Modelling crack propagation in reinforced concrete using a hybrid finite element-scaled boundary finite element method

Ean Tat Ooi, Zhen Jun Yang

    Research output: Contribution to journalArticlepeer-review

    Abstract

    A previously developed hybrid finite element-scaled boundary finite element method (FEM-SBFEM) is extended to model multiple cohesive crack propagation in reinforced concrete. This hybrid method can efficiently extract accurate stress intensity factors from the semi-analytical solutions of SBFEM and is also flexible in remeshing multiple cracks. Crack propagation in the concrete bulk is modelled by automatically inserted cohesive interface elements with nonlinear softening laws. The concrete-reinforcement interaction is also modelled by cohesive interface elements. The bond shear stress-slip relation of CEB-FIP Model Code 90 and an empirical confining stress-crack opening relation are used to characterise slip and split failure at the concrete-reinforcement interface, respectively. Three RC beams were simulated. The numerical results agreed well with both experimental and numerical results available in the literature. Parametric studies demonstrated the importance of modelling both slip and split failure mechanisms at the concrete-reinforcement interface. © 2010 Elsevier Ltd.
    Original languageEnglish
    Pages (from-to)252-273
    Number of pages21
    JournalEngineering Fracture Mechanics
    Volume78
    Issue number2
    DOIs
    Publication statusPublished - Jan 2011

    Keywords

    • Cohesive interface elements
    • Multiple crack propagation
    • Reinforced concrete
    • Remeshing
    • Scaled boundary finite element method

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