大斜交角度铁路框架桥结构受力分析

基于平面杆系分析方法和空间有限元分析方法,以单孔框架桥为案例,采用梁单元和板单元分别建立正交、斜交15°、斜交25°、斜交35°、斜交45°、斜交60°的模型,分析计算结果,得出框架桥内力随斜交角度变化的规律,以及空间有限元分析和平面有限元分析下,斜交框架的内力结果的不同之处。并对关于进一步工作的方向进行了简要的讨论。

Structure Stress Analysis of Railway Frame Bridge with a Large Oblique Crossing Angle

Based on plane trussing analyzing method and space finite element analyzing method,this paper takes single-hole and double-hole frame bridge as an example,using beam element and plate element to set up orthogonal,oblique crossing 15 degree,oblique crossing 25 degree,oblique crossing 35 degree,oblique crossing 45 degree and oblique crossing 60 degree models.The analysis of calculation results makes the rule of the changes of frame bridge internal force with the oblique crossing degrees,and the difference between internal forces of oblique crossing frame with the space finite element analysis and plane finite element analysis.Afterwards,a brief discussion is carried out about further work.