On the numerical modelling of bond for the failure analysis of reinforced concrete

•Perfect bond and bond slip failure analyses of reinforced concrete with a crack-band model.•Perfect bond model produces mesh-dependent crack patterns.•Results for bond-slip model are mesh-independent.•The numerical results are in good agreement with experiments. The structural performance of reinfo...

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Bibliographic Details
Published in:Engineering fracture mechanics Vol. 189; pp. 13 - 26
Main Authors: Grassl, Peter, Johansson, Morgan, Leppänen, Joosef
Format: Journal Article
Language:English
Published: New York Elsevier Ltd 15.02.2018
Elsevier BV
Subjects:
Bond
Bond strength
Concrete
Constitutive models
Damage-plasticity
Deformation
Drop tests
Ductility
Failure
Failure analysis
Fiber reinforced materials
Finite element analysis
Finite element method
Mathematical models
Nonlinear analysis
Reinforced concrete
Reinforcement
Slip
Stiffening
Tension stiffening
Reinforcement
Concrete
Bond
Damage-plasticity
Failure
ISSN:0013-7944, 1873-7315
Online Access:Get full text
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Summary:•Perfect bond and bond slip failure analyses of reinforced concrete with a crack-band model.•Perfect bond model produces mesh-dependent crack patterns.•Results for bond-slip model are mesh-independent.•The numerical results are in good agreement with experiments. The structural performance of reinforced concrete relies heavily on the bond between reinforcement and concrete. In nonlinear finite element analyses, bond is either modelled by merged, also called perfect bond, or coincident with slip, also called bond-slip, approaches. Here, the performance of these two approaches for the modelling of failure of reinforced concrete was investigated using a damage-plasticity constitutive model in LS-DYNA. Firstly, the influence of element size on the response of tension-stiffening analyses with the two modelling approaches was investigated. Then, the results of the two approaches were compared for plain and fibre reinforced tension stiffening and a drop weight impact test. It was shown that only the coincident with slip approach provided mesh insensitive results. However, both approaches were capable of reproducing the overall response of the experiments in the form of load and displacements satisfactorily for the meshes used.
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ISSN:0013-7944
1873-7315
DOI:10.1016/j.engfracmech.2017.10.008