Uniaxial tensile constitutive model of fiber reinforced concrete considering bridging effect and its numerical algorithm

Abstract

This paper proposes a constitutive model of fiber reinforced concrete (FRC) composites under uniaxial tensile load considering fiber bridging effect, and the corresponding numerical algorithm is given. Due to the linear simplification on plain concrete’s constitutive model, and adoption of the explicit modified Euler integral algorithm, the solving process of this numerical model is greatly simplified. In addition, the numerical implementation algorithm of the model in ABAQUS through user-defined subroutine (UMAT) is given. The finite element calculation results and the experimental results under uniaxial tensile load are in good agreement, which proves that the model has good accuracy in predicting the peak stress of FRC under different fiber content. The simplification method proposed and the solution algorithm induced in this paper can ensure the stability and accuracy of the results, which provide a feasible development direction for FRC calculation in large-scale structures.

Keywords:

• constitutive model
• fiber reinforced concrete
• bridging effect
• Euler integral algorithm
• UMAT

Acknowledgments

The authors greatly acknowledge the General Program of National Natural Science Foundation of China (51878155).National Science Fund for Distinguished Young Scholars, China (51925903). National Postdoctoral Program for Innovative Talents (BX2021065). Science and Technology Research and Development Plan of China Railway Corporation " Research on key technology of design and construction and performance improvement of reinforced concrete in coastal environment with strong corrosion" (N2020G055). Science and Technology Research and Development Plan of China Railway Corporation "Technology Research on Key Passenger Stations in Beijing–Tianjin–Hebei Region" (P2018G049).

Credit authorship contribution statement

Jinyang Jiang: Formal analysis conceptualization, methodology, software, writing – review and editing, resources. Qi Luo: data curation, formal analysis, investigation, methodology, writing – original draft – review, methodology, software. Fengjuan Wang: data curation, review and editing. Guowen Sun: data curation, review and editing. Zhiyong Liu: supervision, methodology.

Additional information

Funding

General Program of National Natural Science Foundation of China (51878155). National Science Fund for Distinguished Young Scholars, China (51925903). National Postdoctoral Program for Innovative Talents (BX2021065). Science and Technology Research and Development Plan of China Railway Corporation " Research on key technology of design and construction and performance improvement of reinforced concrete in coastal environment with strong corrosion" (N2020G055). Science and Technology Research and Development Plan of China Railway Corporation "Technology Research on Key Passenger Stations in Beijing–Tianjin–Hebei Region" (P2018G049).