This study proposes a hybrid system of fiber reinforced polymer (FRP) and ultra high performance concrete (UHPC) to enhance flexural strength of existing reinforced concrete (RC) slabs. The proposed system is designed to be placed at the top surface of the slabs for flexural strengthening of the sections in both positive and negative moment zones. The enhancing mechanisms of the proposed system for both positive and negative moment regions are presented. Moreover, to prevent the compression in FRP of the enhanced sections in positive moment zone at flexural failure, neutral axis of the sections at failure is enforced to be in UHPC overlay. From this condition, a relationship between design parameters of FRP and UHPC is established.

ABSTRACT
 1. 서 론
 2. 보강기법
 3. 사례연구 및 토의
 4. 결론
 참고 문헌

• 김정중(세종대학교 건설환경공학과) | Kim Jung Joong
• 노혁천(세종대학교 건설환경공학과) | Noh Hyuk-Chun