Experimental and Numerical Study on an Innovative Trapezoidal-Shaped Damper to Improve the Behavior of CBF Braces

Among the existing passive energy dampers, I-shaped shear dampers had shown suitable performance in experimental and numerical studies. Although they improve dissipating ductility of concentrically braced frames (CBFs), reduce stiffness ultimate strength system. Three approaches are generally used to overcome problem, including (a) increasing thinness plates, (b) number (c) using more bays. The mentioned increase construction costs. Accordingly, this shortcoming, paper, an innovative damper with a trapezoidal shape is proposed investigated experimentally numerically. results indicated that when same material for damper, has greater strength, elastic stiffness, capacity. Additionally, flange plates effective behavior than damper. Moreover, required equations were design