基于 OpenSees 的超高强钢管混凝土承载力数值模拟

摘要

通过查阅文献找到了适合超高强约束混凝土的本构模型，采用OpenSees建立了超高强钢管混凝土的纤维单元模型，对不同径厚比超高强钢管混凝土的轴压、滞回性能进行模拟，找到径厚比参数对超高强轴压、滞回性能的影响，并与规范采用的极限平衡法轴压极限承载力公式进行对比，得出了一些结论。%By consulting literature, the paper finds the constitutive model for the super-high confined concrete, adopts OpenSees to establish the fiber unit model of the super-high strength steel pipe concrete, simulates the axial pressure and hystersis behavior performance of the super-high strength steel pipe concrete with various radius-thickness ratio, locates the radius-thickness ratio parameter’ s influence on the super-high strength axial pressure and hystersis behavior, compares it with the axial pressure limited loading capacity formula with limited balance method, and a-chieves some conclusion.