Abstract
A novel prefabricated beam-to-column steel joint (PSJ) for precast concrete structures was proposed in this study. The joint had the advantages of easier to fabricate and more environmentally friendly than existing monolithic joint (MJ) cast on site. Low-yield-point steel 100 was used to fabricate the dampers of the joint to provide a high energy dissipation capacity. In addition, the plastic hinge location of the beam can be controlled in the dampers by the buckling energy-dissipation segments (BEDS) of the dampers. Cyclic loading experiments were conducted on three PSJs and an MJ to investigate their seismic performance. The effects of the BEDS’ slenderness ratio on the seismic behaviour of the joints were studied. According to the test results, the PSJs exhibited higher ductility and energy dissipation capacity than the MJ. The BEDS used in the proposed joint were beneficial for concentrating the plastic deformation in the damper, thus preventing the damage to the concrete beams. The decreased slenderness ratio of the BEDS increased the strength of the PSJ. An analytical model that considering the buckling effect was proposed to evaluate the bending moment capacity of the PSJ.
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