In this paper, wooden frames with knee brace dampers are designed, and their performance is demonstrated. Lateral dynamic loading tests are conducted in order to examine their dynamic properties. Knee brace system can add stiffness and damping to wooden house without closing its opening, which is a great advantage to reduce torsional response of structure. Simplified modeling method for passively controlled frame is also proposed, and it is based on the characteristics of the frame in two states ; without damper and with rigid damper. Dynamic property, maximum response and member's force and deformation can be predicted.
