Abstract
The Adhered Steel Brace is one effective retrofitting method of the earthquake-resistance strengthening work that can be done with little noise and little vibration. In this method, the steel frame with brace is bonded to the existing columns and beams by epoxy resin. The work also can be done in a shorter period of time. The seismic behavior of the adhered steel brace with middle or one-side doorway was investigated. The five specimens were tested under constant compressive loads and repeated lateral forces. The main parameters are the stories, adhesion area and width of flat-plate under opening for doorway. The strength of beam over the doorway is very important to estimate the ultimate strength. In case of one-side doorway, the failure mode is different from that in the direction of lateral force. The ultimate lateral strength and ductility are discussed
