铁道标准设计2017，Vol.61Issue(6)：73-76,4.DOI:10.13238/j.issn.1004-2954.2017.06.016
大跨度钢桁梁柔性拱桥稳定性能研究
Study on Stability of Large-span Continuous Steel-truss Bridge Stiffened by Flexible Arch
摘要
Abstract
A large-span double-line railway bridge composed of continuous steel-truss bridge and flexible arch is arranged in spans of 130 m+338 m+338 m+130 m. Both the span and the construction scale are the larges of its kind. The stability of the bridge remains an outstanding problem and makes the design very difficult. This paper studies on the first type and the second type of stability under dead and live loads. The research results show that (1) the bearing capacity is overestimated in the first type of stability analysis and can't be based to design the bridge;(2) the material nonlinear influence is dominated in the second type of stability, and the influence of geometric nonlinearity can be ignored; ( 3 ) the way of loading brings significant impact on stability analysis, and it is the worst case when train live load is placed on every other span, while the ideal loading is achieved when live load is distributed fully on the bridge;(4) this bridge has sufficient safety bearing capacity and the structural design is reasonable.关键词
铁路桥/大跨度钢桁梁/柔性拱/稳定性/承载力Key words
Railway bridge/Large-span steel truss/Flexible arch/Bearing capacity分类
交通工程引用本文复制引用
夏正春..大跨度钢桁梁柔性拱桥稳定性能研究[J].铁道标准设计,2017,61(6):73-76,4.基金项目
中铁第四勘察设计院集团有限公司科技研究开发计划项目(2016K22) （2016K22）
