Abstract
This study developed a novel composite energy-dissipation prefabricated RC beam-column joint featuring a multi-level yielding mechanism, incorporating composite energy-dissipation boxes (EDBs) and friction side plates (FSPs). In order to investigate the synergy work performance between FSPs and metal EDBs, six specimens were fabricated, including series A and series B. The theoretical slip bending moment (Mslide) of the FSPs was determined, followed by low-cycle reversed tests on the specimens to analyze failure modes, hysteresis performance, ductility coefficient and the prediction of load-carrying capacity. The results indicate that FSPs effectively prevent fractures in the dog bone-energy dissipation plates (DB-EDPs) of the EDBs, thereby enhancing ductility and energy dissipation capacity. Furthermore, a theoretical formula for the load-carrying capacity of the plastic joints was developed and experimentally validated, providing accurate predictions for load-carrying capacity in specimens with only EDBs. It is worth noting that the drift ratios at peak loads of the FSPs and EDBs varied among specimens, with an average theoretical to experimental value ratio of 1.20 for the three specimens (S-1-1, S-2-1, and S-3-1) analyzed.
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