大跨度桥梁箱梁的三分力系数识别研究  

COMPUTATIONIAL STUDY ON STATIC COEFFICIENTS OF BOX GIRDER SECTION FOR LONG-SPAN BRIDGES

作　　者：汪家继[1] 樊健生[1] 聂建国[1] 杨小刚 李连友 

机构地区：[1]清华大学土木工程系,北京100084 [2]中国路桥工程有限责任公司,北京100011

出　　处：《工程力学》2016年第1期95-104,共10页Engineering Mechanics

基　　金：国家自然科学基金项目(51222810;51138007)

摘　　要：该文针对高雷诺数风洞试验研究结果,分别对加拿大国家试验中心NRCC试验和昂船洲大桥试验建模计算。使用标准k-ε双方程湍流模型结合边界层网格建模,计算得到的三分力系数与试验数据吻合良好。分析了雷诺数、来流湍流强度、中央开槽宽度对桥梁断面三分力系数的影响。研究结果表明,雷诺数效应和开槽宽度对阻力系数存在影响,但对升力系数与升力矩系数影响很小,来流湍流强度对三分力系数影响均不明显。This paper reviews the results of experiments carried out within a wide range of Reynolds numbers：The National Research center of Canada（NRCC） experiments and the Stonecutters Bridge experiments. The model employs a standard k-ε turbulence model with a boundary layer. The simulation results of static coefficients fit well with the experiments. Furthermore, the influence of Reynolds number, turbulence intensity of inlet flow and the slot width of central-slotted box girder section are investigated respectively. Results show that the Reynolds number and slot width are related with drag coefficients, but exert minor influence on lift coefficients and moment coefficients. The turbulence intensity has minor effects on steady force coefficients.

关 键 词：大跨度桥梁 三分力系数 雷诺数 湍流强度 中央开槽 

分 类 号：U448.21[建筑科学—桥梁与隧道工程]