Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
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A Study on the Shear Behavior of Recycled Aggregate Reinforced Concrete Beams without Stirrups

전단보강이 없는 순환골재 철근콘크리트 보의 전단거동에 관한 연구

  • Lee, Jung-Hoon (Dept. of Architectural Engineering, Kumoh National Institute of Technology) ;
  • Kim, Woo-Suk (Dept. of Architecture and Architectural Engineering, Seoul National University) ;
  • Baek, Seung-Min (Dept. of Architectural Engineering, Kumoh National Institute of Technology) ;
  • Kang, Thomas H.K. (Dept. of Architecture and Architectural Engineering, Seoul National University) ;
  • Kwak, Yoon-Keun (Dept. of Architectural Engineering, Kumoh National Institute of Technology)
  • Received : 2012.10.29
  • Accepted : 2013.06.04
  • Published : 2013.08.31
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Abstract

Little investigations have been carried out to study the shear behaviors of RC beams with recycled aggregates. So, this experiment investigates the shear performance and suggests the possible application of Recycled Concrete Aggregate (RCA) for building structures. In general, shear strength of reinforced concrete beam without stirrups is dependent on the compressive strength of concrete, the longitudinal steel ratio, and the shear span-to-depth ratio. In this study, total 28 recycled aggregate concrete beams without shear reinforcement were tested by two-point load and all beams were singly reinforced. The variables studied in this investigation are shear span-to-depth ratios (a/d=2, 3 and 4), RCA replacement ratios (0, 15, 30 and 50%) and longitudinal steel ratios (0.80, 1.27 and 1.84%). The designed concrete compressive strength with a 30 MPa is used. This research will play an important role toward the establishment of the structural design standard for RCA concrete.

몇몇 연구자들에 의해 순환골재를 사용한 철근콘크리트 보의 전단거동에 대한 연구가 수행되었다. 이 실험에서는 건물 구조체에 순환골재 콘크리트의 적용 가능성과 전단 성능에 대하여 조사하였다. 일반적으로, 전단보강이 없는 철근콘크리트 보의 전단강도는 콘크리트의 압축강도, 인장철근비 및 전단경간비의 영향을 받는다. 이 연구에서는, 전단보강이 없는 28개의 순환골재 철근콘크리트 보를 2점 가력하여 실험하였다. 순환골재 치환율(0, 15, 30, 50%), 전단경간비(a/d=2, 3, 4) 및 인장철근비(${\rho}$=0.80, 1.27, 1.84%)를 변수로 하였고, 순환골재 치환율 50%를 기준으로 압축강도 30 MPa을 목표로 배합하였다. 이 연구가 순환 골재 철근콘크리트 보의 전단설계식 제정에 기초적 자료로써 중요한 역할을 할 수 있을 것으로 생각된다.

Keywords

References

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