FraMCoS 7 2010 Jeju, South Korea

On a three dimensional lattice approach for modeling corrosion induced cracking and its influence on bond between reinforcement and concrete

Thepresentworkinvolvesthediscretemodellingofcorrosioninducedcrackingand its influence on the bond between reinforcement and concrete. A lattice approach is used to describe the mechanical inter- action of a corroding reinforcement bar, the surrounding concrete and the interface between steel reinforcement and concrete. The cross-section of…

First page of: On a three dimensional lattice approach for modeling corrosion induced cracking and its influence on bond between reinforcement and concrete
Year 2010
File Size 697 KB
Download PDF (697 KB)

Abstract

Thepresentworkinvolvesthediscretemodellingofcorrosioninducedcrackingand its influence on the bond between reinforcement and concrete. A lattice approach is used to describe the mechanical inter- action 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 inter- action 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.