城市双线地铁高架桥箱梁结构设计力学行为分析

Analysis on Mechanical Behavior of Structure Design for Box Girder of Elevated Bridge in Two-lane City Subway

以城市轨道交通中的双线地铁高架桥为研究对象,设计了30m跨简支箱梁结构。采用ANSYS大型通用有限元程序,在地铁列车活载不同位置情况下,分析了箱梁结构的力学行为,最后得出控制箱梁结构设计的内力和变形值以及相应的荷载作用最不利位置。其研究成果将对我国城市轨道交通(地铁或轻轨)高架桥的设计提供参考。

An elevated bridge of two - lane subway in urban rail transit was taken as a study example. A simple box girder with 30m span was designed. When subway live load was in different locations, the mechanical behaviors of box girder structure were analyzed with ANSYS Program. Finally, the control values of internal forces and deformation were given, and the most disadvantageous position of the load was also given. The research results would provide references for designing elevated bridge in urban rail transit.