Journal of the Architectural Institute of Korea (대한건축학회논문집)

Architectural Institute of Korea (대한건축학회)
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A Study on the Shear Strength Characteristics of High Strength Reinforced Concrete Beams According to Beam Size and Shear Reinforcement Spacing Ratio

보의 크기와 전단철근간격비에 따른 고강도 철근콘크리트보의 전단강도 특성 연구

  • 유인근 (금오공과대학교 건축학부) ;
  • 박나정 (금오공과대학교 건축학부) ;
  • 백승민 (금오공과대학교 건축학부) ;
  • 김우석 (금오공과대학교 건축학부) ;
  • 곽윤근 (금오공과대학교 건축학부)
  • Received : 2021.05.31
  • Accepted : 2021.09.13
  • Published : 2021.09.30
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Abstract

This study conducted an experiment on the shear strength of high-strength reinforced concrete beams depending on the effects of shear reinforcement spacing and beam size. Through experiments, experimental values were compared with the theoretical values based on standard equations such as KDS 14 20 22, ACI 318-19, CEB-FIP, and existing proposal equations which are Zsutty, Bazant, and Lee's equations. It will be compared and analyzed to be used as basic data for shear design of reinforced concrete beams with fck = 50 MPa, 𝜌 = 0.025 and the width-to-depth ratio (h/b) were constant, and the beam size (b×d) and shear reinforcement spacing (d/s) were variables. The test specimens were divided into three series, SHR1, SHR2, and SHR3, according to the size of the cross section. As a result of comparing the experimental value and the theoretical value according to the standard equations and the proposed equations, the average value was 1.15 to 1.61 and the standard deviation was 0.16 to 0.20. Among the comparisons between the standard and proposed equations, the Zsutty, Bazant, and Lee's equations predict experimental values relatively well. The mean of the Zsutty's equation was 1.29, the standard deviation was 0.18, the mean of the Bazant's equation was 1.15, the standard deviation was 0.19, the mean of the Lee's equation was 1.17, and the standard deviation was 0.20, respectively.

Keywords

Acknowledgement

이 연구는 2020년도 한국연구재단 연구비 지원에 의한 결과의 일부임(과제번호:NRF-2018R1D1A1B07045066).

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