The double frame system is composed of existing structure, external retrofit frame and hysteretic steel dampers installed between former two components. The DFS retrofit system dissipates the energy by plastic deformation of steel damper caused by relative displacement due to the differences in stiffness, weight, and eigenperiod of each components. The dynamic test with shaking table was performed to verify the seismic performance of the proposed DFS system

• 오상훈(부산대학교 건축공학과 교수, 공학박사) | Oh, Sang Hoon
• 최광용(부산대학교 건축공학과 박사과정) | Choi, Kwang Yong
• 유홍식(포항산업과학연구원, 선임연구원, 공학박사) | Ryu, Hong Sik