Journal of the Architectural Institute of Korea (대한건축학회논문집)

Architectural Institute of Korea (대한건축학회)
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Crack Behavior and Tension-stiffening in Ultra-High-Performance Concrete: Influence of Cover Thickness and Steel Fiber Volume Fraction

피복두께와 강섬유 혼입률에 따른 초고성능 콘크리트의 균열거동과 인장증강효과

  • Zhu, Zhao-Lin (Dept. of Architectural Engineering, Hanyang University) ;
  • Lee, Moon-Seok (Dept. of Architectural Engineering, Hanyang University) ;
  • Son, Dong-Hee (Dept. of Architectural Engineering, Hanyang University) ;
  • Choi, Chang-Sik (Dept. of Architectural Engineering, Hanyang University) ;
  • Choi, Hyun-Ki (Dept. of Fire and Disaster Prevention Engineering, KyungNam University) ;
  • Bae, Baek-Il (Dept. of Digital Architectural and Urban Engineering, Hanyang Cyber University)
  • 주조린 (한양대학교 대학원 건축공학과) ;
  • 이문석 (한양대학교 대학원 건축공학과) ;
  • 손동희 (한양대학교 대학원 건축공학과) ;
  • 최창식 (한양대학교 건축공학부) ;
  • 최현기 (경남대학교 소방방재공학과 ) ;
  • 배백일 (한양사이버대학교 디지털건축도시공학과)
  • Received : 2023.09.01
  • Accepted : 2023.10.16
  • Published : 2024.01.30
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Abstract

This study involved conducting material tests on ultra-high-performance concrete through direct tensile tests. The key variables examined were the volume fraction of steel fiber and the cover thickness. This analysis focused on load-strain relationships, concrete tensile strength, average crack spacing, and maximum crack width. The results reveal that as the volume fraction of steel fiber increases and the cover thickness becomes greater, the concrete's ability to withstand tensile forces significantly improves, resulting in a more robust tension-stiffening effect. Furthermore, the crack behavior during the crack formation stage and stabilized cracking stage indicates improved crack control performance. After the initial crack formation stage, the concrete appears to no longer control additional tensile forces and cracks, with the primary responsibility for crack control shifting to the steel fibers. This transition enhances the tension-stiffening effect by bridging actions of the steel fibers after the initial crack formation stage.

Keywords

Acknowledgement

이 논문은 2023년도 정부(과학기술정보통신부) 연구비 지원에 의한 결과의 일부임. (과제번호: NRF-2022R1A2C3008940, RS-2023-00207763)

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