大跨径钢管混凝土拱桥复合非线性研究及合理设计探讨

Study on Hybrid Non-linearity Characteristics and Reasonable Design for Concrete-filled Steel Tubular Arch Bridge with Long-span

通过运用结构的复合非线性 (几何非线性和材料非线性 )极限分析理论 ,对国内一座在建的 36 8m大跨径钢管混凝土中承式系杆拱桥进行了复合非线性稳定性空间分析 ,在此基础上 ,还对该钢管混凝土拱桥主拱肋矢跨比。

In this paper, a hybrid non linearity spatial stability analysis for a concrete filled steel tubular tied arch bridge with the span of 368 m under construction is realized by using ultimate load analysis theory of hybrid non linearity. Based on the above analysis, a discussion on reasonable design of ratio of height to clear span, thickness of steel tube and class of concrete, etc. for the concrete filled steel ribbed arch is also presented.