摘要
对宜万铁路线上的一座大跨度刚性梁柔性钢管混凝土拱桥——宜昌长江大桥建立了鱼刺骨、空间梁格、三维仿真3种有限元模型。综合考虑了结构双重非线性因素，对该桥的极限承载力进行了深入研究。分析研究表明，对此类桥梁进行极限承载力分析时，材料非线性比几何非线性更为重要；加强拱脚处的拱肋及缀板能显著提高结构的承载能力。
In this paper, the three-dimensional finite element model for a long-span rigid-framed flexible CFST arch bridge in YiWan railway is established in three different modes, which are back bone model, space beam gird model and solid model. Considering geometric and material nonlinear, the ultimate load capacity of CFST arch bridge at usage is analyzed. The results show that material nonlinear is more important than geometric nonlinear in ultimate capacity analysis. The elastic-plasticity stability can be improved remarkably to reinforce the arch rib and compose plane in the foot of the arch.
出处
《建筑技术开发》
2006年第11期45-47,共3页
Building Technology Development
关键词
几何非线性
材料非线性
极限承载力
Geometric nonlinear
Material nonlinear
Ultimate load capacity
