复杂多塔结构风致响应研究

Wind-induced responses of multi-tower structure

基于刚性模型风洞测压试验的结果,对一个多塔结构进行风致响应研究,采用平稳激励下随机振动的模态叠加法(CQC法)进行计算。分析了结构的风致响应,计算结果表明:多塔结构各个塔顶之间的风致响应随风向具有类似的变化规律,最大总位移及加速度出现时风向基本相同;前两阶侧向弯曲振型和第三阶扭转振型对应的共振分量贡献了动力响应的主要能量。

Wind-induced responses of a multi-tower structure are computed based on wind pressures acting on the tower obtained from wind tunnel tests on the rigid model and the CQC method is adopted. The wind-induced responses of the structure are analyzed, and the characteristics of the wind-induced responses for different wind directions are investigated. The study shows that the characteristics of wind-induced responses of each tower in the multi-tower structure are similar and the maximum of total peak response of each tower （including the displacement and acceleration） occurs when wind moves in the same direction. And it is the resonant component of the lower-order modes （around up to 3） that contributes the most of energy of the dynamic responses.