Reinforced concrete (RC) piloti buildings are vulnerable in the event of earthquake because the stiffness in the 1st story columns is weak to compare with the members in upper stories. In this study, seismic performances of RC piloti structures were evaluated considering with different types of floor plane layouts according to core eccentricity. With four types of floor plane layouts, five stories plioti structures were evaluated by two approaches, a nonlinear pushover analysis and a nonlinear time-history analysis. In order to improve seismic performances by satisfying the collapse prevention (CP) level, two ductile reinforcing methods by carbon fiber sheets and steel jackets were applied. Due to eccentricities in stiffness and mass with directions of plane and vertical stories, piloti structures were greatly influenced by higher order modes, so the seismic performances by the time-history analysis were significantly different from by the static pushover analysis.

Abstract
1. 서론
2. 평면배치 및 구조
3. 내진성능평가
    3.1 비선형 정적해석
    3.2 비선형 동적해석
4. 필로티 보강 및 내진성능평가
    4.1 보강공법 선정
    4.2 탄소섬유시트 보강의 내진성능평가
    4.3 강판보강의 내진성능평가
5. 결론
감사의 글
References

• 조창근(조선대학교 건축공학과 교수, 공학박사) | Cho Chang-Geun (Department of Architectural Engineering, Chosun University) Corresponding author
• 박승민(㈜도화구조 대리, 공학사) | Park Seung-Min
• 임현진(조선대학교 건축공학과 Postdoc, 공학박사) | Lim Hyeon-Jin
• 김건우(㈜엠에스건설기술 대표이사, 공학박사) | Kim Geon-Woo