钢管混凝土拱桥施工稳定性数值模拟分析

Numerical Simulation and Analysis of Stabilization of Concrete-filled-steel Tube Arch Bridge in Construction

采用通用有限元软件建立拱桥结构模型，对施工过程进行受力分析计算，并与实际检测数据进行对比，验证了模型的有效性和可靠性，并利用模型进行该桥施工过程中的稳定分析，结果表明，该拱桥稳定系数随全桥刚度的增大而增大，质量的增大而减小，弹性失稳模态均为拱肋侧倾失稳。

3-D structural model was established with current finite element software,and the force applying in construction was analyzed.Compared with detected data,it shows that its correlation is good,the effectiveness of the model is reliable.The models is used to analyze the stability of the construction.The results indicate that the stability increase with the rigidity increase but decreases as the weight gets up.The elastic lateral buckling occurs during the construction in the first place.