钢管混凝土拱桥拱轴线施工误差影响分析

Analysis of arch axis deviation for concrete filled steel tubular arch bridge

选取单圆管、哑铃型、桁式截面的钢管混凝土拱桥各一座,建立有限元模型,分析了面内外、正反对称拱轴线施工误差对成桥状态下使用受力性能和极限承载力的影响.研究结果表明:目前桥梁施工规范中对钢管混凝土拱桥拱轴线施工误差的限定是较为合理的,其对钢管混凝土拱桥正常使用状态下的受力性能以及极限承载力均影响较小.

Three different type CFST arch bridges with cross setion of single tubular,dumbbell shape and truss are taken as case study to bulid FEM model.The analysis of the effect to mechanical character by arch axis deviation with the types of in-plane,out plane,symmetry and antisymmetry are carried out.The research results shown that the limit of arch axis deviation in present bridge construction code is rational.It has little effect to the performance and ultimate carrying capacity for CFST arch bridges.