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空气冷凝器支架结构体性质独特,80%的质量集中在支架结构上部,振动表现为前三阶振动耦合,现行GB 50009—2012《建筑结构荷载规范》关于风荷载的计算对空冷支架体系这种独特的结构形式已不适用。结合某空冷支架结构制作气弹模型,通过风洞试验分析得出:结构的顺风向风振系数β随着风速的增大而减小。为确保此类结构的安全,提出取结构迎风面测点风振系数的平均值1.80进行风荷载计算。
Air condenser stent structure of a unique nature, 80% of the mass concentrated in the upper part of the stent structure, the vibration showed the first three vibration coupling, the current GB 50009-2012 “Building Structure Load Specification” on the wind load on the air-cooled stent system this Unique structure is no longer applicable. Aeroelastic model was made by combining with an air-cooled support structure. The wind tunnel test results show that the windward coefficient β decreases with the increase of wind speed. In order to ensure the safety of such structures, it is proposed to take the average value of the wind-induced vibration coefficient of the windward surface measuring point of the structure as 1.80 for the wind load calculation.