Abstract
This paper proposes a new seismic resilient steel beam-to-column joint using replaceable buckling-restrained energy dissipation fuse plates. Such a joint consists of a column tree where the beam stud is welded to the column in shop, and a midportion beam connected to the stud beam on site by using fuse plates, C-shaped shear tabs and high-strength bolts. The C-shaped shear tabs are used to connect beam webs and transfer the shear force while the fuse plates to connect beam flanges and transfer the bending moment. Specifically, the C-shaped shear tabs and beam flanges provide out-of-plane restraints for fuse plates to guarantee stable development of both moment strength and energy dissipation capacity, and the damaged fuse plates can be replaced after earthquakes. Three full-scale joint specimens were tested under cyclic loading to study their seismic behaviour and resilience. Test results showed that this kind of joint was able to shift the plastic damage from the beam-to-column welded connection to the replaceable fuse plates while the beam and column were basically elastic. Based on a comparative analysis, flat fuse plates (FP) and C-shaped shear tabs with the stiffener are recommended to ensure the easy repairability of the joint even after a large story drift. The repaired joint developed nearly identical seismic performance as the original one. This new joint provides an alternative solution, which is both economical and effective, for seismic resilient steel structures.
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Chen, P., Hu, F., Pan, J., Wang, Z. (2022). Seismic Performance of Steel Beam-To-Column Joint with Replaceable Buckling-Restrained Energy Dissipation Fuses. In: Mazzolani, F.M., Dubina, D., Stratan, A. (eds) Proceedings of the 10th International Conference on Behaviour of Steel Structures in Seismic Areas. STESSA 2022. Lecture Notes in Civil Engineering, vol 262. Springer, Cham. https://doi.org/10.1007/978-3-031-03811-2_90
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DOI: https://doi.org/10.1007/978-3-031-03811-2_90
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