为抑制高层建筑结构的风致振动响应,提出一种基于被动吸吹气的流动控制方法,将方形截面高层建筑结构与被动吸吹气套环进行结合,在结构立面预设吸吹气通道,通过结构尾流吹气破坏非定常旋涡脱落,从而减小作用于结构表面的平均风荷载和脉动风荷载,达到抑制风致振动的目的。在风洞试验中研究被动吸吹气套环安装在模型3个不同高度时,试验模型整体风荷载、风致振动响应以及尾部流场的变化规律。试验结果表明,被动吸吹气套环控制装置能有效抑制高层建筑结构的整体风荷载及风致振动响应,且套环安装位置越接近结构顶部,对结构风致振动的控制效果越显著。
Abstract
In order to suppress wind-induced vibration response of a high-rise building structure, a flow control method based on passive suction and blowing was proposed.The square cross-section high-rise building structure was combined with passive suction and blowing rings.A suction and blowing channel was set on the facade of the structure, and the unsteady vortex shedding was destroyed by the structure wake blowing to reduce average wind load and fluctuating wind load acting on the structure surface, and suppress wind-induced vibration.In wind tunnel tests, variation laws of wind load, wind-induced vibration response and tail flow field of the test model were studied when passive suction and blowing rings were installed at 3 different heights of the model.The test results showed that the passive suction and blowing ring control device can effectively suppress the overall wind load and wind-induced vibration response of the high-rise building structure; the closer to the structure top the ring installed position, the more significant the wind-induced vibration control effect.
关键词
高层建筑 /
风致振动 /
风荷载 /
风洞试验 /
绕流场
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Key words
high-rise building /
wind-induced vibration /
wind loads /
wind tunnel test /
flow field
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