experimental study on the hysteretic behavior of replaceable mild steel dissipaters under cyclic tensile–compression loading

The energy-dissipation mechanism of an external replaceable mild steel energy dissipater suitable for self-centering hybrid connections under repeated tensile and compressive loads was investigated. the effects of the slenderness ratio and energy consumption section diameter on the bearing ability, energy-dissipation capacity, displacement ductility and stiffness degradation of the dissipater were also evaluated. the research results showed that when the hysteretic curve of the energy-dissipation device is full, the slenderness ratio has a great influence on the overall performance of the energy-dissipation device. the ratio of the end diameter of the dissipater to the weakening section should not be less than 4/3. the energy-consuming devices have good-displacement ductility, up to 4.97. simplified models of the dissipater-force mechanism were established. two stress stages of the replaceable mild steel energy dissipater under cyclic tension–compression loading were defined. a parametric model of the hysteresis curve under cyclic tension–compression loading was established via theoretical calculations and experiments. © the author(s), under exclusive licence to the iran university of science and technology 2024.