考虑滑移的波形腹板钢箱-混凝土组合箱梁桥挠度分析  

Deflection Analysis of Corrugated Web Steel-concrete Composite Box Girder Bridge with Slip Considered

作　　者：吴超 丁南宏[1] WU Chao;DING Nanhong(School of Civil Engineering,LanzhouJiaotong University,Lanzhou 730070,China)

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070

出　　处：《兰州工业学院学报》2021年第6期1-6,共6页Journal of Lanzhou Institute of Technology

基　　金：国家自然科学基金资助项目(51268028)。

摘　　要：考虑滑移的影响,建立了在半波正弦荷载下组合箱梁的挠曲微分方程,推导了挠度的解析式.结合一座跨径30 m的组合箱梁桥,建立空间实体有限元分析模型,以箱间横联的数量与刚度为参数进行分析,获得了挠度分布规律.结果表明:滑移效应会增大组合梁的挠度;在对称荷载下,箱间横联数量和刚度的增加会减小主梁挠度;在偏载荷载下,主梁的挠度会随着箱间横联数量和刚度的增加而增加;箱间横联的位置宜设置在梁端和跨中位置处.Considering the influence of slip,the deflection differential equation of composite box girder under half-wave sinusoidal load is established,and the analytic formula of deflection is derived.Combined with a 30m span composite bridge,the finite element analysis model of spatial entity was established,and the number and stiffness of cross-connection between boxes were analyzed as parameters,and the deflection distribution law was obtained.The results show that the slip effect increases the deflection of composite beams.Under symmetric load,the increase of the number and stiffness of cross-links between boxes will reduce the deflection of the main beam.Under partial load,the deflection of main beam will increase with the increase of the number and stiffness of cross-links between boxes.The horizontal connection between boxes should be set at the beam end and the middle of the span.

关 键 词：钢混组合箱梁 挠度 滑移 箱间横联 有限元分析 

分 类 号：U448.21[建筑科学—桥梁与隧道工程]