Journal of the Architectural Institute of Korea (대한건축학회논문집)

Architectural Institute of Korea (대한건축학회)
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Analysis of Shear Friction Strength of Separated Steel Fiber Reinforced Concrete under Direct Shear Test

직접전단 시험을 통한 분리타설된 강섬유 보강 콘크리트의 전단마찰강도 분석

  • Lee, Hye-Won (Dept. of Architectural Engineering, Hanyang University) ;
  • Son, Dong-Hee (Dept. of Architectural Engineering, Hanyang University) ;
  • Bae, Baek-Il (Dept. of Digital Architecture & Urban Engineering, Hanyang Cyber University) ;
  • Choi, Chang-Sik (Dept. of Architectural Engineering, Hanyang University)
  • 이혜원 (한양대 건축공학과) ;
  • 손동희 (한양대 건축공학과) ;
  • 배백일 (한양사이버대 디지털건축도시공학과) ;
  • 최창식 (한양대 건축공학부)
  • Received : 2023.07.31
  • Accepted : 2023.10.04
  • Published : 2023.10.30
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Abstract

When precast concrete elements and cast-in-place concrete are formed separately, they create shear friction at their interface. Ensuring structural integrity is vital, and this involves placing shear friction reinforcement at this interface. Steel fibers are recognized for enhancing shear strength by leveraging the dowel action of shear friction reinforcements, and shear friction capacity can be improved by using steel fibers locally. In this study, 12 push-off tests were conducted to assess how steel fiber reinforced concrete (SFRC) contributes to shear friction strength in direct shear. The experimental findings were also compared with the predicted values from current code provisions. These experiments revealed that the crack width at maximum shear friction strength increased as the volume of steel fibers increased, and the contribution of concrete also increased with higher steel fiber volume. Notably, Eurocode 2 yielded higher contributions compared to AASHTO LRFD. Eurocode 2, which takes into account concrete's tensile strength, provided the most accurate results. Therefore, future studies should consider the influence of concrete when designing for shear friction strength.

Keywords

Acknowledgement

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

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