大跨斜拉桥钢箱梁空间有限元分析

为了研究大跨斜拉桥扁平钢箱梁在车辆荷载作用下的受力特点,本文以一斜拉桥为工程背景,建立了整体有限元模型和局部模型。在对整体模型分析的基础上,应用子模型法对该斜拉桥扁平钢箱梁各关键截面进行了有限元受力分析,研究了其应力水平及其分布特点,并总结了大跨斜拉桥扁平钢箱梁的受力特性。其结论可以为同类型桥扁平钢箱梁的设计提供参考。

Spatial Finite Element Analysis of Steel Box Girder of Long Span Cable-stayed Bridge

In order to investigate the mechanical characteristic of flat steel box girder of long span Cable-Stayed bridge,Runyang cable-stayed bridge is taken as example in the paper.The whole finite element(FE)model and re- fine submodel are established respectively.The submodel method is used to analyze local stress of key sections of steel box girder of a cable-stayed bridge,and the stress level and distribution characteristic of steel box girder is summa- rized,the mechanical characteristic of steel box girder of long span cable-stayed bridge is further summarized systemati- cally.In the paper the analysis results which provides reference for design of the same type bridge manifest that the sub- modeling method is more effective and it can accurately calculate the stress response of steel box girder.