钢-UHPC组合梁与钢箱梁结合段有限元分析  

Finite Element Analysis of Steel-UHPC Composite Beam-steel Box Girders Joint Section

作　　者：刘沐宇[1,2] 邢恒 邓晓光 冯鹏程[3] 刘新华[3] LIU Muyu;XING Heng;DENG Xiaoguang;FENG Pengcheng;LIU Xinhua(School of Civil Engineering&Architecture of Wuhan University of Technology,Wuhan 430070,China;Hubei Key Laboratory of Roadrway Bridge&Structure Engineering.Wuhan University of Technology,Wuhan 430070,China;Second Highuay Survey Design and Research Institute of China Commumication,Wuhan 430056,China)

机构地区：[1]武汉理工大学土木工程与建筑学院,武汉4430070 [2]武汉理工大学道路桥梁与结构工程湖北省重点实验室,武汉4430070 [3]中交第二公路勘测设计研究院有限公司,武汉430056

出　　处：《武汉理工大学学报(交通科学与工程版)》2025年第2期374-379,386,共7页Journal of Wuhan University of Technology(Transportation Science & Engineering)

基　　金：湖北省重点研发项目(2020BCB065,2020BAB081)。

摘　　要：针对某主跨1 160 m的混合式组合梁斜拉桥主梁结合段设计方案的受力性能分析问题,采用ABAQUS软件建立实桥的钢箱梁-组合梁结合段的精细化有限元模型,计算得到实桥模型在最大轴力工况、最大弯矩工况下的应力特征.结果如下:钢箱梁-组合梁结合段在最大弯矩工况下,钢结构最大Mises应力为158.5 MPa, UHPC桥面板最大轴向压应力为16.9 MPa,最大主压应力为17.1 MPa,最大拉应力为2.4 MPa;承压板分担了5.87×10^(4) kN的轴力,占总轴力的36%,钢箱梁承担总轴力的64%,传力均匀明确,传力路径清晰,结合段受力满足规范要求.Aiming at the mechanical performance analysis of a hybrid composite beam cable-stayed bridge with a main span of 1160 m,ABAQUS software was used to establish a refined finite element model of the steel box beam-composite beam joint section of the real bridge,and the stress characteristics of the real bridge model under the maximum axial force and maximum bending moment were calculated.The results are as follows:under the maximum bending moment condition,the maximum Mises stress of steel structure,the maximum axial compressive stress of UHPC bridge deck,the maximum principal compressive stress and the maximum tensile stress are 158.5 MPa,16.9 MPa,17.1 MPa and 2.4 MPa,respectively.The bearing plate shares the axial force of 5.87×10^(4) kN,accounting for 36%of the total axial force,and the steel box beam bears 64%of the total axial force.The force transmission is uniform and clear,and the force transmission path is clear,and the joint section meets the requirements of the code.

关 键 词：超千米主跨斜拉桥 钢箱梁-组合梁结合段 有限元模拟 应力分析 传力机理 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]