This study evaluates the structural performance of reinforced concrete interior beam–column joints having high-strength screw-type steel bars mechanically connected with couplers. A total of six full-scale specimens were cast and subjected to repeated cyclic lateral loads. High-strength screw-type reinforcing bars, with a yield strength of 690 MPa, were used as longitudinal reinforcement of the specimens. The main test variables were designed with and without couplers and the longitudinal reinforcement ratio of the beam. The couplers were applied to the plastic hinge zones of columns and beams to maximize their impact. The experiment confirmed that the flexural cracks generated near the couplers slightly influenced the initial stiffness, the yielding point of the longitudinal reinforcement of the beams, and the displacement at peak load of the specimens. However, the load versus story drift relationship, the peak load, and the ductility capacity of the specimens were not significantly affected. In addition, the analytical results obtained using the current structural design codes and finite element analysis were similar to the experimental results.

本研究评估了钢筋混凝土内部梁柱节点的结构性能，该节点具有与耦合器机械连接的高强度螺纹型钢筋。总共铸造了六个全尺寸试样并承受重复的循环横向载荷。试件的纵向钢筋采用屈服强度为690 MPa的高强度螺纹型钢筋。主要测试变量是设计有和没有耦合器以及梁的纵向配筋率。耦合器应用于柱和梁的塑性铰区，以最大限度地发挥其影响。试验证实，连接件附近产生的弯曲裂缝对梁的初始刚度、纵向钢筋的屈服点、以及试样在峰值载荷下的位移。然而，荷载与楼层漂移的关系、峰值荷载和试件的延性能力没有受到显着影响。此外，使用现行结构设计规范和有限元分析获得的分析结果与实验结果相似。