双幅桥静分力系数气动干扰效应研究  

On Effects of Aerodynamic Interference on Aerodynamic Coefficients of Twin-deck Bridges

作　　者：郭春平[1] 白桦[1] 洪光[1] 

机构地区：[1]长安大学公路学院,陕西西安710064

出　　处：《重庆交通大学学报（自然科学版）》2011年第5期899-902,942,共5页Journal of Chongqing Jiaotong University(Natural Science)

摘　　要：采用计算流体动力学(CFD)的方法,利用Flunet软件对某双幅桥面桥梁三分力系数的气动干扰效应进行数值模拟。结果表明:由于前桥对后桥的遮挡作用,后桥的静力三分力系数受到较大影响,阻力系数与单桥相比减小了74%,升力系数减小了88%;随着前后桥间距的增大,双幅桥梁之间的气动干扰效应逐渐减小,但双幅桥面达到8b(b为梁高与双幅桥间距的比值)间距时仍存在一定的气动干扰现象,不可忽视。Aerodynamic interference effects between the windward and the leeward deck of twin-deck were simulated by computational fluid dynamics（CFD） method through Fluent.Results indicate that due to the shelter effect,static component coefficient of rear axle was greatly influenced;resistance coefficient reduced by 74% compared with single bridge;lift coefficient decreased by 88%.The aerodynamic interference effect decreased gradually with rear axle space increasing;when space reached 8b（b was the ratio of beam height and double deck bridge space）,there remained certain aerodynamic interference phenomenon,which could not be ignored.

关 键 词：双幅桥面 三分力系数 气动干扰 数值模拟 

分 类 号：U446.1[建筑科学—桥梁与隧道工程]