波形钢腹板曲线箱梁桥静力特性  

Static Characteristics of Curved Box Girder Bridge with Corrugated Steel Webs

作　　者：徐勋[1] 余泓 冉川 XU Xun;YU Hong;RAN Chuan(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学土木工程学院,成都610031

出　　处：《铁道建筑》2020年第3期1-5,共5页Railway Engineering

摘　　要：建立了考虑不同力学因素的有限元模型,对不同曲率半径的波形钢腹板曲线箱梁桥的静力特性进行计算,分析了结构主要部位在活载作用下的内力、变形和应力分布随其曲率半径的变化规律。研究结果表明:波形钢腹板使得曲线箱梁桥抵抗翘曲的能力减弱;波形钢腹板箱梁截面正应力横向分布不均匀,钢腹板和混凝土板相交处正应力发生突变;钢腹板剪应力沿腹板高度分布不均匀。The finite element model considering different mechanical factors was established,and the static characteristics of curved box girder bridges with corrugated steel webs with different curvature radius were calculated.The variation laws of internal force,deformation and stress distribution with the curvature radius of the main parts of the structure under live load were analyzed.The research results show that the corrugated steel web weakens the warping resistance of curved box girder bridges with corrugated steel webs.The transverse distribution of normal stress of corrugated steel webs is uneven,and the normal stress at the intersection of steel webs and concrete slabs changes abruptly.The distribution of shear stress of steel webs along the web height is uneven.

关 键 词：公路桥梁 静力特性 数值模拟 波形钢腹板 曲线箱梁桥 曲率半径 

分 类 号：U448.213[建筑科学—桥梁与隧道工程]