摘要
张靖皋长江大桥北航道桥为主跨长1208 m、主梁宽47.7 m的大跨径钢箱梁悬索桥。桥梁跨度大、主梁宽高比大,导致该桥对风的作用极为敏感。为有效提高该桥的涡振稳定性和颤振稳定性,采用1:50节段模型风洞试验,对多种气动抑振措施组合进行了研究。试验对比了不同气动措施,包括检修车轨道、导流板、上中央稳定板、水平稳定板和检修道栏杆对涡振性能的影响,同时验证了相对应的颤振稳定性,最终确定了一个可以在各风攻角下完全消除主梁涡振、并满足颤振设计要求的气动抑振组合措施。研究成果对采用整体箱梁的大跨度悬索桥的气动性能设计具有重要的参考意义。
Zhangjinggao North Channel Bridge is a long-span steel box girder suspension bridge with a main span length of 1208 m and a main beam width of 47.7 m.The large span of the bridge and the large width-to-height ratio of the main girder make the bridge extremely sensitive to wind.In order to effectively improve the vortex vibration stability and flutter stability of the bridge,a 1:50 section model wind tunnel test was used to study the combination of various aerodynamic vibration suppression measures.The test compared the effects of different aerodynamic measures including inspection vehicle rail,guide vane,upper central stabilizer,horizontal stabilizer and maintenance way railing on the vortex vibration performance,and verified its flutter stability.Finally,a combination of aerodynamic vibration suppression measures is determined,which can completely eliminate the vortex-induced vibration of the main beam at all wind attack angles and meet the flutter design requirements.The research results have important reference significance for the aerodynamic performance design of long-span suspension bridges using integral box girders.
作者
孙圣泽
周彦锋
马如进
SUN Shengze;ZHOU Yanfeng;MA Rujin
出处
《上海公路》
2023年第2期38-45,M0004,共9页
Shanghai Highways
基金
中国交通建设集团有限公司科技项目(YSZX-01-2021-01-B)
国家自然科学基金重点项目(52238005)。
关键词
大跨度悬索桥
整体式钢箱梁
节段模型试验
涡激共振
颤振
long-span suspension bridge
integral steel box girder,section model test
vortex-induced vibration
flutter
