支线上跨梁桥合理结构形式研究

Research on reasonable structure form of cross beam bridge on branch line

支线上跨桥是上跨高速公路常见的结构物,文章分析了T形梁、小箱梁和新型的钢板组合梁这3种结构形式的梁桥特点,从截面特性、外观美学、线型与刚度、受力特征、装配化与整体性、经济性等方面,分别对3种结构进行了综合性的比较,探讨了支线上跨的合理选型问题。

The branch line up span bridge is a common structure on the expressway.It belongs to the medium and small span bridge,and has strong affinity with the simple and convenient precast assembly beam bridge.This paper discusses the characteristics of T bridge girder,box girder and steel composite beam model of the three structures,from the cross section characteristics,aesthetic appearance and linear stiffness and stress characteristics,assembly and integrity,economy and other aspects,respectively to three kinds of structure has a comprehensive comparison.Discusses the problem of rational selection and extension of the cross.