考虑两桥空间相交的桥面风环境数值模拟及行车安全分析  

Numerical Simulation of Wind Environment and Analysis of Driving Safety on the Deck of Two Spatially Intersecting Bridges

作　　者：赵文强 刘曙光 闵齐胜 涂熙 ZHAO Wen-qiang;LIU Shu-guang;MIN Qi-sheng;TU Xi(CCCC Highway Consultants Co.Ltd.,Beijing 100010,China;School of Civil Engineering,Chongqing University,Chongqing 400045,China)

机构地区：[1]中交公路规划设计院有限公司,北京市100010 [2]重庆大学土木工程学院,重庆市400045

出　　处：《公路》2024年第10期127-133,共7页Highway

摘　　要：多座桥梁空间相交可能产生复杂的桥面风环境,对桥面行车安全造成不利影响。以某空间相交桥梁案例为背景,采用CFD数值模拟方法,研究两桥空间相交对桥面风环境及桥面行车安全性的影响。研究中对比分析流场中车辆所受横风荷载和倾覆临界力,判断桥面行车安全性;分别考虑不采用风障和采用不同形式的风障条件下桥面风环境的区别,对比分析风障对桥面风环境的改善作用。结果表明,两桥相交处桥面局部风速降低,行车安全性提高;桥面风速随风障条数增加而降低,横风作用下的行车安全性提高。The spatial intersection of multiple bridges can create a complex wind environment on the deck,potentially affecting the safety of vehicles driving on it.A specific case of spatially intersecting bridges is taken as the background,the numerical simulation methods are adopted to investigate the impact of the spatial intersection of two bridges on the wind environment and driving safety on the deck.By comparing and analyzing the crosswind loads and overturning critical forces experienced by vehicles in the flow field,the safety of driving on the deck can be assessed.The differences in the wind environment on the deck without wind barriers and with different types of wind barriers are taken into account,the improvement effect of wind barriers on the wind environment on the deck are compared and analyzed.The analysis shows that when the local wind speed on the deck at the intersection of two bridges decreases,the driving safety is improved.Additionally,as the number of wind barrier strips increases,the wind speed on the deck decreases,further enhancing driving safety under crosswind conditions.

关 键 词：桥梁工程 桥面风环境 行车安全性 风障效果评价 风洞试验 

分 类 号：U442.59[建筑科学—桥梁与隧道工程]