Unlike the CFT retrofit method, The EPFT retrofit method, which fills the steel tube with engineering plastic, does not require a separate concrete forming work and is a lightweight seismic Retrofit Method. In this study, an prototype model of the EPFT was proposed, and to analyze the seismic performance, an independent specimens and a reinforced concrete column were fabricated to conduct a seismic performance test. As a result of loading test of the independent specimens, the strength was increased compared to the steel tube column without internal filling, and the ductility ratio did not significantly increase due to the falling off of the weld. As a result of loading test of the concrete reinforcement specimen, the strength, ductility ratio, and energy dissipation were increased, and the number of cracks by loading step decreased compared to the non-reinforced specimen.

Abstract
1. 서론
2. EPFT 강관기둥 보강공법
    2.1 .엔지니어링 플라스틱
    2.2 EPFT 보강공법
3. EPFT 강관기둥 성능실험
    3.1 EPFT 강관기둥 실험계획
    3.2 실험결과
4. 콘크리트 보강체 성능실험
    4.1 기둥 보강용 EPFT 실험계획
    4.2 실험결과
5. 결론
감사의 글
References

• 김유성(㈜플러스구조 박사수료) | Kim Yu-Seong (Plus Structural Engineers & Associates Manager)
• 이준호(서일대학교. 건축공학과 조교수, 공학박사) | Lee Joon-Ho (School of Architecture, Seoil University)
• 김기철(서일대학교 건축공학과 교수) | Kim Gee-Chul (School of Architecture, Seoil University) Corresponding author