Lifecycle performance deterioration modelling of corroded reinforced concrete structures

摘要

In lifecycle management of corrosion affected reinforced concrete structures, it is difficult to correctly assess lifecycle performance due to the uncertainties associated with structural resistance deterioration. This paper presents a stochastic deterioration modelling approach to evaluate the performance deterioration of corroded concrete structures during their service life. The flexural strength deterioration is analytically predicted on the basis of bond strength evolution due to reinforcement corrosion, which is examined by the experimental data available. An assessment criterion is defined to evaluate the flexural strength deterioration for the time-dependent reliability analysis. The results from the numerical example show that the proposed approach is capable of evaluating the structural deterioration and lifecycle performance of the concrete structures suffering from reinforcement corrosion.