某大斜交角度框架地道桥的设计与分析

林邓线焦作市界至月山段一级公路下穿新月铁路下行线5#框架地道桥,斜交角度为48.3°,受力情况复杂;为改善斜交扭转,提高铁路建筑物的使用寿命,保证铁路后期运营安全,地道桥与铁路线路按正交设计,左右两幅路分别采用（8.5 m＋8.5 m＋8.5 m）三孔连续框构形式。同时利用Sap2000有限元软件采用三维空间板壳单元对该地道桥进行分析,提出了分析时应该注意的几个问题,得到了比较合理的结果,明确了框架地道桥顶底板的结构受力特点,为以后的设计提供参考。

Design and Analysis of Large Skew Angle Framework Bridge

The fifth framework bridge beneath the Xinyue Railway Down line is part of Highway from Linzhou to Dengzhou in Jiaozuo,and its oblique angle is 48.3°,thus the force state is complex.To improve the skew cross and improve the life of the railway buildings,and to ensure the safety of railway operation,the bridge and railway line is designed as orthogonal.Based on the large skew angle framework bridge,using the finite element software sap2000 and three-dimensional space plate shell unit for analysis,this paper puts forward some points that should be paid attention to in analysis and makes clear the structure mechanical characteristics of roof and floor.The conclusion can provide reference for future design.