Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
권호 표지
DOI QR코드

DOI QR Code

Effects of Specimen Length on Flexural Compressive Strength of Concrete

부재의 길이가 콘크리트의 휨압축강도에 미치는 영향

  • 김진근 (한국과학기술원 토몸꽁학과) ;
  • 이성태 (한국과학기술원 토목공학과 박사과정, 한국전력기술(주) 책임연구원) ;
  • 이태규 (우송대학교 건축토목환경공학부)
  • Published : 1999.08.01
Download PDF
⟨ Previous Next ⟩

Abstract

In evaluating the ultimate strength of a section for a reinforced concrete flexural member, the effect of member length is not usually considered, even though the strength tends to decrease with increase of member length. In this paper the influence of specimen length on flexural compressive strength of concrete was evaluated. For this purpose, a series of C-shaped specimens subjected to axial compression and bending moment were tested using four different length-to-depth ratios (from 1,2,3 and 4) of specimens with compressive strength of 590 kgf/$\textrm{cm}^2$. Results indicate that for the region of h/c <3.0 the reduction in flexural compressive strength with increase of length-to-depth ratios was apparent. A model equation was depth of an equivalent rectangular stress block was larger than that by ACI. It was also founded that the effect of specimen length on ultimate strain was negligible. Finally more general model equation is also suggested.

Keywords

References

  1. Proc. Int. Conf. Fracture and Damage Mechanics of Concrete and Rock Fracture Mechanics Concepts Applied to Moment Capacity and Rotational Capacity of Reinforced Beams Hillerborg, A.
  2. Cement and Concrete Research v.19 Identification of Strain-Softening Contitutive Relation from Uniaxial Tests by Series Coupling Model for Localization Bazant, Z.P.
  3. Proc. Int. Workshop, Size Effect in Concrete Stucture, held in Sendai, Japan Size Effect in Tensile and Compressive Quasibrittle Failure Bazant, Z.P.;Mihashi H.(ed.);Okamura, H.(ed.);Bazant, Z.P.(ed.)
  4. 한국콘크리트학회 v.11 no.2 콘크리트의 휨압축강도의 크기효과 김진근;이성태;양은익
  5. ACI Structural Journal Size Effect on Flexural Compressive Strength of Concrete Specimens Kim, J.K.;Yi, S.T.;Yang, E.I.
  6. Journal of ACI v.52 Concrete Stress Distribution in Ultimate Strength Design Hongested, E.;Hanson, N.W.;McHenry, D.
  7. PCA Research and Development Bulltein RD051.01D Stress-Strain Characteristics of High-Strength Concrete Kaar, P.H.;Hanson, N.W.;Capell, H.T.
  8. High-Strength Concrete, SP-87 Structural Bending Properties of Higher Strength Concrete Swartz, S.E.;Nikaeen, A.;Narayan Babu, H.D.;Periyakaruppan, N.;Refai, T.M.E.
  9. ACI Materials Journal v.88 no.3 Size Effect in Brazilian Split-Cylinder Tests: Measurements and Fracture Analysis Bazant, Z.P.;Kazemi, M.T.;Hasegawa, T.;Mazars, J.
  10. Metal. Journal of Engineering Mechanics v.110 no.4 Size Effect in Blunt Fracture: Concrete, Rock Bazant, Z.P.
  11. Fracture Mechanics: Application to Concrete, SP-118 Size Effect in Concrete Structures without Initial Crack Kim, J.K.;Eo, S.H.;Park, H.K.
  12. Magazine of Concrete Research v.42 no.153 Size Effect in Concrete Speiciment with Dissimilar Initial Cracks Kim, J.K.;Eo, S.H.Size
  13. 콘크리트학회지 v.9 no.1 비표준형 실린더 공시체에 대한 압축강도의 크기효과 김진근;어석홍;이성태
  14. ACI Structural Journal v.96 no.1 Size Effect on Compressive Strength of Plain and Spirally Reinforced Concrete Cylinders Kim, J.K.;Yi, S.T.;Park, C.K.;Eo, S.H.
  15. Cement and Concrete Research v.25 no.4 Softening of Concrete in Compression Localization and Size Effects Markeset, G.;Hillerborg, A.
  16. Fracture Mechanics of Concrete Strucutres A Compressive Softening Model for Concrete Markeset, G.;Wittmann F.H.(edited)
  17. J. of Engineering Mechanics v.123 no.1 Effect of Length on Compressive Strain Softning of Concrete Jansen, D.C.;Shah, S.P.
  18. Second Progress Report, Dept. of Structural Engineering Cornell University Structural Properties of Very High Strength Concrete Nilson, A.H.;Slate, F.O.