Parametric studies on the seismic behavior of yielding D-shaped dampers in a novel configuration

This study investigated a D-shaped yielding damper (DSYD) in a new configuration. In the proposed model, the DSYD is angled relative to the direction of the force, which alters its behavior. Parametric studies were conducted to assess the impact of the damper's dimensions and its angle in the model. All analyses were performed based on a validated model. After conducting cyclic analyses and extracting hysteresis curves, seismic parameters were derived from these results. The seismic parameters included effective and elastic stiffness, yield and maximum strength, energy dissipation, and equivalent damping coefficient (EDC). To facilitate quicker estimation of these results, approximate equations based on the curve fitting method were proposed, which provided results closely matching the numerical outcomes. Finally, the most influential variables on the results were identified. The numerical study results demonstrated that an increase in the damper angle leads to improved outcomes for a damper with a rectangular cross-section. In contrast, decreasing the damper angle produced better results for a damper with a square cross-section. Increasing the thickness and reducing the radius of the damper improved all of its seismic parameters. The damper angle had the most significant impact on EDC, followed by yield force and initial stiffness.