Hysteretic Behavior of Beam-to-Column Connections Equipped with Buckling-Restrained Steel Dampers

Articles in Press

Document Type : Research Article

Authors

1 Department of Civil Engineering- Urmia University of Technology- Urmia- Iran

2 Graduate MSc Student

10.22060/ceej.2025.24011.8246

Abstract

The combination of damage-controlled systems consisting of steel dampers with connections in steel frames reduces the damage to the main structural elements during earthquakes. In this study, two types of buckling-restrained dampers in moment-resisting connections between beams and columns under cyclic loading are numerically investigated. These dampers are the Jointed Arc Plate Damper (JAPD) and the Tube-in-Tube Damper (JTTD). By conducting cyclic analyses up to 4% drift on twelve damper models for various parameters such as different damper-to-beam yield strength ratio of the damper to the beam and the cross-sectional area of the damper, seismic performance characteristics including initial stiffness, moment resistance, ductility, and energy dissipation capacity are compared. According to the analysis results, the JTTD damper performs better than the JAPD damper, with moment resistance and energy dissipation of the JTTD model being approximately 10% and 5% higher than those of the JAPD model, respectively. Increasing the damper-to-beam yield strength ratio from 0.6 to 1.00 results in approximately a 35% increase in moment resistance of the models. In these models, increasing the cross-sectional area of the damper by 40% leads to a roughly 50% increase in connection moment resistance. The theoretical relationships estimate over 85% of the corresponding finite element analysis values, but for estimating the elastic stiffness of the models, the theoretical value should be divided by 3.5. Increasing the damper-to-beam yield strength ratio from 0.6 to 1.00 has no significant effect on energy dissipation, while ductility increases by about 25%.

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Amirkabir Journal of Civil Engineering

Articles in Press, Accepted Manuscript
Available Online from 03 July 2025

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