A simplified method for holistic value of information computation for informed structural integrity management under uncertainty

Title: A simplified method for holistic value of information computation for informed structural integrity management under uncertainty
Other Titles: Holistic Value of Information Computation Methods for Informed Structural Integrity Management under Uncertainty
Authors: Zou, GuangFaber, Michael HavbroGonzález, ArturoBanisoleiman, Kian
Permanent link: http://hdl.handle.net/10197/12146
Date: Mar-2021
Online since: 2021-05-11T15:00:44Z
Abstract: Collecting structural information by inspection or monitoring is important means to reduce uncertainty and improve the qualities of maintenance decisions in structural integrity management. However, information collecting inevitably involves some costs. When information collecting brings added value and to what extent uncertainty reduction suffices are questions that are often not fully accounted for before information collecting activities are carried out. Value of information (VoI) computation helps justifying investments and informing efficient strategies for information collecting. This paper develops a holistic approach to quantify the VoI from multiple inspections in the lifetime of an engineering structure, taking into account combined effects of lifetime maintenance interventions. The approach can be used for holistic planning and optimization of lifetime inspections at an early stage. Also, a simplified VoI computation approach is developed for some maintenance decision cases based on an alignment decision strategy (ADS). The approaches are exemplified on a typical marine structure, and sensitivities of VoI to the number of planned interventions, cost ratio, inspection times and methods are studied. It is shown that the ADS and the simplified method are well applicable when the number of planned interventions is large. The optimal maintenance decisions and inspection times obtained by VoI-based and cost-based optimization methods are compared.
Funding Details: European Commission Horizon 2020
Type of material: Journal Article
Publisher: Elsevier
Journal: Marine Structures
Volume: 76
Copyright (published version): 2020 Elsevier
Keywords: Structural integrity managementUncertaintyRisk analysisBayesian inferenceDecision analysisLife cycle costs
DOI: 10.1016/j.marstruc.2020.102888
Language: en
Status of Item: Peer reviewed
ISSN: 0951-8339
This item is made available under a Creative Commons License: https://creativecommons.org/licenses/by-nc-nd/3.0/ie/
Appears in Collections:Critical Infrastructure Group Research Collection
Earth Institute Research Collection
Civil Engineering Research Collection
TRUSS-ITN Research Collection

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