Computers and Concrete

  • 제4권2호
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  • Pages.101-117
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  • 2007
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

3D material model for nonlinear basic creep of concrete

  • 투고 : 2005.09.01
  • 심사 : 2007.02.05
  • 발행 : 2007.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

A new model predicting the nonlinear basic creep behaviour of concrete structures subjected to high multi-axial stresses is proposed. It combines a model based on the thermodynamic framework of the elasto-plastic continuum damage theory for time-independent material behaviour and a rheological model describing phenomenologically the long-term delayed deformation. Strength increase due to ageing is regarded. The general 3D solution for the creep theory is derived from a rate-type form of the uniaxial formulation by the assumption of associated creep flow and a theorem of energy equivalence. The model is able to reproduce linear primary creep as well as secondary and tertiary creep stages under high compressive stresses. For concrete in tension a simple viscoelastic formulation is applied. The material law is then incorporated into a finite element solution procedure for analysis of reinforced concrete structures. Numerical examples of uniaxial creep tests and concrete members show excellent agreement with experimental results.

키워드

참고문헌

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피인용 문헌

  1. Non-linear creep effects in concrete under uniaxial compression vol.67, pp.16, 2015, https://doi.org/10.1680/macr.14.00307
  2. Review and enhancement of 3D concrete models for large-scale numerical simulations of concrete structures vol.37, pp.3, 2013, https://doi.org/10.1002/nag.1096
  3. Creep influence on buckling resistance of reinforced concrete shells vol.86, pp.7-8, 2008, https://doi.org/10.1016/j.compstruc.2007.07.004
  4. Selecting creep models using Bayesian methods vol.45, pp.10, 2012, https://doi.org/10.1617/s11527-012-9854-x
  5. Geometrically and materially nonlinear creep behaviour of reinforced concrete columns vol.5, 2016, https://doi.org/10.1016/j.istruc.2015.07.001
  6. Modelling creep of high strength concrete vol.7, pp.6, 2007, https://doi.org/10.12989/cac.2010.7.6.533