目前形状记忆合金（shape memory alloy, SMA）条带约束钢筋混凝土（reinforced concrete, RC）柱研究以试件的宏观损伤为主，而对SMA条带约束RC柱的损伤发展过程及破坏机理的研究较少。为探究SMA条带约束RC柱的力学性能、损伤发展过程及破坏机理，对无约束、被动约束及主动约束试件进行单轴压缩-声发射试验，并结合声发射特征参数、声发射b值与声发射事件定位进行分析。结果表明：①SMA条带主动约束ARC试件的峰值荷载最高为566.39 kN，极限位移最大为3.75 mm，较无约束RC试件分别提升了22.3%和73.61%；②各试件声发射特征参数-应力-时间曲线表现出较好的一致性，随着环向约束增大，声发射振铃及能量明显提升，声发射分布越发集中于第Ⅲ阶段；而声发射b值随着环向约束增大下降阶段不断延后，主动约束下b值下降幅度明显增大；③各约束条件下声发射事件都由试件两端逐渐向中部发展，RC、PRC试件在0.8 f_c之前形成贯通裂纹，而ARC试件贯通裂纹形成于0.8 f_c之后，环向约束越大试件整体性提升越明显。试验成果可为不同SMA条带约束下RC柱的损伤及破坏机理提供一定的理论参考。

At present, the research on shape memory alloy (SMA) strip-confined reinforced concrete (RC) columns is mainly based on the macroscopic damage of the samples, while there are few studies on the damage development process and failure mechanism of SMA strip-confined RC columns. In order to study the mechanical properties, damage development process and failure mechanism of RC columns under the constraint of SMA strips, uniaxial compression-acoustic emission tests were carried out on unconstrained, passively-constrained and actively-constrained samples. The analysis was conducted using acoustic emission characteristic parameters, the acoustic emission b value, and acoustic emission event localization. According to the results, following conclusions were made. The maximum peak load and the maximum limit displacement of ARC samples under active constraint of SMA strips were 566.39 kN and 3.75 mm respectively, which were 22.3% and 73.61% higher than those of unconstrained RC samples. The stress-time curves of the acoustic emission characteristic parameters of all samples showed good consistency. With the increase of circumferential constraints, the acoustic emission ringing and energy increased significantly, and the acoustic emission distribution became more concentrated in the third stage; With the increase of circumferential constraints, the decreasing stage of the value b was continuously delayed, and the decreasing range of the value b was obviously increased under active constraint. Under each constraint condition, acoustic emission events gradually developed from both ends of the sample to the middle of the sample. RC samples and PRC samples formed transfixion cracks before 0.8 f_c, while ARC samples formed transfixion cracks after 0.8 f_c. The greater the circumferential constraint, the more obvious the overall improvement of the sample. The experimental results can provide theoretical reference for the study on the damage and failure mechanism of RC columns under different constraints of SMA strips.