局部圆钢管约束钢筋混凝土桥墩力学性能有限元分析

Finite element analysis of bridge pier mechanics behavior of reinforced concrete partially confined with round steel pipe

基于ABAQUS混凝土损伤塑性模型,建立了钢筋混凝土桥墩、局部外包圆管约束钢筋混凝土桥墩和局部内置钢管钢筋混凝土桥墩的有限元计算模型,并对其进行了低周反复荷载试验下全过程的非线性有限元分析,得到了相应的滞回曲线、骨架曲线及等效刚度退化曲线。分析表明与钢筋混凝土高桥墩相比局部约束钢管钢筋混凝土高桥墩具有更好的延性性能,为桥墩的延性抗震设计提供一种备选方案。

Based on the ABAQUS concrete damaged plasticity, the finite ele ment calculation models for RC bridge pier, RC bridge pier partially confined with outer steel tube and RC bridge pier partially confined with inner steel tube were es tablished, their nonlinear finite element analysis of the whole process under repeat curves, and equivalent stiffness degradation curve of the steresis curves, skeleton bridge piers were ob rained. The analysis shows that, compared with the reinforced concrete piers, the partially steel tube confined reinforced concrete piers have better ductility perfor mance and provide an option for ductile seismic design of bridge pier.