The bond mechanism between deformed bars and concrete is known to be influenced by a number of parameters, such as the strength of the surrounding structure, yielding of the reinforcement, and corrosion of the reinforcement. A new model of the…
The bond mechanism between deformed bars and concrete is known to be influenced by a number of parameters, such as the strength of the surrounding structure, yielding of the reinforcement, and corrosion of the reinforcement. A new model of the bond mechanism was developed, where the splitting stresses of the bond action are included, and the bond stress depends not only on the slip, but also on the ra- dial deformation between the reinforcement bar and the concrete. The volume increase due to co1rosion of the reinforcement is modelled, together with the mechanical behaviour of the con-osive products. Finite element analyses of cmrosion cracking tests, and pull-out tests with corroded and uncorroded reinforcement were car- ried out. Reasonably good agreement between test results and analyses was obtained. Cracking appeared at about the same corrosion level as in experiments, and the decrease of bond due to splitting of the concrete could be predicted.