The probabilistic assessment of structures damaged by corrosioncalls for deterministic models of the degradation of the structuralperformance and probabilistic models accounting for the uncer-tainties in material properties, geometry and models used in thereliability analysis. This paper describes the development of aprobabilistic model of the uncertainties that arise from the pre-diction of the loadbearing capacity of reinforced concrete struc-tures damaged by corrosion of the reinforcement. The investiga-tion focuses on the flexural failure of simply supported beamssuffering from chloride-induced corrosion. The loss of steelcross-sectional area, the reduction in strength and ductility of thecorroded bars, the loss of bond between reinforcement and con-crete and the cracking of the concrete cover are taken into ac-count in a non-linear finite element analysis. The comparison be-tween experimental results and numerical predictions of thefailure load allows the quantification of the model uncertainty ac-cording to the framework proposed by the Joint Committee onStructural Safety. A Bayesian updating methodology is proposedto account for prior knowledge and experimental results.
|Titolo:||Modelling uncertainties for the loadbearing capacity of corroded simply supported RC beams|
|Data di pubblicazione:||2015|
|Digital Object Identifier (DOI):||10.1002/suco.201500016|
|Appare nelle tipologie:||1.1 Articolo in rivista|
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