科研之友
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摘要
A new seismic resilient steel beam-to-column joint using replaceable buckling-restrained plates for energy dissipation was proposed in this paper. Such a joint consists of a column tree and an interior beam segment connected on site through bolted steel plates located inside beam flanges. The steel plates are considered as structural fuses to attract inelastic damage and dissipate energy. Their potential buckling is restrained by intentionally designed C-shaped shear tabs, which are also used to connect the beam webs to transfer the beam shear. Thus, both stable strength and superior energy dissipation capacity can be guaranteed. Six cyclic tests were conducted to study the seismic behavior and post-earthquake repair performance. The results evidenced that this joint was able to develop a normalized cumulative plastic rotation of 550 to 1100 until failure. Fuse plates could be quickly replaced after testing and the repaired joint developed nearly identical seismic performance as the original one. The proposed new joint provides an alternative solution, which is both economical and effective, for seismic resilient steel structures.
