Performance Improvement of Innovative Shear Damper Using Diagonal Stiffeners for Concentrically Braced Frame Systems

Although concentrically braced frame (CBF) systems enjoy high elastic stiffness and lateral strength, they show a low seismic energy absorption capacity. This dilemma is due to the buckling of CBFs’ diagonal members under compressive loading. To overcome shortcoming, researchers have proposed use dampers improve behavior CBF systems. Among dampers, metallic shear damper most popular thanks its suitable performance as well economic profit. The main shortcoming stiffness. Therefore, in this article, an innovative approach dampers. Subsequently, strengthening with X-stiffeners proposed, evaluated numerically parametrically. Results indicate that by adding X-stiffeners, ultimate strength are enhanced considerably. However, properties stiffeners do not impact nonlinear zone. Moreover, affected parameters such ratio web plate flange plates, ρ factor. consider predict damper, required equations which demonstrate good agreement finite element results.