尼器和黏滞阻尼器对结构进行风振控制研究。针对两种控制方法,分别设计了相应的控制方案,考察了包括阻尼器参数,个数以及布置形式等相关因素对于控制效果的影响。据此给出对千米级结构风振控制的建议,为以后类似结构的风振控制设计提供参考。

Here, a kilometer skyscraper proposed to be constructed by China National Building Corporation was taken as the study object. Firstly, its wind-induced vibration analysis was performed using the finite element(FE) software ANSYS. The results showed that the wind direction angle 330°is the most unfavorable wind direction to its structural displacement response;the wind direction angle 0°is the most unfavorable wind direction to its structural torsional angle displacement and comfort response;its inter-story drift angle and displacement ratio extreme value exceed requirements in the design standard. So, mass damper and viscous one were used by the authors to control the skyscraper’s wind-induced vibration. The different control schemes were designed for the 2 control devices considering effects of factors including damper’s parameters, number and arrangement. Finally, some wind-induced vibration control suggestions were proposed for the kilometer skyscraper to provide a reference for further wind-induced vibration control design of similar structures.