三塔干扰下冷却塔的风荷载和风致响应分析  

Analysis of wind load and wind-induced response of three large hyperbolic cooling towers

作　　者：鲍侃袁[1] 

机构地区：[1]浙江大学建筑设计研究院,杭州310028

出　　处：《建筑结构》2013年第15期91-96,共6页Building Structure

摘　　要：根据某拟建的大型双曲冷却塔实际尺寸按照1∶300的比例制作了刚性模型,在其外表面沿高度由上至下布置5道环向测层,每层36个测点,将其放在边界层风洞中进行三塔干扰试验。测试结果表明,在三塔受风荷载作用时,前塔的阻挡作用明显,后塔的时均风力显著减小,但脉动风压却明显增大,使得极值干扰系数增大。同时得到了极值干扰系数最大时的响应干扰系数,给出了考虑三塔干扰的工程设计的干扰系数建议值。The wind-tunnel experiments of rigid model of large hyperbolic cooling towers based on 1 ： 300 scale was carried out. The five test hoops were disposed from top to bottom, each hoop has 36 test points along the circle. The results show that the wind-pressure of the tower in the rear is seriously influenced by its front tower, the average part of wind-pressure on rear tower is relatively smaller, but the fluctuation part is relatively larger compared to the situation of isolated tower, so the maximum of wind-pressure which is the sum of average part and fluctuation part is relatively larger. The coefficients of wind-pressure and structural response of rear tower under influence of front towers is proposed for structural design.

关 键 词：大型双曲冷却塔 风荷载 三塔干扰 风致响应 干扰系数 

分 类 号：TU312.1[建筑科学—结构工程]