铁道科学与工程学报2016，Vol.13Issue(5)：853-862,10.
外倾式拱梁组合桥梁的稳定性研究
Stability analysis of external slanted arch-bea m co mbination bridges
摘要
Abstract
The external slanted arch-beam combination bridge is a new type of bridge,and the stability prob-lem of its external slanted arch is significant.This paper took the Aixi Lake Bridge located in Nanchang city as the real-world engineering project and established the spatial finite element model of the bridge accordingly.In combination with the existing stability analysis theories for arch bridges,the stability of the Aixi Lake Bridge was analyzed with the process of suspenders tension and the completed bridge state taken into account.The analysis results indicate that the bucking mode of the bridge is mainly shown by out-plane bucking of the arch rib,and that the influence of geometrical nonlinearity and material nonlinearity on the stability of the bridge is significant. Adopting the pattern of tensioning inner-suspenders and outer-suspenders sequentially can improve the stabili-ty level of the bridge during the process of suspender tension.The outer-suspenders have positive impacts on the stability of the bridge;therefore,adopting the form of spatial multi suspenders system can improve the stabili-ty level significantly.Furthermore,through a number of calculations and analyses,the effects of geometrical pa-rameters of arch rib,such as the ratio of height to span,camber angle and section rigidity,on the stability of the bridge are revealed with several insightful conclusions drawn.The findings in this paper can provide useful refer-ence and guidance for similar projects.关键词
外倾式拱肋/稳定性分析/弹性屈曲/非线性/成桥状态/吊杆张拉过程/参数分析Key words
external slanted arch rib/stability analysis/elastic buckling/nonlinearity/completed bridge state/suspenders tensioning process/parameters analysis分类
交通工程引用本文复制引用
傅金龙,黄天立,夏智..外倾式拱梁组合桥梁的稳定性研究[J].铁道科学与工程学报,2016,13(5):853-862,10.基金项目
国家自然科学基金资助项目（51478472）；湖南省自然科学基金资助项目（2015JJ2176）；英国牛顿基金资助项目 （）
