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给出轴压下钢管混凝土短柱性能的试验和理论研究。共对14根圆钢管混凝土短柱和15根方钢管混凝土短柱进行试验,以研究钢管混凝土短柱的失效模式和轴压性能。分析了直径(或宽度)、相对厚度比对钢管性能的影响。试验结果表明:在相同配钢率的前提下,钢管混凝土短柱比普通混凝土短柱的受压承载力大。钢管的弹塑性分析可用于研究轴压下钢管混凝土短柱的破坏机理。基于已有的试验成果,提出求解钢管混凝土短柱的轴向受压强度的方程式。
The experimental and theoretical research on the behavior of short concrete filled steel tubular columns under axial compression is given. A total of 14 short CFST columns and 15 CFST short columns were tested to study the failure modes and axial compression properties of CFST short columns. The influence of diameter (or width) and relative thickness ratio on the performance of the steel pipe was analyzed. The test results show that the compressive bearing capacity of short concrete filled steel tubular columns is higher than that of ordinary concrete short columns under the same steel ratio. Elastic-plastic analysis of steel pipe can be used to study the failure mechanism of short concrete filled steel tubular columns under axial compression. Based on the existing experimental results, an equation for solving the axial compressive strength of concrete filled steel tubular short columns is proposed.