大跨径钢管混凝土劲性骨架拱桥非线性分析

以某实桥工程为研究对象,采用ANSYS建立全桥空间计算模型,对大跨径钢管混凝土劲性骨架拱桥线性和非线性的施工全过程进行受力分析。通过对整个施工全过程内力、应力和挠度的分析,研究其截面刚度随施工变化对大跨径钢管混凝土劲性骨架拱桥非线性的影响,以及施工设计中分环分段的合理性。

Nonlinear Analysis of Long Span Arch Bridges Reinforced with Concrete-Filled Steel Tubes

Taking an actual bridge project as the research object,this paper establishes a spatial calculation model for a whole bridge structure by means of finite element program ANSYS for the purpose of mechanical analysis of both linearity and nonlinearity of long span arch bridges reinforced with concrete-filled steel tubes in their construction process.On the basis of analysis of the internal forces,stress and deflection of the bridges in the whole construction process,the paper then conducts a study of influences from construction-variant sectional rigidity on the nonlinearity of the bridges and rationality of dividing construction procedures and stages for the bridges in the working design.