(中铁二十二局集团第一工程有限公司， 哈尔滨 150001)

［摘要］为研究波形钢腹板-桁架-混凝土板组合梁的抗风性能，建立了该类梁的CFD数值分析模型，分析了-3°，0°，3°三种风攻角以及均匀流与C类地貌两种流场条件下组合梁截面的流场、截面的风压分布以及不同位置处的平均风压系数，并给出了均匀流与C类地貌下该类梁的升力系数、阻力系数与升力矩等气动三分力系数。研究结果表明：桥面板的上表面主要表现为风吸力，下表面风压分布主要受到特征湍流即分离涡的影响；均匀流场下气动三分力系数约为C类地貌下的1.1~1.2倍；与数值分析结果相比，《公路桥梁抗风设计规范》（JTG/T 3360-01—2018）建议的气动三分力系数取值偏于保守。 

［关键词］波形钢腹板-桁架-混凝土板组合梁；气动三分力系数；数值模拟；风压分布 

中图分类号：TU398 文献标识码：A文章编号：1002-848X(2021)14-0087-07

Analysis of static three-component coefficient of corrugated steel web-truss-concrete floor composite beam 

GUO  Shubin 

(Engineering Co.,Ltd. of China Railway 22nd Bureau Group, Harbin 150001，China) 

Abstract: In order to study the wind resistance of corrugated steel webs-truss-concrete floor composite beams, a CFD numerical analysis model of this kind of beam was established. The flow field, wind pressure distribution and average wind pressure coefficient at different locations of the composite beam section under three wind attack angles of -3°, 0° and 3°, and two flow fields of uniform flow and C-class landform were analyzed. The aerodynamic three-component coefficients, including the lift coefficient, drag coefficient and lift moment of this kind of beam under uniform flow and C-class landform were given. The results show that the upper surface of the bridge deck is mainly characterized by wind suction, and the wind pressure distribution on the lower surface is mainly affected by the characteristic turbulence, namely the separation vortex. The aerodynamic three-component coefficient under uniform flow field is about 1.1~1.2 times that under C-type landform. Compared with the numerical analysis results, aerodynamic three-component coefficients recommended by Code for wind resistance design of highway bridges ( JTG/T 3360-01—2018 ) are conservative. 

Keywords:corrugated steel web-truss-concrete floor composite beam； aerodynamic three-component coefficient； numerical simulation； wind pressure distribution

作者简介：郭树彬，学士，高级工程师，Email:137277398@qq.com。