中文摘要：

对5个钢管再生混凝土轴压短柱和1个普通钢管混凝土轴压短柱进行试验研究，比较钢管再生混凝土与普通钢管混凝土的破坏模式、荷载一变形关系和承载力关系，分析再生骨料取代率、矿物掺合料和钢纤维对钢管再生混凝土性能的影响．结果表明，钢管再生混凝土轴压短柱与普通钢管混凝土轴压短柱的破坏模式和受力过程基本相同；随着再生骨料取代率的增大，核心混凝土强度降低，变形增大，需要更大的约束效应约束核心混凝土，可以掺入硅粉、粉煤灰等矿物掺合料以及钢纤维来提高钢管再生混凝土轴压短柱的性能．根据现有相关规程对钢管再生混凝土的极限承载力进行计算，得到各规程在计算钢管再生混凝土极限承载力时的适用性．

英文摘要：

By means of experimental investigation of five recycled concrete-filled steel tubular stub col- umns with axial compression and one similar stub with general concrete, their failure mode, relationship of load to deformation, and bearing capacity were compared and the influence of replacement ratio of recy- cled concrete to general one, mineral admixture, and steel fiber on the performance of the recycled con- crete-filled steel tubular stub was analyzed, also. The result indicated that their failure mode and loading process were basically identical. With the increasing of replacement ratio of recycled aggregate to concrete, the compressive strength of kernel concrete reduced and the deformation of the stub columns increased, so that a greater confinement effect was necessary to confine the kernel concrete. Silica fume, fly ash and steel fiber could be admixed to improve the performance of recycled concrete-filled steel tubular stub columns. According to correlative regulations available, the ultimate bearing capacity of recycled concrete filled steel tube was evaluated and the applicability of every regulations in evaluation of ultimate bearing capacity of such stub was obtained.