中外公路2026，Vol.46Issue(1)：122-129,8.DOI:10.14048/j.issn.1671-2579.2026.01.013
检修轨道对分体式钢箱梁涡激振动影响机理研究
Influence Mechanism of Maintenance Rails on Vortex-Induced Vibration of Twin Steel Box Girders
摘要
Abstract
Maintenance rails are an important passage for the safe operation and maintenance of bridges,significantly affecting the vortex-induced vibration(VIV)performance of main girders.A twin steel box girder cable-stayed bridge with the main span of 658 m was taken as the engineering background to investigate the influence mechanism of maintenance rails on the VIV performance of twin steel box girders.Combined with section model wind tunnel tests and two-dimensional fluid-structure interaction CFD numerical simulations,the vertical VIV performance of the main girder sections with and without maintenance rails was studied,and the mechanism of maintenance rails'influence on VIV performance was analyzed.The results show that large vertical VIV occurs in main girder sections with maintenance rails,while the vertical VIV amplitude of the sections without maintenance rails decreases by more than 40%,indicating that maintenance rails significantly influence the VIV performance of the twin steel box girders.Periodic vortex shedding occurs on the upper and lower surfaces of main girder sections with maintenance rails,which results in a large pressure difference between the upper and lower surfaces of main girders,thus generating periodic vortex-induced force and causing large-amplitude vertical VIV of main girders.After removing the maintenance rails,the periodic vortex shedding pattern on the upper and lower surfaces of main girder sections with maintenance rails is disrupted,thereby suppressing the VIV amplitude of main girders.关键词
斜拉桥/分体式钢箱梁/涡激振动/风洞试验/CFD数值模拟/检修轨道Key words
cable-stayed bridge/twin steel box girder/vortex-induced vibration/wind tunnel test/CFD numerical simulation/maintenance rail分类
交通工程引用本文复制引用
孙洪鑫,胡磊,陈魏,黄文俊..检修轨道对分体式钢箱梁涡激振动影响机理研究[J].中外公路,2026,46(1):122-129,8.基金项目
国家自然科学基金资助项目(编号:52078210) （编号:52078210）
湖南省杰出青年科学基金资助项目(编号:2021JJ10003) （编号:2021JJ10003）
湖南省教育厅优秀青年基金资助项目(编号:23B0494) （编号:23B0494）
