部分填充混凝土组合钢桁梁桥静力分析  

Static Analysis of Partially Concrete-filled Composite Steel Truss Bridge

作　　者：周叶飞[1] 李晓坤[1] 李延强[2] 

机构地区：[1]中铁十五局集团有限公司,河南洛阳471000 [2]石家庄铁道大学工程力学系,河北石家庄050043

出　　处：《铁道建筑》2016年第4期9-12,共4页Railway Engineering

摘　　要：部分填充混凝土钢管结构作为一种新型的结构形式,在大跨度组合钢桁梁桥中得到了实际应用。本文以天津海河部分填充混凝土组合钢桁梁桥为研究对象,采用Ansys有限元软件,建立了桥梁结构的空间有限元模型,讨论了恒载情况下部分填充混凝土对组合钢桁梁桥静力性能的影响。结果表明:部分填充混凝土之后钢桁梁桥整体刚度得以提高,静态位移明显减小;这种结构形式能有效减小填充区域受压杆件的应力,且对受拉杆件的影响较小,能大幅提高桥梁的承载力。As a new form of structure,partially concrete-filled steel tube structure is used in long span composit steel truss bridge. In this paper,the research object is a partially concrete-filled composite steel truss bridge across Haihe River in Tianjin. With Ansys,a 3D finite element model was built. The effect of partially filled concrete on static performance of steel truss bridge was discussed under dead load. The results show that,with partially filled concrete, stiffness of the bridge is increased leading to a lower static displacement. This structure effectively decreases stress of concrete-filled compression members,and has little effect on tension members. The carrying capacity of bridge is largely increased.

关 键 词：钢桁梁 部分填充混凝土 静力特性 有限元分析 

分 类 号：U448.216[建筑科学—桥梁与隧道工程]