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对中空夹层钢管混凝土构件进行了加载试验研究,该试件由内外十二边形钢管之间灌注混凝土而成,试件分别受轴力和弯矩作用。通过试验获得了试件的破坏模式和极限承载力,试验结果表明,内外钢管均会发生受压局部屈曲,与相关规范公式和已有公式的计算结果进行比较,中空夹层钢管混凝土构件已在实际工程中得到成功应用,取得了良好的经济效益。
The hollow sandwich concrete-filled steel tube was subjected to loading test. The specimen was filled with concrete between inner and outer dodecagonal steel tubes. The specimens were subjected to axial force and bending moment respectively. The failure modes and ultimate bearing capacity of the specimens were obtained through experiments. The test results show that the local buckling of both the inner and outer steel pipes will occur under pressure. Comparing with the calculation results of the relevant standard formula and the existing formulas, the hollow- The project has been successfully applied, and achieved good economic returns.