双层预应力混凝土箱梁薄壁截面受力分析

Force Analysis of the Thin-Wall Section of Double-layer Prestressed Concrete Box Girder

为了研究双层预应力混凝土箱梁薄壁截面的结构受力及动力特性,本文以某跨河大桥设计为背景,结合工程实例,采用空间有限元分析软件建立模型,分析短暂状态和持久状态下结构的应力分布规律及承载能力。其间通过分析计算结果,针对双层预应力混凝土箱梁结构断面设计中需要注意的问题提出建议,为以后类似工程设计提供参考。

In order to study the structural force and dynamic characteristics of the thin-walled section of the doublelayer prestressed concrete box girder,this paper took the design of a river-crossing bridge as the background,com⁃bined with engineering examples,and used the spatial finite element analysis software to establish the model and ana⁃lyze the stress distribution law and bearing capacity of the structure in the transient state and the persistent state.In the meantime,through analysis and calculation results,suggestions are made for the problems that need attention in the design of the double-layer prestressed concrete box girder structure,thus providing reference for the design of similar projects in the future.