Existing reinforced concrete buildings with seismically deficient details have premature failure under earthquake loads. The fiber-reinforced polymer column jacket enhances the lateral resisting capacities with additional confining pressures. This paper aims to quantify the retrofit effect varying the confinement and stiffness-related parameters under three earthquake scenarios and establish the retrofit strategy. The retrofit effects were estimated by comparing energy demands between non-retrofitted and retrofitted conditions. The retrofit design parameters are determined considering seismic hazard levels to maximize the retrofit effects. The critical parameters of the retrofit system were determined by the confinement-related parameters at moderate and high seismic levels and the stiffness-related parameters at low seismic levels.

1. 서 론
2. FRP 기둥 재킷 시스템
3. 역량스펙트럼법을 이용한 지진 응답
    3.1 역량스펙트럼법을 이용한 지진응답
    3.2 성능평가 방법론
    3.3 보강 시스템의 주요 매개변수
4. 보강 시스템의 효과
    4.1 구속비(Confinement Ratio, CR)
    4.2 강성비(Stiffness Ratio, SR)
    4.3 보강효과
5. 결 론
감사의 글

• 황희진(경상국립대학교 건축공학과 석사과정) | Hwang Heejin (Student, Department of Architecture Engineering, Gyeongsang National University)
• 김혜원(국립재난안전연구원 지진방재센터 공학박사) | Kim Haewon (Senior Research Officer, National Earthquake Hazards Reduction Center, National Disaster Management Research Institute)
• 오근영(한국건설기술연구원 건축연구본부 전임연구원) | Oh Keunyeong (Research Specialist, Department of Building Research, Korea Institute of Civil Engineering and Building Technology)
• 신지욱(경상국립대학교 건축공학과 조교수 (공학박사)) | Shin Jiuk (Assistant Professor(PhD), Department of Architecture Engineering, Gyeongsang National University) Corresponding author