Abstract An experimental study was conducted to investigate the cyclic behaviour of an innovative prefabricated connection system for steel beam to concrete-filled steel tube (CFST) column. In this connection system, internal stiffeners and threaded steel rods are used to stiffen the panel zone of the connection, and beams in two directions are bolted to the side plates pre-welded to the column side surfaces. Four specimens were examined under reversed cyclic loads applied by hydraulic actuators. Focus of the experimental study is given to hysteretic behaviours of the connections, including the inter-story shear force and drift ratio relationships and moment-rotation behaviours, showing superior energy dissipation than those in reinforced concrete structures in general. Furthermore, a numerical investigation is completed on the seismic performances of steel-concrete composite frame structures with integration of the moment-rotation behaviours of the beam-column connections from the experimental results. The effect of the beam-column connections on the structural behaviours, especially the yielding sequence of the structural components is clarified through this study.

中文翻译：

---

钢梁与钢管混凝土柱预制连接件的循环性能

摘要 进行了一项试验研究，以研究钢梁与钢管混凝土 (CFST) 柱的创新预制连接系统的循环行为。在该连接系统中，内部加强筋和螺纹钢杆用于加强连接的面板区，两个方向的梁用螺栓连接到预先焊接到柱侧表面的侧板上。在由液压执行器施加的反向循环载荷下对四个试样进行了检查。实验研究的重点是连接的滞后行为，包括层间剪力和漂移比关系以及力矩-旋转行为，显示出优于一般钢筋混凝土结构的能量耗散。此外，结合试验结果，结合梁柱连接的弯矩-转动行为，完成了钢-混凝土组合框架结构抗震性能的数值研究。本研究阐明了梁柱连接对结构行为的影响，尤其是结构构件的屈服顺序。