Abstract
To improve the seismic resilience of steel moment-resisting frames, a new type of self-centering (SC) beam-column joint equipped with inclined tapered steel plate dampers is introduced in the current study. Firstly, the mechanical property of the SC beam-column joint is theoretically analyzed. Then, four SC joint assembly specimens, with study parameters of dimension and number of the tapered steel plates, are experimentally investigated under incremental cyclic loading tests. The proposed joint exhibits stable flag-shaped hysteresis curves and negligible residual deformation after unloading, which indicates that the joint can dissipate seismic energy well and at the same time have SC capability under earthquakes, thus reducing the cost of post-earthquake restoration. A comprehensive numerical simulation method is proposed to reproduce the hysteretic responses of the new SC beam-column joint. Subsequently, a series of parametric analyses are conducted to investigate the contributing factors affecting the seismic behaviors of the joint in terms of hysteresis, moment bearing capacity, energy dissipation, and SC capability.
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