engleski

Service life prediction of reinforced concrete bridges in maritime environment

The lecture provides a brief review of in-service performance of the Krk Bridge on the Croatian Adriatic coast. Combination of aggressive maritime environment, inadequate durability design and poor construction quality has led to rapid deterioration of the structure caused by corrosion of reinforcement steel in concrete. In order to develop consistent maintenance policy that would provide efficient and effective management of bridges in maritime environment, the coupled 3D chemo- hygro-thermo mechanical model is developed and implemented into FE code. The application of the model is illustrated on the structural elements of the Krk Bridge. The numerical results are in good agreement with the data obtained on the bridge in different time intervals, what leads to the conclusion that the model is able to realistically predict service life of reinforced concrete structures exposed to chlorides and mechanical damages. Finally, results of parametric analysis are shown and compared with Eurocode 2 requirements for structure durability, e.g. exposure classes, minimum concrete cover thickness and maximum crack width.

durability ; corrosion ; cracks ; concrete ; bridge ; model

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