港珠澳大桥大悬臂连续钢箱梁变形分析方法  

Analysis Method for Deformation of Long Cantilever Continuous Steel Box Girder of Hong Kong-Zhuhai-Macao Bridge

作　　者：景强 

机构地区：[1]港珠澳大桥管理局,广东珠海519015

出　　处：《桥梁建设》2015年第2期1-5,共5页Bridge Construction

摘　　要：为对钢箱梁大节段吊装过程中的结构变形进行精度可靠且效率高的计算,以港珠澳大桥深水区非通航孔桥为背景,研究该类桥梁的变形分析方法。在经典梁理论(Timoshenko深梁理论)的基础上引入剪切修正系数以模拟剪切对钢箱梁整体变形的影响,剪切修正系数采用胡海昌计算理论中的矩形分块法计算。采用ABAQUS建立港珠澳大桥深水区非通航孔桥钢箱梁大节段吊装工况下的空间板壳单元有限元模型,对考虑剪切变形的梁单元有限元模型进行校核,验证了该方法的可靠性。通过在工程实施阶段获得的现场实测变形数据,进一步验证了该方法的有效性,桥梁线形控制取得了良好的效果。To carry out the reliably accurate and highly efficient calculation of the structural deformation of the steel box girders in the process of hoisting and installing of large blocks of the girders ,the non‐navigable span bridge of the Hong Kong‐Zhuhai‐Macao Bridge over the deep wa‐ter area was cited as an example and the analysis method for the deformation of the steel box gird‐ers of the bridges that were similar to the Hong Kong‐Zhuhai‐Macao Bridge was studied .Based on the classic beam theory （the Timoshenko′s beam theory） ,the shear correction factors were intro‐duced to simulate the influences of the shear on the global deformation of the steel box girders and the shear correction factors were calculated by the rectangular block method in the Hu Haichang′s calculation theory .The spatial plate and shell finite element model for the steel box girder of the non‐navigable span bridge of the Hong Kong‐Zhuhai‐Macao Bridge under the load case of hoisting and installing of the large blocks was set up by the ABAQUS ,the beam finite element model con‐sidering the shear deformation w as checked and the reliability of the analysis method w as verified . By the deformation data measured in field at the construction stage of the steel box girder ,the ef‐fectiveness of the analysis method is further verified and the effect of the geometric shape control of the steel box girder of the bridge using the analysis method is proved to be sound .

关 键 词：钢箱梁 大悬臂吊装 线形分析 剪切变形 剪切修正系数 深梁理论 梁单元法 有限元法 

分 类 号：U443.35[建筑科学—桥梁与隧道工程] U445[交通运输工程—道路与铁道工程]