轴压下角钢套箍高强混凝土短柱承载力分析与设计建议

In order to promote angle-steel confined high-strength concrete columns（ACHCC）widely application in new and reinforcement projects of civil engineering, this paper took the hoop coefficient, strength grade of concrete and yield strength of steel as parameters, 15 ACHCCs with a shear span ratio of 1.5 were designed under axial compression. Based on simplified steel constitutive model and confined concrete constitutive model considering hoop effect, the finite element simulation analysis on them was carried out under the axial pressure, by comparing with the experimental data the rationality of finite element modeling is verified. The author investigate the different hoop coefficient, different concrete strength grade and different yield strength of steel for influence of bearing capacity of ACHCC in further, the results show that hoop coefficient for influence of bearing capacity of short column is significantly. Using 1stopt software calculation formula of bearing capacity of ACHCC under axial compression is gotten by satiation and regression, and the design method of this kind of column is put forward, which can lay a foundation for the wide application in practical engineering.