钢管混凝土拱桥施工稳定性研究

在拱桥桥型中，钢管混凝土拱桥有着明显的技术优势。但随着钢管混凝土拱桥跨径的增大．稳定性成为制约其发展的主要因素之一。根据钢筋混凝土拱桥失稳的力学状态，分析失稳类型，综合考虑几何非线性和材料非线性，运用有限元理论以及双重非线性的方法分析拱桥结构的稳定性．最后结合工程实例，说明非线性理论的重要性。这一研究对于确保施工安全以及成桥状态达到稳定设计水平具有积极的意义。

Stability of Concrete Filled Steel Tubular Arched Bridge in Construction

The concrete filled steel tube arched bridge has a clear technological advantage in comparison with other types of arch bridge. With the increasing of span, stability has become one of the main constraint factors to the development of concrete filled steel tabular arch bridge. According to the mechanical state of reinforced concrete arch bridge＇s instability, the classification of structural instability has been acquired. Considering the geometric and material nonlinearity comprehensively, using the finite element theory and dual non-linear theory, the structural stability of arch bridge is analyzed. Combined with a project instance, the importance of non-linear theory is illuminated. The research fruit has active significant to ensuring construction is safe and finished bridge aehieves stable design state.