Validation of a numerical model for singly reinforced corroded concrete beams

Numerical models of corroded reinforced concrete beams are often based on damage relations. The choice of relations and modelling approaches have varied in the literature. Therefore, the paper explains the choice of a proper set of damage relations and validates the approach on the results of three-point bending tests in terms of load-displacement relations, crack patterns and failure mode. The damage to the reinforcement is input as average and variable cross-section loss which is coupled by a model to reduce its material properties. The bond loss is based on calibrated multi-linear curves from pull-out tests done in the framework of the same project. The results show that reducing the steel material properties is important while both the average and the variable section loss yield good predictions for the considered corrosion range. Incorporating the suggested bond-slip law in the corroded beam model affects the cracking pattern, however, no full agreement between numerical and experimental crack patterns was obtained.

ISBN:978-2-940643-06-6

Publication year:2020

Accessibility:Open