钢箱梁桥中关于大跨隐形钢盖梁的设计与研究

Discussion on the Design and Research of Long-Span Hidden Steel-Covered Girder in Steel Box Girder Bridge

目前,城市中很多钢箱梁桥需要跨越现状道路,而主梁加盖梁的复合高度使桥下净空受限,无法满足桥下的净空要求。而大跨径隐形钢盖梁能大量节省桥下空间、能减小桥梁相对规模,并且带来较大经济效益,在大跨度钢箱梁桥梁建设中得到了关注。论文以某实际工程为例,结合钢结构设计制造经验及有限元计算,探讨如何科学、合理地设计隐形钢盖梁结构。

At present,many steel box girder Bridges in the city need to span the current road,and the compound height of the main girder girder makes the clearance under the bridge limited,which can not meet the clearance requirements.The long-span steel-covered girder can save space under the bridge,reduce the relative size of the bridge,and bring greater economic benefits,which has been paid more attention to in the construction of long-span steel box girder bridges.Taking a practical project as an example,this paper discusses how to design the invisible steel cover beam structure scientifically and rationally,combining with the experience of steel structure design and manufacture and finite element calculation.