山区大跨径悬索桥风场特性CFD数值模拟研究  

CFD Numerical Simulation of Wind Field Characteristics of Long-span Suspension Bridge in Mountain Area

作　　者：周莉 唐志[2] ZHOU Li;TANG Zhi(Guizhou Provincial Highway Bureau,Guiyang 550001,China;Guizhou Transportation Planning Survey&Design Academe Co.,Ltd.,Guiyang 550081,China)

机构地区：[1]贵州省公路局,贵阳550081 [2]贵州省交通规划勘察设计研究院股份有限公司,贵阳550081

出　　处：《交通科技》2023年第3期39-42,49,共5页Transportation Science & Technology

摘　　要：为研究山区大跨径钢桁梁悬索桥的桥位地形风场特性,确定基准风速,以开州湖特大桥为依托,采用CFD数值模拟,通过8种工况的计算分析,研究大桥桥址区的风参数,得出桥址区的风场特性分布。结果表明,不同工况下,主梁高度处的各向风速及风攻角有较大差异;CFD数值模拟得到的主梁基准风速较依据规范确定的基准风速小;综合考虑桥址区的风场特性,本桥桥面处的基准风速为38.5 m/s。The study of wind field characteristics of long-span steel truss suspension bridge in mountainous area can provide the basis for determining the reference wind speed.Based on the Kaizhou Lake Bridge,the wind parameters of the bridge site area were studied by using CFD numerical simulation,and the wind field characteristics of the bridge site area were obtained through calculation and analysis of 8 operating conditions.The results show that the wind velocity and attack angle at the height of the girder vary greatly under different conditions,and the reference wind velocity of the girder obtained by CFD numerical simulation is smaller than that determined by the code.Considering the wind field characteristics of the bridge site,the reference wind speed at the bridge deck is taken as 38.5 m/s.

关 键 词：钢桁梁悬索桥 CFD数值模拟 风场特性 风剖面 基准风速 

分 类 号：U442.53[建筑科学—桥梁与隧道工程] U441.2[交通运输工程—道路与铁道工程]