This study proposed simplified design procedure of friction damper for enhancing structural seismic performance. Friction damper has a nonlinear characteristic as performing stick and slip motion. So that reason, design of friction damper is difficult. For easy design of damper, first, equivalent damping ratio of the friction damper is derived. Second, design procedure is proposed by the equivalent damping ratio. Finally, seismic performance of structure installed with the friction damper is verified by five earthquake data.

• 성지영(국립재난안전연구원 연구원) | Seong Ji-young
• 박병철(국립재난안전연구원 시설연구관, 공학박사) | Park Byung-cheol
• 박기종(국립재난안전연구원 연구원) | Park Ki-jong
• 진영지(국립재난안전연구원 시설연구사, 공학박사) | Jin Youngji