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On the Numerical Modelling of Bond for the Failure Analysis of Reinforced Concrete

Peter Grassl ; Morgan Johansson (Institutionen för arkitektur och samhällsbyggnadsteknik, Konstruktionsteknik) ; Joosef Leppänen (Institutionen för arkitektur och samhällsbyggnadsteknik, Konstruktionsteknik)
Engineering Fracture Mechanics (0013-7944). (2017)
[Artikel, refereegranskad vetenskaplig]

The structural performance of reinforced concrete relies heavily on the bond between rein- forcement 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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Denna post skapades 2017-12-08.
CPL Pubid: 253632

 

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