Proceedings of the Korea Concrete Institute Conference (한국콘크리트학회:학술대회논문집)

Korea Concrete Institute (한국콘크리트학회)
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Shear Capacity of Higth-Strength Concrete Beams With a Shear Span-Depth Ratio Between 1.5 and 2.5

전단-스팬비가 작은 고강도철근콘크리트 보의 전단성능

  • 문정일 (한양대 대학원 건축공학과) ;
  • 안종문 (한양대 대학원 건축공학과석사과정) ;
  • 김대근 (한양대 대학원 건축공학과) ;
  • 이광수 (한양대 대학원 건축공학과) ;
  • 이승훈 ((주)삼성종합건설 기술연구소 연구원) ;
  • 오정근 ((주) 삼성종합건설 기술연구소 연구원) ;
  • 장일영 (금오공대 토목공학과) ;
  • 신성우 (한양대 건축과)
  • Published : 1992.10.01
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Abstract

This paper is an experimental study on shear capacity of the high strength R/C beams with a shear span-depth ratio between 1.5 and 2.5. a total of 15 beams was tested to determine diagonal cracking and ultimate shear strength. The major variables are shear span-depth ratio (a/d=1.5, 2.0. 2.5) , vertical shear reinforcements ratio(Vs = 0 , 25, 50, 75, 100% ( Vs = Pv/Pv(ACI)), and concrete compressive strength (f'c= 747㎏/㎠). Test results indicate that ACI 318-89 Eq(11-31) generally underestimates shear strength carried by vertical shear reinforcements, and the mode of failure may change from shear tension to shear compression for the beams having higher Vs than 75%, thus the effectiveness of r-fy on ultimate shear strength (vu) decreased.

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