覆土波形钢板拱桥工作性能数值分析

Numerical Analysis on Working Performance of Buried Corrugated Steel Arch Bridge

为了探究覆土波形钢板拱桥的受力特征,利用有限元软件及其MPC算法并结合国外设计规范对一座实际钢波纹板拱桥进行了施工阶段和成桥使用阶段受力性能分析,同时对影响拱桥受力的不利工况及参数进行分析探讨。分析结果表明,随施工阶段填土变化,尤其在填土至拱顶附近时,结构受力及变形有较大的变化;实际应以有限元计算结果指导该结构的设计与施工;该结构力学性能优异,特别是对不良地质和温降的适应能力要远强于普通混凝土拱桥。

To explore the mechanical behavior of the buried corrugated steel arch bridge, the analysis of behavior during construction and using stage were established,according to finite element and foreign design codes,which was based on a real corrugated steel arch bridge. Also, the unfavorable conditions and parameters were discussed, which affected the stress behavior of the arch bridge. The result shows that the stress and displacement varies during construction stage, especially near the top of the arch when backfilling ; The results of the finite element analysis should be used for conducting its designing and constructing;Also, the mechanical properties of the structure excel common concrete arch bridges, especially on the adaptation of the poor foundation and the dropping temperature.