客运专线中V型刚构拱桥极限承载力研究

结合工程实例,运用有限元程序,采用弹性屈曲、几何非线性屈曲、几何和材料双重非线性屈曲三种方法对钢管混凝土拱桥的极限承载力进行了分析,并给出了影响拱桥极限承载力的主要参数,研究表明结构极限承载力与结构材料非线性的考虑与否、材料屈服应力的大小、荷载分布方式以及温度的变化有关联,对此类桥梁稳定性能的研究以及类似桥梁的设计有一定的参考价值。

Research into ultimate bearing capacity of V-type rigid-frame arch bridge in passenger special line

Combined with practical engineering,the author analyzes ultimate bearing capacity of concrete filled steel tube arch bridge by finite element program with three methods as elastic buckling,geometric nonlinear buckling,and geometric and material double nonlinear buckling,proposes main parameters influenced ultimate bearing capacity of arch bridge,and shows that the structural ultimate bearing capacity is related to consider structural material nonlinear or not,size of material yield stress,distribution mode of load,and change of temperature,which has certain referential value for stability research and design of similar bridge.