紧邻高陡山体桥址区风特性数值模拟研究  

Numerical simulation of wind characteristics above bridge site adjacent a high-steep mountain

作　　者：李永乐[1] 胡朋[1] 蔡宪棠[1,2] 熊文斌[1,3] 廖海黎[1] 

机构地区：[1]西南交通大学桥梁工程系,成都610031 [2]广州市市政工程设计研究院,广州510060 [3]四川宜泸高速公路开发有限责任公司,四川宜宾644000

出　　处：《空气动力学学报》2011年第6期770-776,共7页Acta Aerodynamica Sinica

基　　金：国家自然科学基金(90915006);教育部新世纪优秀人才支持计划(NCET-06-0802);四川省杰出青年学科带头人计划(2009-15-406);中央高校基本科研业务费专项资金(2010XS02;SWJTU11CX008;SWJTU11CX127)

摘　　要：以紧邻高陡山体的大跨度悬索桥为工程背景,应用CFD商业软件FLUENT对桥址区复杂地形地貌进行了区域地形风场数值模拟研究,通过多工况的对比分析,探讨了不同来流情况下高陡山体对主梁平均风速、风攻角以及风剖面的影响,讨论了桥址区的峡谷风效应。研究结果表明,随来流方向的不同,主梁平均风速、风攻角及风剖面形状在高陡山体附近变化的规律以及受高陡山体影响的范围不同,桥址处未形成明显的峡谷风效应。研究结论为该桥的进一步抗风设计提供依据。A long-span suspension bridge adjacent a high-steep mountain is regarded as a typical example paper. Numerical simulation for the wind field distribution of the bridge site with complex terrain is carried out by employing CFD commercial software FLUENT. According to comparative analysis of many different cases, influence of high-steep mountain on the average wind velocities, wind attack angles and wind profiles along the bridge deek under different flow directions are analyzed, effect of gorge wind at bridge site is discussed. It is shown that the change laws of average wind velocities, wind attack angles and wind profiles along the bridge deck nearby the high-steep mountain vary with the flow directions, also the range of influence by the high-steep mountain; furthermore, the bridge site has no notable effect of gorge wind. The researeh conclusions provide the foundation for the further wind-resistant design.

关 键 词：大跨度桥梁 高陡山体 桥址区 风特性 CFD 

分 类 号：U442.4[建筑科学—桥梁与隧道工程]