基于混凝土损伤塑性本构模型的桥墩仿真分析

由于花瓶墩的体型巨大且几何构型不规则，采用一般的杆系单元方法只能近似分析其力学性能。利用ABAQUS的三维实体单元，分析该墩在组合工况作用下的三维应力分布情况，建立钢筋混凝土损伤塑性本构，计算桥墩混凝土开裂区的钢筋应力，分析混凝土裂缝的分布情况。与杆系单元相比，考虑混凝土损伤塑性本构关系的实体有限元仿真，更能直观精确地显示出非规则性结构的受力及细部裂缝的空间分布情况。

A simulation analysis of bridge pier model based on concrete damage plasticity constitutive

Because of the vase pier huge and irregular geometry, the beam element method can only be used to make an approximate analysis of its mechanical properties. The 3D entity unit of ABAQUS can be used to analyze the pier in the combined conditions of 3D stress distribution, set up the reinforced concrete damage plasticity constitutive, calculate the steel pier concrete cracking of the stress distribution and analyze the concrete cracks. Compared with the unit and the bar, concrete damage plasticity finite element simulation of constitutive is more intuitive to accurately depict the irregular structure stress and details of the spatial distribution of minor cracks.