曲线钢箱梁顶推施工中弯扭耦合效应影响研究  

Study on the Influence of Bending-torsion Coupling Effect in Curved Steel Box Girder Incremental Launching Construction

作　　者：王纪源 万刚 陈甫君 于建华 张谢东[2] WANG Jiyuan;WAN Gang;CHEN Fujun;YU Jianhua;ZHANG Xiedong(Jiangsu Provincial Transportation Engineering Group Co.,Ltd.,Zhenjiang 212100,China;School of Transportation and Logistics Engineering,Wuhan University of Technology,Wuhan 430063,China;Sichuan Transportation Construction Group Co.,Ltd.,Chengdu 610041,China)

机构地区：[1]江苏省交通工程集团有限公司,镇江212100 [2]武汉理工大学交通与物流工程学院,武汉630063 [3]四川省交通建设集团有限公司,成都610041

出　　处：《交通科技》2024年第6期82-87,共6页Transportation Science & Technology

摘　　要：在曲线钢箱梁顶推施工过程中,弯扭耦合作用对结构力学特性具有明显影响。文中以某曲线连续钢箱梁桥顶推施工项目为背景,采用有限元软件建立其顶推施工分析模型,对曲线钢箱梁顶推过程中弯扭耦合效应进行计算,并与相关实际测量数据对比分析。结果表明,弯扭耦合对应力、内力的影响比结构变形更明显;桥墩支反力的影响系数最高超过0.8,同一工况下最前端桥墩支反力受到的弯扭耦合作用影响最大;其他因素会增强低应力区域的弯扭耦合作用,而对高应力区域影响较小。The effect of bending and torsion coupling during the incremental launching construction of curved steel box girders has a significant influence on the mechanical properties of the structure.Taking the incremental launching construction project of a curved continuous steel box girder bridge as the background,the finite element software was used to establish the incremental launching construction analysis model,and calculate the bending torsion coupling effect during incremental launching construction process of the curved steel box girder.In addition,the results were compared and analyzed with relevant measured data.The results show that the influence of bending-torsion coupling on stress and internal force is more obvious than that on structural deformation.The influence coefficient of pedestal bearing reaction force is more than 0.8 at the highest,and under the same conditions,the influence of bending-torsion coupling on the front pedestal bearing reaction force is the largest.Moreover,other factors will enhance the bending-torsion coupling in the low-stress area,while the influence on the high-stress area is small.

关 键 词：曲线钢箱梁 顶推施工 弯扭耦合 力学特性 

分 类 号：U441[建筑科学—桥梁与隧道工程]