中文摘要：

进行6根圆钢管再生混凝土长柱轴压的静力加载试验,观察试件受力的全过程和破坏形态,绘制出各试件的荷载-变形和荷载-应变关系曲线,分析长径比和套箍系数2个变化参数对试件变形和承载力的影响规律,采用国内外相关规程计算各试件的极限承载力并与实测值进行对比。结果表明：钢管再生混凝土轴压长柱受力过程经历了弹性阶段、弹塑性阶段和塑性下降阶段,均为弹塑性失稳破坏;长径比和套箍系数对钢管再生混凝土轴压长柱的受力性能均有影响,其中套箍系数影响较大;最后对于钢管再生混凝土长柱轴压的承载力计算及构件的设计提出建议。

英文摘要：

Axial static loading test was carried out on 6 recycled aggregate concrete filled circular steel tubular long columns. The whole loading process and failure modes were observed,and the curves of specimens about loaddeformation and load-strain were plotted. The influences of the test parameters namely slenderness ratio and confinement index on deformation and the bearing capacities of specimens were analyzed. By domestic and foreign relevant specifications,the ultimate bearing capacity of the specimens were calculated and compared with the measured values. The results indicated that the failure process of recycled aggregate concrete filled steel tubular long columns under axial compression includes elastic stage,elastic-plastic stage and plastic stage,and all the failure modes are elastic-plastic instability; Both the slenderness ratio and confinement index affect the mechanical performance of recycled aggregate concrete filled steel tubular long columns under axial loading,and the confinement index is more obvious; Finally,the calculation and design method of recycled aggregate filled steel tubular long columns under axial loading were proposed.