超大型冷却塔风致干扰效应试验研究  

WIND TUNNEL INVESTIGATION ON WIND-INDUCED INTERFERENCE EFFECTS FOR SUPRE LARGE COOLING TOWERS

作　　者：赵林[1] 葛耀君[1] 许林汕[1] 武占科[1] 

机构地区：[1]同济大学土木工程防灾国家重点试验室,上海200092

出　　处：《工程力学》2009年第1期149-154,159,共7页Engineering Mechanics

基　　金：科技部863计划项目(2006AA11Z108);国家自然科学基金青年基金项目(50408035)

摘　　要：设计加工了1:200缩尺比某超大型冷却塔气弹模型和刚体测压模型,对不同塔距双塔组合、四类典型工程场地单塔风振响应进行气弹模型测振风洞试验,比较了双塔塔距、来流方向角和流场条件对于冷却塔塔筒风振系数的影响;结合东南沿海某工程场地冷却塔群塔及周边建筑物组合形式,采用刚体模型测压试验和气弹模型测振试验比较了复杂场地条件多塔比例系数和风振系数,表明工程场地中与冷却塔同等尺寸其他建筑作为施扰物的重要影响。上述试验结论与我国冷却塔荷载规范进行了详细对比,指出现行规范在适用新建超大型冷却塔工程需要改进的方面。Two types of testing models, aero-elastic model and rigid pressure-measured model, were manufactured with reduced-scale ratio of 1：200 for some super large cooling towers located in the Southeast coastline. For various tower distances, incoming wind angles and field conditions, distributions of wind-vibration factors along cooling tower structures are compared by the aero-elastic model tests in TJ-3 wind tunnel. In the light of actual combination of tower groups and adjacent other buildings, the effect of complicated terrain conditions to group towers factors and wind-vibration factors are studied using the rigid model and aero-elastic model, respectively. Results show that the effect from other buildings with the same dimension as cooling towers cannot be neglected safely. The above conclusions are also compared with the corresponding items in Chinese codes, and some suggestions to improve items in cocles are finally proposed.

关 键 词：冷却塔 风洞试验 气弹模型 风振系数 群塔比例系数 干扰效应 

分 类 号：TU317.1[建筑科学—结构工程] TU271.1