Online Hybrid Test on Buildings with Stud-Type Damper Made of Slitted Steel Plates Stiffened by Wood Panels

A new-type hysteretic damper composed of a slitted steel plate and buckling-restraining wood panels is proposed. We conduct online hybrid tests of a three story building in which these dampers are installed as stud-type dampers and investigate the validity of design, damping effects, and ultimate behavior of the dampers. The span installing the dampers is tested physically, while the other backup frames are simulated numerically. The dampers are ductile and stable up to large displacements, since local out-of-plane deformations of the steel plates are reduced and distributed around each slit end equally without concentration. The dampers begin to dissipate energy from a small (0.2%) drift level. More than 80% of total energy exerted in the building is dissipated in the dampers for a serviceability level earthquake, and more than 50% for a safety level earthquake.