南宁永和大桥双重非线性稳定分析

Double Nonlinear Stability Analysis for the Yonghe Bridge

考虑拱肋初始挠度等缺陷的影响 ,采用钢管混凝土组合材料的本构关系 ,建立钢管混凝土拱桥非线性稳定的计算方法 ,并编制相应的计算程序。通过模型试验验证 ,对南宁市永和大桥的双重非线性稳定问题和后屈曲问题进行分析研究。

Taking into account of the effects of imperfection and large displacement of arch rib, an approach to the double nonlinear stability analysis of concrete-filled steel tubular arch bridge is presented. A program are developed and it can predict the nonlinear buckling of arch bridge. Based on the constitutive relations of combinatorial material of concrete-filled steel tube, the double nonlinear stability and post-buckling problems of the Yonghe Bridge in the city of Nanning are analyzed under static loads. The results of a model test have shown that the test results are in good agreement with the numerical results.