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Article Dans Une Revue Structure and Infrastructure Engineering Année : 2012

The αδ method for modelling expert judgement and combination of non-destructive testing tools in risk-based inspection context: application to marine structures

Jérôme Boéro
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Bruno Capra
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Résumé

Owners of civil infrastructure base their maintenance decision schemes mainly on both structural integrity assessment and consequence analysis. Some inputs come from information collected by inspections with non-destructive or destructive tools. Uncertainties and errors of measurement can lead to bad decisions but are rarely integrated into the decision process. Currently, Risk Based Inspection (RBI) provides the basic concepts for optimizing the maintenance plans of existing structures while insuring satisfactory safety and availability of the structure during its service life. It lies both on reliability computations and probabilistic modeling of inspection results. This last point leads to introduce the Probability of Detection, and the Probability of False Alarms that are usually considered as parameters in Risk Based Inspection. However, when data from inter-calibration campaigns are available, the whole Receiver Operating Characteristics curves should be used. Then the comparison of Non destructive Testing tools in terms of cost/benefit is difficult as well as the method for optimizing a given technique. This paper presents the αβ method that gives a new performance indicator in this context. It is applied to the field of inspection of harbor structures.
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hal-01007359 , version 1 (16-06-2014)

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Franck Schoefs, Jérôme Boéro, Alexandre Clément, Bruno Capra. The αδ method for modelling expert judgement and combination of non-destructive testing tools in risk-based inspection context: application to marine structures. Structure and Infrastructure Engineering, 2012, 8 (6), pp.531-543. ⟨10.1080/15732479.2010.505374⟩. ⟨hal-01007359⟩
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