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

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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Shear Strength Evaluation of Prestressed Concrete Beams without Shear Reinforcement

전단철근이 배치되지 않은 프리스트레스트된 콘크리트 보의 전단강도 평가

  • 주현진 (한경대학교 디자인건축융합학부) ;
  • 이득행 (충북대학교 건축공학과) ;
  • 이창준 (충북대학교 건축공학과) ;
  • 이준철 (서원대학교 건축학과) ;
  • 김강수 (서울시립대학교 건축공학과)
  • Received : 2022.01.05
  • Accepted : 2022.04.06
  • Published : 2022.04.30
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Abstract

The dual potential capacity model (DPCM) was extended to be suitable for evaluation of the shear strength of prestressed concrete (PSC) members in the previous study. This paper aims to simplify the DPCM for its better application in practice. To this end, a total of 172 shear test results of PSC members without shear reinforcement were collected from existing studies. The collected shear test results include PSC members with various section types and prestressing methods. It appeared that the simplified model could provide a good level of estimation accuracy of shear strength of PSC members, and it was comparable with that provided from the original DPCM.

이전 연구에서는 전단철근이 배치되지 프리스트레스트 콘크리트 (Prestressed Concrete, PSC) 부재의 전단강도를 평가하기 위하여 이중잠재강도모델 (Dual potential capacity model, DPCM)이 개발되었다. 그러나 기존의 DPCM은 PSC 부재의 전단강도를 산정하기 위하여 복잡한 반복계산이 요구되며, 이 같은 이유로 DPCM의 실무적용이 어려운 실정이다. 이 연구의 목표는 기존의 DPCM을 현행 건축구조설계실무에서 적용할 수 있도록 단순화하는 것이다. 이를 위해 기존 연구로 부터 총 172개의 PSC 부재의 전단실험 결과를 수집하였다. 수집된 전단실험 결과들은 다양한 단면형태와 프레스트레싱 특성을 갖는 PSC 부재들을 포함한다. 이 연구를 제시하는 단순화된 DPCM은 상당한 정확도로 PSC 부재들의 전단강도를 평가할 수 있는 것으로 나타났다.

Keywords

Acknowledgement

이 논문은 충북대학교 국립대학육성사업(2021)지원을 받아 작성되었음 (과제제목: 기계학습모델을 활용한 콘크리트 구조물의 전단에 의한 붕괴메커니즘 규명).

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