摘要
斜拉桥体系中,主塔是受压构件,对于异型主塔,结构重心偏离中轴线位置,空间受力和稳定性比较薄弱,稳定性分析显得极其必要.针对长青沙二桥施工过程中主塔的不同状态,建立主塔有限元分析模型进行稳定性分析;在悬臂施工阶段对比主塔稳定性计算方法,确定了斜拉索保向力对主塔稳定性的贡献.
In the cable-stayed bridge system,the main pylon is compression member. For the special-shaped main pylon,the center of gravity of the structure tends to deviate from the central axis position. So the space force and stability are relatively weak. For the different states of main pylon in the construction stage of the second bridge of Chang Qing-sha,this paper makes stability analysis for the main pylon by construc- ting the finite element model. At the construction stage of cantilever, this paper approves the contribution of cable force to stability of structure contrasting the calculation method of stability of main pylon.
出处
《湖南工程学院学报（自然科学版）》
2014年第1期67-70,共4页
Journal of Hunan Institute of Engineering(Natural Science Edition)
基金
国家自然科学基金资助项目(51078197)
关键词
斜拉桥
异型主塔
稳定性
保向力
cable-stayed bridge
special-shaped main pylon
stability
cable force
