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通过试验和理论对空、实心钢管再生混凝土柱的极限承载力做了研究,研究表明,实心钢管再生混凝土短柱可以采用实心钢管普通混凝土短柱的极限承载力计算公式。空心钢管再生混凝土长柱的承载力与再生混凝土弹性模量有关。火灾试验表明,钢管再生混凝土长柱的耐火性能要优于钢管普通混凝土,根据试验提出了钢管再生混凝土柱耐火时间的计算公式。
The ultimate bearing capacity of concrete columns filled with fresh steel and solid steel tubes was studied through experiments and theoretical studies. The results show that the formula for calculating the ultimate bearing capacity of short concrete columns filled with solid steel tubes can be used to calculate the ultimate bearing capacity of concrete filled steel tubular short columns. The bearing capacity of long steel tubular recycled concrete columns is related to the elastic modulus of recycled concrete. Fire tests show that the fire resistance of long columns of recycled concrete pipe is better than ordinary steel pipe. According to the test, the formula of refractory time of recycled concrete columns of steel pipe is proposed.