本文研究加工出一种超弹性Ni-Ti SMA带肋筋，以解决传统光圆形状记忆合金（shape memory alloys，SMA）棒材与混凝土基材粘结性能不足的问题。试验设计制作了一根超弹性带肋SMA筋增强ECC梁及4根对照组矩形截面适筋梁，应用数字图像相关技术进行同步观测采集，计算分析梁的表面裂缝发展情况。对梁进行四点弯曲低周单向循环加载试验，以研究受弯梁的各项力学性能。研究结果表明：经时效热处理后的带肋SMA筋与光圆SMA筋相比超弹性滞回效应相似，且超弹性性能有所提升。与其他试验梁相比，带肋SMA筋增强ECC梁的变形延性、极限承载力、自复位能力和裂缝控制能力均得到显著提升。所有梁在整个加载过程中未出现受拉纵筋滑移和断裂现象，受拉纵筋与混凝土协同工作性能良好。基于材料一维本构模型和具体假设的基础上，推导并建立了所研究复合梁的承载力简化计算模型，并有效验证其准确性。

In order to solve the problem of insufficient bonding performance between traditional bare round SMA bars and concrete substrates, a superelastic Ni-Ti SMA ribbed reinforcement is processed in this paper. A superelastic ribbed SMA bar reinforced ECC beam and four control rectangular cross-section adapted beams were experimentally designed and fabricated, and digital image correlation technology was applied for simultaneous observation and collection to calculate and analyse the surface crack development of the beams. The beams were subjected to four-point bending low circumferential unidirectional cyclic loading tests to investigate the mechanical properties of the beams subjected to bending. The results show that the superelastic hysteresis effect of the ribbed SMA bars after ageing heat treatment is similar to that of the bare round SMA bars, and the superelastic properties are improved. The deformation ductility, ultimate load carrying capacity, self-reinstatement capacity and crack control capacity of ECC beams reinforced with ribbed SMA tendons were significantly improved compared with other tested beams. All the beams did not show any slip or fracture of the tensile tendons during the whole loading process, and the tensile tendons worked well with the concrete. Based on the one-dimensional intrinsic model of the material and specific assumptions, a simplified calculation model of the load carrying capacity of the studied composite beams is deduced and established, and its accuracy is effectively verified.