Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
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Hysteretic Behavior Evaluation of a RC Coupling Beam using a Steel Fiber and Diagonal Reinforcement

강섬유와 묶음철근 보강을 통한 고성능 연결보의 이력거동 평가

  • Oh, Hae Cheol (Department of Architectural Engineering, Sejong University) ;
  • Lee, Kihak (Department of Architectural Engineering, Sejong University) ;
  • Han, Sang Whan (Department of Architectural Engineering, Hanyang University) ;
  • Shin, Myoungsu (School of Urban and Environmental Engineering, UNIST) ;
  • Jo, Yeong Wook (Samsung C&T Structural ENG)
  • 오해철 (세종대학교 건축공학과) ;
  • 이기학 (세종대학교 건축공학과) ;
  • 한상환 (한양대학교 건축공학부) ;
  • 신명수 (울산과학기술대학교 도시환경공학부) ;
  • 조영욱 (삼성물산 건설부문 주택기술부)
  • Received : 2015.01.26
  • Accepted : 2015.03.20
  • Published : 2015.06.30
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Abstract

In this paper, a bundled diagonal reinforcement using high performance steel fiber was proposed to enhance the construct ability and seismic performance. Experiments of coupling beam was composed of four specimens and the hysteretic behavior evaluated for reverse cyclic loading to specimens using high performance steel fiber. The main variables of the experiment is a amount of stirrup and bundled reinforcement, depending on whether the mix of steel fiber. Specimen which criteria was applied 100% of stirrup and bundled diagonal reinforcement of ACI318 criteria. With this, by appling same diagonal reinforcement, two specimens were created by adjusting stirrup of 75%, 50%. So, a total of four specimens were produced. When coupling beam was placed concrete, this experiment was mixed in a content of steel fiber 1%. All the specimens were produced by aspect ratio 3.5(l/h=1050/300) to a half-scale. In this result, two specimens as reduced to stirrup of 75%, 50% was no significant difference in the strength, stiffness and energy dissipation capacity, respectively compared to the stirrup of 100%.

본 논문은 시공성과 내진성능을 증대하기 위해 고성능 강섬유를 혼합한 묶음대각철근 연결보를 제시한다. 연결보의 실험은 4개의 실험체로 구성하고 고성능 강섬유를 혼합한 실험체에 반복하중을 가하여 이력거동을 비교 평가하였다. 실험의 주요 변수는 강섬유의 혼합에 따라 대각철근의 묶음 여부와 스터럽의 철근량이다. 기준이 되는 실험체는 묶음대각철근에 ACI318에서 요구하는 스터럽의 철근량을 100% 적용하였다. 이와 함께, 동일한 묶음대각철근을 적용한 상태에서 스터럽의 철근량을 75%와 50%로 조절하여 두 실험체를 추가적으로 만들고 일반대각철근을 고려, 총 4개의 실험체가 제작되었다. 이번 실험에서 연결보의 콘크리트 타설시 고성능 강섬유를 함유율 1%로 혼합하였다. 모든 실험체는 1/2스케일로 형상비 3.5(l/h=1050/300)으로 이루어졌다. 본 실험결과에서 강섬유를 1% 혼입한 고성능 시멘트를 적용한 연결보는 스터럽 철근양을 75%, 50% 줄인 것과 기준실험체로 적용된 스터럽 철근양 100%의 강도 및 강성, 에너지소산능력에서 큰 차이를 보이지 않았다.

Keywords

References

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