风速对空冷支架结构体系风振系数影响的试验研究  

EXPERIMENTAL STUDY OF THE INFLUENCE OF WIND SPEED ON WIND VIBRATION COEFFICIENT OF AIR COOLED CONDENSER STRUCTURE SYSTEM

作　　者：赵更歧[1] 陈星星[1] 李明[1] 郭俊平[1] 

机构地区：[1]郑州大学土木工程学院,郑州450000

出　　处：《工业建筑》2017年第3期98-101,共4页Industrial Construction

摘　　要：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。An air cooled condenser structure with unique properties,80% of the mass focuses on the upside of the structure,so its vibration shows the first third-orders occurs to vibration coupling,hence the current specification for wind load calculation of this unique air cooled condenser structure system form is not applicable. Combined with a certain air cooled condenser structure an aeroelastic model was made,through the wind tunnel test analysis it was concluded that the wind vibration coefficient β of the structure decreased with the increase of wind speed. To ensure the security of this kind of structure,it was pointed out that the average of 1. 80 of wind vibration coefficient of measuring point at structure windward side should be used to do wind load calculation.

关 键 词：风速 风振系数 风洞试验 空冷支架结构 

分 类 号：TU352.2[建筑科学—结构工程]