贵黄高速阳宝山大桥超宽钢桁梁设计  

Design of Very Wide Steel Truss Girder of Yangbaoshan Bridge on Guiyang-Huangping Expressway

作　　者：李永庆[1] 樊冰冰 冯云成[1] 翟晓亮[1] 秦凤江[2] LI Yong-qing;FAN Bing-bing;FENG Yun-cheng;ZHAI Xiao-liang;QIN Feng-jiang(CCCC First Highway Consultants Co. , Ltd. , Xi′an 710075, China;School of Civil Engineering, Chongqing University, Chongqing 400045, China)

机构地区：[1]中交第一公路勘察设计研究院有限公司,陕西西安710075 [2]重庆大学土木工程学院,重庆400045

出　　处：《世界桥梁》2021年第6期1-7,共7页World Bridges

基　　金：贵州省交通运输厅2020年度科技项目(2020-122-032);中国交建重大研发项目(2019-ZJKJ-12)。

摘　　要：贵黄高速阳宝山大桥主桥为单跨650 m钢桁梁悬索桥,桥面全宽36.6 m。通过对比分析山区建设条件下悬索桥不同梁型的优、缺点,加劲梁采用板桁结合钢桁梁,主桁中心桁高5.5 m,中心桁宽36 m,全桥共分为57个吊装节段;钢桁梁纵断面线形采用景观效果好、便于杆件制造的对称凸形圆曲线;根据剪力分布规律,主横桁腹杆采用对称W形布置;钢桥面板对接焊缝及下方纵梁均设置在轮迹横向分布频率最低的位置;销接式吊索锚板选择传力明确、便于焊接的外置式连接形式;结合该桥风洞试验研究结果,全桥布置3道永久下稳定板,跨中130 m范围布置临时上中央稳定板,以解决施工和成桥阶段加劲梁的颤振稳定性问题。The main bridge of Yangbaoshan Bridge is a steel truss girder suspension bridge with a single span of 650 m.The full width of the deck reaches 36.6 m.The benefits and disadvantages of different types of stiffening girders for the suspension bridge in the mountainous region were compared and analyzed,and the combined use of steel trusses and orthotropic steel plates was considered a feasible solution.The stiffening girder consists of 57 truss segments,with the trusses in the center measuring 5.5 m high and 36 m wide.To realize better aesthetic effect,the steel truss is treated with symmetrical protruding circular curves that can facilitate the manufacture of truss members as well.The web members form the shape resembling the letter“W”,which is regarded beneficial to the shear force distribution.The pinned anchor plates of hanger cables are a type of external connection that creates clear load transfer path and eases the welding work.According to the wind tunnel test,three permanent lower stabilizer plates and temporary upper central stabilizer plate(within the 130 m midspan range)are added to address the flutter stability issue of the stiffening girder in the construction process and after completion.

关 键 词：山区桥梁 悬索桥 板桁结合钢桁梁 纵断面线形 对接焊缝 销接式吊索锚板 气动措施 结构设计 

分 类 号：U448.25[建筑科学—桥梁与隧道工程] U442.5[交通运输工程—道路与铁道工程]