祁家渡黄河大桥180m拱桥整体稳定性分析

为分析研究跨度大、宽跨比小的上承式钢管混凝土拱桥的整体稳定性,该文以甘肃主跨180m,宽跨比为1/25.7的上承式钢管混凝土拱桥为例,建立了全桥施工全过程三维有限元模型,计入几何非线性影响,详细分析了该桥成桥状态和施工过程中的横向稳定性,讨论了桥面系边界条件的处理,分析了对其结构整体稳定计算结果的影响,得出了一些有益的结论。

Integral Stability Analysis of Qijiadu Yellow River Bridge

In order to analyze and study the integral stability of deck steel-tube concrete arch bridge with long span and small width-span ratio,the article takes a deck steel-tube concrete arch bridge with 180-m main span and 1/25.7 wide-span ratio in Gansu Province as an example to set up the three-dimension finite element model for the whole process of bridge construction,lists the geometrical non-linear influence,analyzes in detail the completion status of this bridge and the transverse stability in the course of...