悬链线钢箱-混凝土组合拱桥大变形计算和分析  

Calculation and analysis of steel box-concrete composite catenary arch bridge with large deformation

作　　者：杨武 刘小渝[2] 

机构地区：[1]天津市市政工程设计研究院重庆分院,重庆400039 [2]重庆交通大学土木建筑学院,重庆400074

出　　处：《交通科学与工程》2016年第2期41-48,共8页Journal of Transport Science and Engineering

基　　金：国家自然科学基金项目(51078373);西部交通建设科技项目(200631881448)

摘　　要：基于大变形理论,建立组合梁能量泛函方程。利用最小势能原理,推导悬链线钢箱-混凝土组合拱结构的大变形数值计算模型。考虑到钢箱与混凝土交界面的相对纵向滑移和上下掀起效应的影响,对悬链线钢箱-混凝土组合拱结构的位移和应力分布进行了计算。在此基础上,分析了荷载和剪力连接键刚度对钢箱与混凝土交界面的相对纵向滑移、钢箱与混凝土交界面的上下掀起位移、钢箱与混凝土各自滑移面的正应力和剪应力分布及跨中挠度等变形参数的影响,得到了组合拱变形的相关规律,为实际工程中预测和分析悬链线钢箱-混凝土组合拱桥的变形提供了依据。Steel box-concrete composite catenary arch structure is a new type of arch structure in arch bridge design.Based on the theory of large deformation,energy func-tional equation of composite beam is established.Numerical calculation model of large deformation for steel box-concrete composite catenary arch structure is derived by mini-mum potential energy principle,and effects of relative longitudinal slip.Displacement and stress distribution of steel box-concrete composite catenary arch structure have been calculated.Effects of load effect and stiffness of shear connector on relative longitudinal slip and raising displacement up and down on steel and concrete interface,normal stress and shear stress distribution on steel and concrete interface,and midspan deflection have been analyzed.Related principles of composite arch structure have been concluded, which can provide theoretical guidance for predicting and analyzing the deformation of steel box-concrete composite catenary arch bridge.

关 键 词：悬链线 钢箱-混凝土 拱结构 剪力键 大变形 

分 类 号：U448.33[建筑科学—桥梁与隧道工程]