Journal of the Korea institute for structural maintenance and inspection (한국구조물진단유지관리공학회 논문집)

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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Evaluation of Shear Performance of RC Web Opening Beams According to the Shape of Web Opening Reinforcement

유공보강근의 형상에 따른 철근콘크리트 유공 보의 전단성능평가

  • 김민준 (LH토지주택연구원) ;
  • 이범식 (LH토지주택연구원) ;
  • 김길희 (공주대학교 건축공학과 &도시융합시스템공학과)
  • Received : 2021.08.04
  • Accepted : 2021.08.27
  • Published : 2021.10.30
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Abstract

In this study, a shear experiment was conducted to evaluate the structural performance of RC members according to the shape of web opening reinforcement. For a total of 4 RC members specimens, the main variables were with or without web openings, with or without web opening reinforcement, and shape of web opening reinforcement, respectively. In this study, a spiral web opening reinforcement with a mixture of square and octagonal shapes was proposed and compared with the existing band type. As a result of the experiment, the specimen with the proposed web opening reinforcement showed that the shear capacity and the energy dissipation capacity increased compared to other specimens. It was confirmed that the web opening reinforcement proposed in this study had a positive effect on the shear performance and crack control of RC members with web openings.

이 연구에서는 유공보강근의 형상에 따른 RC 유공보의 구조성능을 평가하기 위하여 전단실험을 수행하였다. 실험체는 총 4체이며, 주요변수는 유공의 유무, 유공 보강 유무, 유공 보강근의 형상이다. 이 연구에서는 사각형과 팔각형이 혼합된 나선형의 유공보강근을 개발하였으며, 이를 기존 Band형과 비교하였다. 실험결과, 제안 유공 보강근으로 유공을 보강한 실험체는 타 실험체에 비하여 최대 전단력과 최대 전단력 이후 에너지소산면적이 증가하는 것으로 나타났다. 따라서 제안 유공 보강근은 유공 주위의 균열제어와 함께 전단성능의 향상에 효과적임을 확인하였다.

Keywords

Acknowledgement

이 연구는 한국토지주택공사(토지주택연구원)에서 지원한 "LH RC 유공보 보강상세 개발(2017)" 결과의 일부입니다.

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