Finite-element analysis on beam–column joints with replaceable energy-dissipation plates

This paper presents a comprehensive analysis of a newly developed dog-bone flange weakened beam–column joint, specifically designed for high-rise construction to enhance seismic resistance and facilitate post-disaster recovery. The joint incorporates replaceable energy-dissipation components and vertical slits, and its design and performance are evaluated through Abaqus simulations. The study focuses on critical aspects such as force transmission, failure modes and energy dissipation under low-cycle loading conditions. Comparative analysis with and without vertical slits reveals that the proposed joint exhibits superior performance, with an enhancement of 19.7% in the equivalent viscous damping coefficient. In alignment with the BS EN 1993-1-8-2005 code, the joint is classified as semi-rigid. Detailed parameter analysis suggests the suitability of LY160 and Q235 steel plates with vertical slits for design applications, recommending a steel plate thickness ranging from 0.25 to 0.50 times the thickness of the beam flange. Moreover, a full-length configuration of vertical slits is advocated. The energy-dissipation plate’s void ratio is recommended to be within 5.2–7.8%, and the aspect ratio of the slits should fall between 31.5 and 42.