Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Experimental Study on Shear Retrofitting of Concrete Columns Using Iron-Based Shape Memory Alloy

철계 형상기억합금을 이용한 콘크리트 기둥의 전단보강 실험연구

  • Jung, Donghuk (School of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Jeong, Saebyeok (Department of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Choi, Jae-Hee (Department of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Kim, Geunoh (Department of Civil, Environmental and Architectural Engineering, Korea University)
  • 정동혁 (고려대학교 건축사회환경공학부) ;
  • 정새벽 (고려대학교 건축사회환경공학과) ;
  • 최재희 (고려대학교 건축사회환경공학과) ;
  • 김근오 (고려대학교 건축사회환경공학과)
  • Received : 2023.11.08
  • Accepted : 2023.11.30
  • Published : 2024.01.01
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Abstract

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.

Keywords

Acknowledgement

본 논문은 고려대학교 특별연구비에 의하여 수행되었음.

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