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Abstract
The present work involves the discrete modelling of corrosion induced cracking and
its influence on the bond between reinforcement and concrete. A lattice approach is
used to describe the mechanical interaction of a corroding reinforcement bar, the
surrounding concrete and the interface between steel reinforcement and concrete. The
cross-section of the ribbed reinforcement bar is taken to be circular, assuming that
the interaction of the ribs of the deformed reinforcement bar and the surrounding
concrete is included in a cap-plasticity interface model. The expansion of the corrosion
product is represented by an eigenstrain in the lattice elements forming the interface.
The lattice modelling approach is applied to the analysis of corrosion induced cracking
and its influence of the bond strength. The model capabilities are assessed by comparing
results of analyses with those from unconfined pull-out tests reported in the literature.
Future work will investigate the influence of the stiffness of interface elements
and the effect of lateral confinement on corrosion induced cracking.