Computers and Concrete

  • 제24권1호
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  • Pages.85-94
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  • 2019
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
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Nominal axial and flexural strengths of high-strength concrete columns

  • 투고 : 2019.03.29
  • 심사 : 2019.06.12
  • 발행 : 2019.07.25
⟨ 이전 논문 다음 논문 ⟩

초록

The ACI building code is allowing for higher strength reinforcement and concrete compressive strengths. The nominal strength of high-strength concrete columns is over predicted by the current ACI 318 rectangular stress block and is increasingly unconservative as higher strength materials are used. Calibration of a rectangular stress block to address this condition leads to increased computational complexity. A triangular stress block, derived from the general shape of the stress-strain curve for high-strength concrete, provides a superior solution. The nominal flexural and axial strengths of 150 high-strength concrete columns tests are calculated using the proposed stress distribution and compared with the predicted strength using various design codes and proposals of other researchers. The proposed triangular stress model provides similar level of accuracy and conservativeness and is easily incorporated into current codes.

키워드

참고문헌

  1. ACI-ASCE Committee 441 (2018), Report on Equivalent Rectangular Concrete Stress Block and Transverse Reinforcement for High-strength Concrete Columns (ACI 441.1R-18), American Concrete Institute, Farmington Hills, MI, USA.
  2. ACI Committee 318 (2014), Building Code Requirements for Structural Concrete (ACI 318-14) and Commentary (318R-14), American Concrete Institute, Farmington Hills, MI, USA.
  3. Al-Kamal, M.K. (2019), "Nominal flexural strength of highstrength concrete beams", Adv. Concrete Constr., 7(1), 1-9. https://doi.org/10.12989/acc.2019.7.1.001.
  4. Azizinamini, A., Kuska, S.S.B., Brungardt, P. and Hatfield, E. (1994), "Seismic behavior of square high-strength concrete columns", ACI Struct. J., 91(3), 336-345.
  5. Bae, S. and Bayrak, O. (2003), "Stress block parameters for highstrength concrete members", ACI Struct. J., 100(5), 626-636.
  6. Bae, S. and Bayrak, O. (2013), "Examination of stress block parameters for high-strength concrete in the context of ACI 318 code", Am. Concrete Inst., Spec. Publ., 293, 1-20.
  7. Basappa, R.H. and Rangan, B.V. (1995), "Strength of high strength concrete columns under eccentric compression", Research Report No. 2/95, School of Civil Engineering, Curtin University of Technology, Perth, Australia.
  8. Bayrak, O. (1997), "Seismic performance of rectilinearly confined high strength concrete columns", PhD Dissertation, University of Toronto, Ontario, Canada.
  9. Brachmann, G. and Empelmann, M. (2018), "Design compressive strength values of concrete under sustained loads", Eds. Hordijk D. and Lukovic M., High Tech Concrete, Where Technology and Engineering Meet, Springer, Cham, Switzerland.
  10. CEB-FIP Model Code (2010), Comite Euro-International du Beton, Thomas Telford.
  11. Chen, D. (1995), "Stress-strain behavior of high strength concrete cylinders", MSc Thesis, New Jersey Institutes of Technology, Newark, New Jersey, USA.
  12. CSA A23.3-04 (2004), Design of Concrete Structures, Canadian Standards Association, Rexdale, Mississauga, ON, Canada.
  13. Danica, G. (2016), "Coefficient ${\alpha}cc$ in design value of concrete compressive strength", J. Facul. Civil Eng., 30, 41-51. https://doi.org/10.14415/zbornikGFS30.04
  14. EN 1992-1-1 (2004), Design of Concrete Structures-Part 1-1: General Rules and Rules for Buildings, European Committee for Standardization, Brussels, Belgium.
  15. Foster, S.J. and Attard, M.M. (1997), "Experimental tests on eccentrically loaded high-strength concrete columns", ACI Struct. J., 94(3), 295-303.
  16. Han, N. (1996), "Time dependent behavior of high strength concrete", PhD Dissertation, Delft University of Technology, Delft, Netherlands.
  17. Ho, J.C.M., Kwan, A.K.H. and Pam, H.J. (2002), "Ultimate concrete strain and equivalent rectangular stress block for design of high-strength concrete beams", Struct. Eng., 80(16), 26-32.
  18. Ibrahim, H.H.H. and MacGregor, J.G. (1996), "Tests of eccentrically loaded high-strength concrete columns", ACI Struct. J., 93(5), 585-594.
  19. Ibrahim, H.H.H. and MacGregor, J.G. (1997), "Modification of the ACI rectangular stress block for high-strength concrete", ACI Struct. J., 94(1), 40-48.
  20. Khadiranaikar, R.B. and Awati M.M. (2012), "Concrete stress distribution factors for high-performance concrete", ASCE J. Struct. Eng., 138(3), 402-415. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000465
  21. Legergon, E. and Paultre, P. (2000), "Behavior of high-strength concrete columns under cyclic flexure and constant axial load", ACI Struct. J., 97(4), 591-601.
  22. Lloyd, N.A. and Rangan, B.V. (1996), "Studies on high-strength concrete columns under eccentric compression", ACI Struct. J., 93(6), 631-638.
  23. Mertol, H.C., Rizkalla, S., Zia, P. and Mirmiran, A. (2008), "Characteristics of compressive stress distribution in highstrength concrete", ACI Struct. J., 105(5), 626-633.
  24. Myers, J.J. (2008), "The use of high strength/high performance concrete in America: A code and application perspective", Proceedings of the 8th International Symposium on Utilization of High-Strength Concrete and High-Performance Concrete, Tokyo, Japan.
  25. Nilson, A.H., Darwin, D. and Dolan, C.W. (2010), Design of Concrete Structures, 14th Edition, McGraw-Hill Companies, Inc., New York, NY, USA.
  26. NZS 3101 (2006), Concrete Structures Standard, Part 1-The Design of Concrete Structures and Part 2-Commentary on the Design of Concrete Structures, Standards Association of New Zealand, Wellington, New Zealand.
  27. Ozbakkaloglu, T. and Saatcioglu, M. (2004), "Rectangular stress block for high-strength concrete", ACI Struct. J., 101(4), 475-483.
  28. Ozden, S. (1992), "Behavior of high-strength concrete under strain gradient", MA Thesis, University of Toronto, Ontario, Canada.
  29. Rusch, H. (1968), "Researches toward a general flexural theory for structural concrete", ACI J., Proc., 57(1), 1-28.
  30. Sheikh, S.A., Shah, D.Y. and Khoury, S.S. (1994), "Confinement of high-strength concrete columns", ACI Struct. J., 91(1), 100-111.
  31. Wahidi, S.A.A. (1995), "Strength and behavior of reinforced concrete columns made from high performance materials", PhD Dissertation, University of Texas at Austin, Austin, Tex., USA.
  32. Yang, K.H., Sim, J.I. and Kang, T.H. (2013), "Generalized equivalent stress block model considering varying concrete compressive strength and unit weight", ACI Struct. J., 110(5), 791-799.