2nd Croatian Conference on Earthquake Engineering 2CroCEE

The purpose of this study investigates the seismic performance of a new type of yield metal dampers. Drilled plates are used in these metal dampers. These plates use holes with different diameters. Various drilling arrangement have also used to evaluate and improve the seismic performance of these types of dampers. For this study used a reference sample and 15 proposed models. The overall numerical results show that the proposed metal dampers have similar hysteretic curves. According to the hysteresis curves of drilled plate metallic damper (DPMD) under in-plane seismic loading; obtained mechanical parameters such as ductility ratio, initial stiffness, effective stiffness, total dissipated energy, dissipated energy in the last cycle, elastic strain energy, equivalent viscous damping (EVD) and equivalent plastic strain (EPS). Also, a formula is proposed to estimate the EVD value based on the ductility ratio of the proposed samples. The analytical results showed that the amount of stiffness, ductility ratio, and equivalent viscous damping depends on the location and diameter of the holes. Also, the concentration of plastic strain between the holes increases the ductility ratio and EVD value of these types of dampers.