The current study investigates the seismic performance of shear-dominant RC columns retrofitted with iron-based shape memory alloy (Fe SMA). Three RC columns with insufficient transverse reinforcement were designed and fabricated for lateral cyclic loading tests. Before testing, two specimens were externally confined with carbon fiber-reinforced polymer (CFRP) sheets and self-prestressed Fe SMA strips. The test results showed that both CFRP and Fe SMA performed well in preventing severe shear failure exhibited by the unretrofitted control specimen. Furthermore, the two retrofitted specimens showed ductile flexural responses up to the drift ratios of ±8%. In terms of damage control, however, the Fe SMA confinement was superior to CFRP confinement in that the spalling of concrete was much less and that the rupture of confinement did not occur.

1. 서 론
2. 철계 형상기억합금의 재료거동
    2.1 형상기억효과
    2.2 프리스트레싱 실험
3. 콘크리트 기둥의 반복가력실험
    3.1 실험계획 및 전단보강
    3.2 실험결과
4. 결 론

• 정동혁(고려대학교 건축사회환경공학부 조교수) | Jung, Donghuk (Assistant Professor, School of Civil, Environmental and Architectural Engineering, Korea University) Corresponding author
• 정새벽(고려대학교 건축사회환경공학과 석사과정) | Jeong, Saebyeok (Master’s Student, Department of Civil, Environmental and Architectural Engineering, Korea University)
• 최재희(고려대학교 건축사회환경공학과 석사과정) | Choi, Jae-Hee (Master’s Student, Department of Civil, Environmental and Architectural Engineering, Korea University)
• 김근오(고려대학교 건축사회환경공학과 석사과정) | Kim, Geunoh (Master’s Student, Department of Civil, Environmental and Architectural Engineering, Korea University)