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Effects of Specimen Depth on Flexural Compressive Strength of Concrete

부재의 깊이가 콘크리트의 휨압축강도에 미치는 영향

  • 이성태 (한국전력기술(주) 책임기술원) ;
  • 김진근 (한국과학기술원 토목공학과) ;
  • 김장호 (세종대학교 토목환경공학과)
  • Published : 2000.10.01

Abstract

Currently, in evaluating a flexural strength of a concrete member, the effect of specimen depth has not been systematically studied, even though its effect on ultimate strength of a section is very important. For all types of loading conditions, the trend is that the strength of a member tends to decrease when the member depth increases. In this study, the influence of specimen depth on flexural compressive strength of concrete member was examined experimentally. A series of C-shaped specimens subjected to axial compressive force and bending moment were tested using three geometrically similar specimens with different length-to depth ratios (h/c = 1, 2 and 4) which have compressive strength of 55 MPa. The results indicate that the flexural compressive strength decreased as the specimen depth increased. A model equation was derived based on regression analyses of the experimental data. Also, the results show that ultimate strain decreases as the specimen depth increases. Finally, a general model equation for the depth effect is proposed.

Keywords

References

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