山区标准跨径钢箱-钢板组合梁设计  

Design of Steel Box-plate Composite Beam with Standard Span in Mountainous Area

作　　者：赵艺程 孙才志 李胜[1] 范翊 许诺 ZHAO Yi-cheng;SUN Cai-zhi;LI Sheng;FAN Yi;XU Nuo(Sichuan Vocational and Technical College of Communications,Chengdu Sichuan 611130,China;Sichuan Highway Planning,Survey,Design and Research Institute Co.,Ltd.,Chengdu Sichuan 610041,China)

机构地区：[1]四川交通职业技术学院,四川成都611130 [2]四川省公路规划勘察设计研究院有限公司,四川成都610041

出　　处：《公路交通科技》2023年第7期156-163,共8页Journal of Highway and Transportation Research and Development

基　　金：四川省交通科技项目(2019-C-01)。

摘　　要：根据山区高速公路桥梁的建设环境和应用需求,通过集成利用既有桥型的优点,提出了标准跨径钢箱-钢板组合梁桥。依托四川雅康高速升航互通对25~50 m标准跨径钢箱-钢板组合梁开展设计研究,并依据主梁受力、材料用量和山区环境施工便利性,采用了双钢边箱主梁、双钢边箱中间增设工字形钢板梁的组合式主梁结构分类体系。利用有限元计算软件,以相同截面用钢量为前提,建立了钢箱梁、钢板梁和钢箱-钢板组合梁空间模型,计算分析了3种主梁结构的抗扭截面特性和抗弯截面特性。结果表明:采用双钢边箱梁中间设置钢板梁的钢箱-钢板组合梁结构方案,集成利用了钢箱梁截面优良的刚度特性和钢板梁构造简单的结构特征,具有“横向受力均衡,纵向受力优良”的受力特性,是山区小半径曲线梁桥的合理选择;钢箱-钢板组合梁采用制造、运输与安装一体化技术,能够较好满足山区道路运输条件,以制造单元纵向组拼作为安装单元的方式,可确保施工现场的快速高精度安装,实现了山区桥梁装配化施工。通过经济性对比表明:钢箱-钢板组合梁的用钢量、平均施工周期、地震内力均少于钢板梁和钢箱梁。钢箱-钢板组合梁的受力性能与钢箱梁相当,明显优于钢板梁。According to the construction environment and application requirement of highway bridge in mountainous areas,a steel box-plate composite beam bridge with standard span is proposed by integrating the advantages of existing bridge types.On the study background of upgrade interchange of Yaan-Kangding expressway in Sichuan,a study on design of a steel box-plate composite beam with standard span of 25-50 m is carried out,and based on the main beam stress,material consumption and the convenience of construction in mountainous area,a structural classification system of composite main beams,including double-steel-edge box main beam,double-steel-edge box with I-shaped(in the middle)steel plate beam,is adopted.On the premise of the same section steel consumption,the spatial models of steel box beam,steel plate beam and steel box plate composite beam are established by using the finite element calculation software,and the torsional section characteristics and bending section characteristics of the 3 main beam structures are calculated and analyzed.The result shows that(1)The structural scheme of steel box-plate composite beam that adopts double-steel-edge box beam and steel plate beam in the middle integrates the excellent stiffness characteristics of the steel box beam section and the simple structural characteristics of the steel plate beam structure,it has the stress characteristics of"balanced lateral force and excellent longitudinal force",which is a reasonable choice for small radius curved beam bridges in mountainous areas.(2)The steel box-plate composite beam adopts an integrated technology of manufacturing,transport and installation,which can meet the transport conditions of mountainous roads well,and the rapid and high-precision installation can be guaranteed at the construction site by using the longitudinal assembly of manufacturing units as the installation units,and achieve the assembly construction of mountainous bridges.Through technical and economic comparison,it shows that the steel consumption,average con

关 键 词：桥梁工程 组合梁设计 计算分析 钢箱-钢板组合梁 标准跨径 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]