大间距下高耸双烟囱风致特性试验研究  

Experimental Study on Wind-Induced Characteristics of Tall Double Chimneys with Large Spacing

作　　者：雷伟 王骑[1,2] 李明水[1,2] 李志国[1,2] LEI Wei;WANG Qi;LI Mingshui;LI Zhiguo(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;Wind Engineering Key Laboratory of Sichuan Province,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]西南交通大学风工程四川省重点实验室,四川成都610031

出　　处：《西南交通大学学报》2024年第1期104-112,共9页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金(51678508)。

摘　　要：双烟囱结构在自然风作用下存在气动干扰效应,从而诱发较大风致振动,威胁结构安全.合理计算和预测风振响应是双烟囱抗风设计的关键.以某中心距为8倍平均直径的双烟囱结构为研究对象,开展刚性模型测力和气弹模型测振风洞试验,将试验结果与中国规范、欧洲规范和CICIND(International Committee on Industrial Construction)规范计算值进行比较,详细研究双烟囱在不同风向角下的风致响应特性.研究结果表明:在烟囱串列布置下,迎风侧烟囱具有遮挡和干扰效应,一方面使得背风侧烟囱底部弯矩减小,另一方面使其横风向位移大于在其他风向角下的值;由于厂房的干扰效应,风振系数中国规范计算值与试验值接近;当烟囱高度超过厂房高度后,计算值较试验值偏大;对于横向响应,中国规范计算值较试验值大37.1%,欧洲规范计算值与试验值接近,仅偏小6.9%,CICIND规范计算值比试验值小17.1%.Double-chimney structure has aerodynamic interference effects under natural wind,which will induce large wind-induced vibrations,further threatening the safety of the structure.Reasonable calculation and prediction of wind-induced vibration responses are essential for wind resistance design of double-chimney structures.A double-chimney structure with a center distance equal to eight times its average diameter was experimentally tested.The wind tunnel tests of force measurement with a rigid model and vibration measurement with an elastic model were carried out.The test results were compared with the calculated values of the Chinese code,European code,and International Committee on Industrial Construction(CICIND)code to explore the wind-induced response characteristics of the double chimneys under different wind angles.The results demonstrate that in tandem arrangement,the chimney on the windward side shows the shielding and interference effects.Therefore,the bending moment at the bottom of the chimney on the leeward side is reduced,and the across-wind displacement is greater than that at other wind angles.The calculated values of wind-induced vibration coefficients are close to the test values due to the interference effects of the power station.When the height of the chimney exceeds the station,the calculated values are greater than the test values.In terms of the across-wind responses,the values calculated by the Chinese code are 37.1%larger than the test values.The values calculated by the European code are close to and only 6.9%smaller than the test values,but the values calculated by the CICIND code are 17.1%smaller than the test values.

关 键 词：双烟囱 风洞试验 设计规范 风振系数 横风向位移 

分 类 号：TU279.742[建筑科学—建筑设计及理论]