New Metallic Damper with Multiphase Behavior for Seismic Protection of Structures

This paper proposes a new metallic damper based on the plastic deformation of mild steel. It is intended to function as an energy dissipation device in structures subjected severe or extreme earthquakes. The possesses gap mechanism that prevents high-cycle fatigue damage under wind loads. Furthermore, large deformations, presents reserve strength and capacity can be mobilized event ground motions. An extensive experimental investigation was conducted, including static cyclic tests isolated from structure, dynamic shake-table dampers installed reinforced concrete structure. Four phases are distinguished response. Based results tests, hysteretic model for predicting force-displacement curve arbitrary loadings presented. accurately captures increment stiffness very deformations. ultimate found differ depending phase which it fails, equations proposed its prediction. concluded has stable response, behavior, failure highly predictable with relatively simple numerical model.