Abstract
Beam-column joints are a crucial core part of prefabricated concrete structures. This paper presents a novel prefabricated steel-concrete composite beam-column joint. The design goal was to achieve high ductility and good energy dissipation capacity while improving construction efficiency. Five full-scale fabricated concrete mid-joints were designed and manufactured, including four tensile reinforcement joints (TRJs) and one inner diaphragm joint (IDJ). Tests were conducted to determine the effects of wrapped steel tube thickness, reinforcement plate settings, and typical failure modes of internal connection measures. Seismic performance was analyzed. The results showed that the joints exhibited excellent seismic performance. The increases in the wrapped steel tube thickness cause a failure mode to develop from the joint area’s bending failure to the beam-end bending failure. The joints can provide efficient and reliable connection methods for engineers to design prefabricated concrete structures. The numerical simulation was performed on TRJs based on the experiment, which agreed with the test regarding hysteretic response and typical failure modes. Parameter analysis was used to study the effects of the wrapped steel tube’s extension height, the tensile reinforcement’s diameter, and the layout measures.
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