对7 个不同结构的方形钢管混凝土短柱进行了轴压试验研究，讨论了其各自的轴压极限承载力、轴压破坏特点、延性及相应耗钢量． 结果表明: 在轴压荷载作用下，设置约束拉杆的钢管混凝土柱对核心混凝土的约束作用明显改善，但分布仍不够均衡，整体混凝土强度及混凝土延性提高受限; 设置劲化带后，在用钢量增加较少的情况下，钢管壁对核心混凝土的约束作用相对于普通带拉杆钢管混凝土柱更趋均匀，提高了整体约束效应，改变了钢管的局部屈曲变形状态，提升了钢管混凝土柱的轴压承载力和延性; 劲化带宽厚比对带约束拉杆方形钢管混凝土试件的轴压性能影响显著，随着劲化带宽厚比的减小，钢管混凝土柱试件的承载力增大，试件发生局部屈曲时对应的纵向应变增大，延性系数增大．

Seven concrete-filled steel tubular stub columns with different structures were investigated by an axialcompressive test in terms of the ultimate axial bearing capacity,the characteristics of the axial compressive failureand deformation,the ductility and the steel consumption.Experimental results indicate that ( 1) under axial compressiveloads,the restraint of the CFST column with binding bars on the core concrete is obviously improved,butthe corresponding distribution is uneven,thus limiting the increase of the overall strength and ductility of the concrete;( 2) as compared with the common square CFST column,the stiffened square CFST column uses less steeland achieves a more even restraint distribution,a better overall restraint effect,a greater axial bearing capacity,and a better ductility as well as less local buckling between the binding bars; and ( 3) the width-thickness ratio ofthe square CFST column greatly affects the corresponding axial compressive behavior; specifically,the bearing capacityductility coefficient of the CFST column as well as the longitudinal strain corresponding to the local bucklingincreases with the decrease of the width-thickness ratio.