In this study, grouted couplers were used to connect steel bars as an alternative approach to the conventional steel bar lapping method. The aim is to avoid bar congestion problems and to reduce the required quantity of steel bars in order to achieve the development length in practice. Two categories of couplers, i.e., short-threaded grout coupler and long grout coupler, in nine groups as well as one group of deformed bars, were tested under uniaxial tension. In total, 30 samples (including three repeated samples in each group) were tested. The examined parameters were types of couplers, embedded bar length, and bar eccentricity. For the short-threaded grout couplers, the embedded bar length, which is equivalent to 8 bar diameter with bar eccentricity equal to zero, exhibited the best performance in terms of strength, ductility, energy absorption, and failure mode, which is suitable to be used in the high seismic zone. Additionally, the short-threaded grout couplers with the embedded bar length equal to 7 bar diameter and the long grout couplers that required embedded bar length that is equal to 8 bar diameter, are suitable to be used in the low-to-medium seismic zone. Besides, the embedded bar length that is smaller than or equal to the 6 bar diameter was not sufficient to be utilised in the short-threaded grout couplers and long grout couplers to resist the seismic load due to inadequate bar embedded length. Also, the predicted model is sufficient to estimate the ultimate tensile strength of the grouted couplers.

在这项研究中，灌浆耦合器被用于连接钢筋，作为传统钢筋搭接方法的替代方法。目的是避免钢筋拥挤问题，并减少所需的钢筋数量，以在实践中达到开发长度。在单轴张力下测试了九类和一组变形钢筋中的两类耦合器，即短螺纹灌浆耦合器和长灌浆耦合器。总共测试了30个样本（每组包括三个重复样本）。检查的参数是耦合器的类型，嵌入的钢筋长度和钢筋偏心率。对于短螺纹灌浆连接器，埋入式钢筋长度（相当于钢筋的8根直径，钢筋的偏心率等于零）在强度，延展性，能量吸收，失效模式，适用于高地震带。此外，埋入式钢筋长度等于7 bar直径的短螺纹灌浆耦合器和要求埋入式钢筋长度等于8 bar直径的长灌浆耦合器适用于中低地震带。此外，小于或等于6 bar直径的预埋钢筋长度不足以用于短螺纹灌浆联接器和长灌浆联接器，以抵抗由于预埋钢筋长度不足而引起的地震载荷。而且，预测的模型足以估计灌浆的耦合器的极限抗拉强度。埋杆长度等于7 bar直径的短螺纹灌浆耦合器和要求埋杆长度等于8 bar直径的长灌浆耦合器适用于中低地震带。此外，小于或等于6 bar直径的预埋钢筋长度不足以用于短螺纹灌浆联接器和长灌浆联接器，以抵抗由于预埋钢筋长度不足而引起的地震载荷。而且，预测的模型足以估计灌浆的耦合器的极限抗拉强度。埋杆长度等于7 bar直径的短螺纹灌浆耦合器和要求埋杆长度等于8 bar直径的长灌浆耦合器适用于中低地震带。此外，小于或等于6 bar直径的预埋钢筋长度不足以用于短螺纹灌浆联接器和长灌浆联接器，以抵抗由于预埋钢筋长度不足而引起的地震载荷。而且，预测的模型足以估计灌浆的耦合器的极限抗拉强度。小于或等于6 bar直径的预埋钢筋长度不足以用于短螺纹灌浆联接器和长灌浆联接器中，以抵抗由于预埋钢筋长度不足而引起的地震载荷。而且，预测的模型足以估计灌浆的耦合器的极限抗拉强度。小于或等于6 bar直径的预埋钢筋长度不足以用于短螺纹灌浆联接器和长灌浆联接器中，以抵抗由于预埋钢筋长度不足而引起的地震载荷。而且，预测的模型足以估计灌浆的耦合器的极限抗拉强度。