| Abstrakt: |
Aiming at the situation that some dampers cannot give full play to the energy dissipation effect during small earthquakes, this paper proposes a displacement-amplified mild steel bar joint damper. This type of damper can amplify the small displacement of beam-column nodes through the lever principle, so that the damper can dissipate energy more effectively. Firstly, the amplification principle and construction characteristics are introduced, and ABAQUS finite element software is used to establish damper models with and without displacement amplification. Based on the graphical comparisons of the hysteresis curve and the skeleton curve, it can be concluded that the energy consumption of the proposed displacement-amplified mild steel bar joint is three times more effective than the ordinary damper. Finally, a parameter analysis is carried out with the results shown that (i) the energy dissipation effect of the damper increases with the diameter and the number of mild steel bars in the damper, (ii) the hysteresis curve of the damper is fuller and the energy dissipation effect is better with the use of mild steel energy dissipation original, and (iii) in a certain range, with the increase in the amplification of the damper, the energy dissipation original of the damper is more effective in energy dissipation, so as to make the damper reach the optimal energy dissipation effect. |
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