Computers and Concrete

  • 제22권2호
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  • Pages.227-237
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  • 2018
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Evaluation of constitutive relations for concrete modeling based on an incremental theory of elastic strain-hardening plasticity

  • Kral, Petr (Institute of Structural Mechanics, Faculty of Civil Engineering, Brno University of Technology) ;
  • Hradil, Petr (Institute of Structural Mechanics, Faculty of Civil Engineering, Brno University of Technology) ;
  • Kala, Jiri (Institute of Structural Mechanics, Faculty of Civil Engineering, Brno University of Technology)
  • 투고 : 2018.03.13
  • 심사 : 2018.07.16
  • 발행 : 2018.08.25
⟨ 이전 논문 다음 논문 ⟩

초록

Today, the modeling of concrete as a material within finite element simulations is predominantly done through nonlinear material models of concrete. In current sophisticated computational systems, there are a number of complex concrete material models which are based on theory of plasticity, damage mechanics, linear or nonlinear fracture mechanics or combinations of those theories. These models often include very complex constitutive relations which are suitable for the modeling of practically any continuum mechanics tasks. However, the usability of these models is very often limited by their parameters, whose values must be defined for the proper realization of appropriate constitutive relations. Determination of the material parameter values is very complicated in most material models. This is mainly due to the non-physical nature of most parameters, and also the large number of them that are frequently involved. In such cases, the designer cannot make practical use of the models without having to employ the complex inverse parameter identification process. In continuum mechanics, however, there are also constitutive relations that require the definition of a relatively small number of parameters which are predominantly of a physical nature and which describe the behavior of concrete very well within a particular task. This paper presents an example of such constitutive relations which have the potential for implementation and application in finite element systems. Specifically, constitutive relations for modeling the plane stress state of concrete are presented and subsequently tested and evaluated in this paper. The relations are based on the incremental theory of elastic strain-hardening plasticity in which a non-associated flow rule is used. The calculation result for the case of concrete under uniaxial compression is compared with the experimental data for the purpose of the validation of the constitutive relations used.

키워드

과제정보

연구 과제번호 : Damage assessment identification for reinforced concrete subjected to extreme loading

연구 과제 주관 기관 : Czech Science Foundation

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피인용 문헌

  1. Video analysis of response of reinforced concrete beam to impact loading during drop test vol.310, pp.None, 2018, https://doi.org/10.1051/matecconf/202031000049
  2. Elasto-Damage constitutive modelling of recycled aggregate concrete vol.28, pp.1, 2018, https://doi.org/10.12989/cac.2021.28.1.013