Computers and Concrete

  • 제8권1호
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  • Pages.1-22
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  • 2011
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

A numerical tension-stiffening model for ultra high strength fiber-reinforced concrete beams

  • Na, Chaekuk (Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology) ;
  • Kwak, Hyo-Gyoung (Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology)
  • 투고 : 2009.07.30
  • 심사 : 2009.12.03
  • 발행 : 2011.02.25
⟨ 이전 논문 다음 논문 ⟩

초록

A numerical model that can simulate the nonlinear behavior of ultra high strength fiber-reinforced concrete (UHSFRC) structures subject to monotonic loadings is introduced. Since engineering material properties of UHSFRC are remarkably different from those of normal strength concrete and engineered cementitious composite, classification of the mechanical characteristics related to the biaxial behavior of UHSFRC, from the designation of the basic material properties such as the uniaxial stress-strain relationship of UHSFRC to consideration of the bond stress-slip between the reinforcement and surrounding concrete with fiber, is conducted in this paper in order to make possible accurate simulation of the cracking behavior in UHSFRC structures. Based on the concept of the equivalent uniaxial strain, constitutive relationships of UHSFRC are presented in the axes of orthotropy which coincide with the principal axes of the total strain and rotate according to the loading history. This paper introduces a criterion to simulate the tension-stiffening effect on the basis of the force equilibriums, compatibility conditions, and bond stress-slip relationship in an idealized axial member and its efficiency is validated by comparison with available experimental data. Finally, the applicability of the proposed numerical model is established through correlation studies between analytical and experimental results for idealized UHSFRC beams.

키워드

참고문헌

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피인용 문헌

  1. Ductile behavior of high performance fiber reinforced cementitious composite (HPFRCC) frames vol.115, 2016, https://doi.org/10.1016/j.conbuildmat.2016.04.078
  2. Numerical and statistical analysis about displacements in reinforced concrete beams using damage mechanics vol.10, pp.3, 2012, https://doi.org/10.12989/cac.2012.10.3.307
  3. Prediction of deflection of high strength steel fiber reinforced concrete beams and columns vol.9, pp.2, 2012, https://doi.org/10.12989/cac.2012.9.2.133
  4. Increasing the flexural capacity of RC beams using partially HPFRCC layers vol.16, pp.4, 2015, https://doi.org/10.12989/cac.2015.16.4.545
  5. Computational and Simulation Analysis of Pull-Out Fiber Reinforced Concrete vol.2014, 2014, https://doi.org/10.1155/2014/576052