The behavior of the bond between Engineering Cementitious Composites (ECC) and Glass Fiber Reinforced Polymer (GFRP) bar has a strong effect on the behavior of this composite structure. However, it is difficult to detect the failure mode and damage status of the interface using traditional testing methods. This is due to the strain-hardening mechanical behavior of ECC. An effective monitoring method using patch lead zirconate titanate (PZT) transducers and active sensing technology was used to detect the internal damage. In this active sensing technology, a PZT smart aggregate was bonded onto the middle surface of ECC, acting as a sensor. This study conducted a series of experimental studies on the bond behavior of GFRP-reinforced ECC based on pull-out tests. The test results are presented and discussed to investigate the bond-slip relationship and failure mechanism between FRP reinforcing bars and the ECC matrix. The status of interfacial damage between ECC and GFRP can be represented by the attenuation change of the stress wave. Finally, a damage index (DI) obtained using wavelet packet analysis is proposed to evaluate and quantify the level of FRP–ECC interaction damage. The analytical results reveal that the debonding and failure mechanism can be detected by using this DI index value, and the influence of the diameter of reinforcing bars should be considered, as should the Poisson's effect.

工程水泥基复合材料（ECC）和玻璃纤维增​​强聚合物（GFRP）筋之间的粘结行为对该复合结构的行为有很大影响。但是，使用传统的测试方法很难检测到接口的故障模式和损坏状态。这是由于ECC的应变硬化机械性能。使用贴片锆钛酸铅（PZT）换能器和主动传感技术的有效监控方法来检测内部损坏。在这种主动传感技术中，将PZT智能聚合体粘结到ECC的中间表面上，用作传感器。这项研究基于拉拔测试对GFRP增强ECC的键合行为进行了一系列实验研究。给出并讨论了测试结果，以研究FRP钢筋与ECC矩阵之间的粘结滑移关系和破坏机理。ECC和GFRP之间的界面损伤状态可以通过应力波的衰减变化来表示。最后，提出了使用小波包分析获得的损伤指数（DI）来评估和量化FRP-ECC相互作用损伤的水平。分析结果表明，使用该DI指数值可以检测到剥离和破坏机理，并应考虑钢筋直径的影响以及泊松效应。提出了使用小波包分析获得的损伤指数（DI）来评估和量化FRP-ECC相互作用损伤的水平。分析结果表明，使用该DI指数值可以检测到剥离和破坏机理，并应考虑钢筋直径的影响以及泊松效应。提出了使用小波包分析获得的损伤指数（DI）来评估和量化FRP-ECC相互作用损伤的水平。分析结果表明，使用该DI指数值可以检测到剥离和破坏机理，并应考虑钢筋直径的影响以及泊松效应。