对6根矩形中空夹层钢管混凝土和1根矩形实心钢管混凝土短柱试件进行轴压试验,研究了内外钢管的长宽比对短柱的力学性能的影响。试验结果表明:比较内管相同的试件,外管截面尺寸较大者其轴压承载力略高;比较外管相同的试件,由于混凝土的减少和内管的局部屈曲,轴压承载力随内管的增大略有下降,本次试验中的实心钢管混凝土短柱的轴压承载力略高于中空夹层钢管混凝土短柱。同时用ABAQUS有限元软件对试件轴压全过程进行了模拟,计算结果与试验结果吻合良好。 Six rectangular hollow concrete filled steel tube specimens and one rectangular concrete filled steel tube specimens were subjected to axial compression tests. The effects of aspect ratio on the mechanical properties of short columns were investigated. The test results show that the axial compressive bearing capacity of the specimens with the same inner tube is larger than those with the same outer tube. Comparing the same specimen with the outer tube, due to the decrease of concrete and the local buckling of the inner tube, As the inner tube increases slightly, the axial compressive bearing capacity of the CFST stub columns in this test is slightly higher than that of the hollow-sectioned CFST stub columns. At the same time, the entire process of axial compression of the specimen was simulated by ABAQUS finite element software. The calculated results agree well with the experimental results.