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Stress-Strain Relationship of Heavyweight Concrete Using Magnetite Aggregate

자철석 중량 콘크리트의 응력-변형률 관계

  • 문주현 (경기대학교 일반대학원 건축공학과) ;
  • 문재성 (경기대학교 일반대학원 건축공학과) ;
  • 양근혁 (경기대학교 플랜트.건축공학과)
  • Published : 2013.08.25

Abstract

To evaluate the stress-strain relationship of heavyweight concrete (HWC) and formulate a reasonable model, 26 mixes were prepared under various parameters including water-to-binder ratio, replacement level with natural aggregate for magnetite aggregates, and the replacement level of fly ash. Based on the current test results and existing data, modulus of elasticity, and strains at the peak stress and at 50% of peak stress in the descending branch were formulated as a function of compressive strength and unit weight of concrete. The factor to determine the slopes of ascending and descending branches of the stress-strain curve was solved by numerical analysis and formulated through the parametric study. Test results demonstrated that the stress-strain behavior of concrete is significantly affected by its unit weight as well as its compressive strength. ACI 349-06 provision unconservatively predicts the modulus of elasticity of HWC, and CEB-FIP and EC2 provisions overestimate the strain at peak stress. Meanwhile, the proposed models are in good agreement with test results, giving a consistency with the trends observed in tests.

Keywords

References

  1. Neal, B. G., The Plastic Methods of Structural Analysis, Third Edition, Taylor and Francis, 1985
  2. Yang, K. H., Sim, J. I., and Thomas, H. -K. Kang, Generalized Equivalent Stress Block Model Considering Varying Concrete Compressive Strength and Unit Weight, ACI Struct ural Journal, Accepted, 2012
  3. 양근혁, 송진규, 이경훈, 알카리활성 슬래그 콘크리트의 응력-변형률 관계, 한국콘크리트학회 논문집, Vol.23, No.6, p.p. 765-772, 2011
  4. Yang, K. H., Mun, J. S., and Lee, H., Workability and Mechanical Properties of Heavyweight Magnetite Concrete, ACI Materials Journal, Accepted, 2013
  5. Van Gysel, A., and Taerwe, L., Analytical Formulation of the Complete Stress-Strain Curve for High Strength Concrete, Materials and Structures, Vol.29, p.p. 529-533, 1996 https://doi.org/10.1007/BF02485952
  6. Hsu, L. S., and Hsu, C. T. T., Complete Stress-Strain Behavior of High-Strength Concrete under Compression, Magazine of Concrete Research, Vol.46, No.169, p.p. 301-312, 1994 https://doi.org/10.1680/macr.1994.46.169.301
  7. Carreira, D. J., and Chu, K. H., Stress-Strain Relationship for Plain Concrete in Compression, ACI Journal, Proceedings, Vol.82, No.6, p.p. 797-804, 1985
  8. Almusallam, T. H., and Alsayed, S. H., Stress-Strain Relationship of Normal, High-Strength and Lightweight Concrete, Magazine of Concrete Research, Vol.47, No.170, p.p. 39-44, 1995 https://doi.org/10.1680/macr.1995.47.170.39
  9. Wee, T. H., Chin, M. S., and Mansur, M. A., Stress-Strain Relationship of High-Strength Concrete in Compression, Journal of Matrials in Civil Engineering, ASCE, Vol.8, No.2, p.p. 70-76, 1996 https://doi.org/10.1061/(ASCE)0899-1561(1996)8:2(70)
  10. ACI Committee 304, Heavyweight Concrete : Measuring, Mixing, Transporting, and Placing (ACI 304.3R-96), American Concrete Institute, 1996
  11. Sturrup, V. R., Properties of High-Density Concrete for Nuclear Shielding, Ontario Hydro Research Quaterly, Vol.29, p.p. 1-8, 1977
  12. Henrie, J. O., Maganetite Iron Ore Concrete for Nuclear Shielding, ACI journal, Vol.26, No.6, p.p. 541-550, 1955
  13. Whitte, L. P., Backstorm, J. E., Properties of Heavy Concrete Made with Baryte Aggregates, ACI Journal, Vol.51, p.p. 65-88, 1954
  14. Katharine M., High Strength, High Density Concrete, ACI Journal(special Publication), Vol.34, p.p. 1587-1596, 1972.
  15. Davis, H. S., Browne, F. L., Witter, H. C., Properties of High-Density Concrete Made with Iron Aggregates, ACI Journal, Vol.27, No.7, p.p. 705-726, 1956
  16. ACI Committee 349, Code Requirements for Nuclear Safety-Related Concrete Structures (ACI 349-06), American Concrete Institute, 2006
  17. Comite Euro-International du Beton (CEB-FIP), Structural Concrete: Textbook on Behavior, Design and Performance, International Federation for Structural Concrete (Fib), 1999.
  18. European Standard EN 1992-1-1:2004, Eurocode 2 : Design of Concrete Structures, British Standard, 2004
  19. ACI Committee 304, Heavyweight Concrete: Measuring, Mixing, Transporting, and Placing (ACI 304.3R-96), Americal Concrete Institute, 1996
  20. 한국표준협회, KS F 2502 굵은골재 및 잔골재의 체가름 시험방법, 한국공업표준협회, 2010
  21. ASTM international, ASTM C 469 Standard Test Method for Static Modulus of Elasticity and Poisson's Ratio of Concrete in Compression, ASTM, 2010