Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
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Size Effect of Concrete Compressive Strength Considering Dried Unit Weight of Concrete

콘크리트의 기건단위질량을 고려한 콘크리트 압축강도의 크기효과

  • Sim, Jae-Il (R&D Team, Haepyeongseon Co., Ltd.) ;
  • Yang, Keun-Hyeok (Department of Plant.Architectural Engineering, Kyonggi University) ;
  • Yi, Seong-Tae (Department of Civil & Environmental Engineering, Inha Technical College)
  • 심재일 (해평선(주) R&D팀) ;
  • 양근혁 (경기대학교 플랜트.건축공학과) ;
  • 이성태 (인하공업전문대학 토목환경과)
  • Received : 2014.10.20
  • Accepted : 2014.12.12
  • Published : 2015.04.30
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Abstract

Since the size effect law announced currently has been based on the normal weight concrete, for light weight concrete having different fracture characteristics, its application is questionable. Accordingly, in this study, a model equation to predict the effect of dried unit weight of the concrete on size effect of its compressive strength was developed and a database using existing research results was created. After determining the experimental constants of prediction models of Ba${\check{z}}$ant based on nonlinear fracture mechanics, Kim and Eo, and this study using the database, their results are mutually compared. Finally, it was found that the prediction model of this study considered dried unit weight of concrete predicted well the test results for light weight concrete than that of the models of Ba${\check{z}}$ant and Kim and Eo.

현재까지 발표된 크기효과법칙은 보통중량 콘크리트에 기반하고 있어 파괴특성이 다른 경량골재 콘크리트에서는 그 활용성이 의문시되고 있다. 따라서 이 연구에서는 콘크리트의 기건단위질량이 압축강도의 크기효과에 미치는 영향을 예측할 수 있는 모델을 개발하고 기존 연구결과들을 모아 데이터베이스화하였다. 그리고 비선형 파괴역학에 근거한 Ba${\check{z}}$ant와 Kim and Eo의 예측모델 및 이 연구에서 제안한 식에 대한 실험상수들을 결정한 후, 상호 비교 분석하였다. 그 결과, 콘크리트의 기건단위질량을 고려한 본 연구의 예측모델이 Ba${\check{z}}$ant와 Kim and Eo의 예측모델보다 경량골재 콘크리트에 대한 실험결과를 더 잘 예측하고 있음을 알 수 있었다.

Keywords

References

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