为研究钢管高强混凝土组合柱的轴心抗压性能,利用高强混凝土和钢管混凝土本构关系,对组合柱轴心抗压受力全过程进行了数值计算,计算轴力一纵向应变曲线与试验结果吻合良好;并与钢筋混凝土柱进行了对比,定量分析了套箍指标、混凝土强度和配箍特征值对轴压承载力和纵向应变延性的影响。
To study the centric axial compressive behavior of high strength concrete filled steel tube composite columns, numerical analysis of the whole process of composite columns subjected to centric axial compressive loading was conducted,by using the constitutive laws of high strength concrete and concrete-filled steel tube.The numerical results agreed well with the experimental results.Comparison analysis between the behavior of composite columns and reinforced concrete columns were carried out.The influence of confinement index,concrete strength and stirrup characteristic value on the centric axial bearing capacity of composite columns was analyzed quantitatively.