Decision Making Based on the Value of Information of Different Inspection Methods

Iannacone, Leandro; Gardoni, Paolo; Giordano, Pier Francesco; Limongelli, Maria Pina

doi:10.12783/shm2019/32270

Cited by 6 publications

(3 citation statements)

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“…These are mainly related to the capability of providing continuous information about the global state of a structure without a prior knowledge about the location of possible damages and without the need to access the damaged portion of the structure. A quantification of the economic benefit provided by VBMs is not carried out in this paper, but the interested reader can refer to References 1–3. The possibility to detect damage using responses measured by sensors not necessarily deployed close to the—unknown—location of damage is one of the major advantages of the VBMs.…”

Section: Introductionmentioning

confidence: 99%

Response‐based time‐invariant methods for damage localization on a concrete bridge

Giordano¹,

Limongelli²

2020

Structural Concrete

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This paper is integral part of the Special Issue on “Existing Concrete Structures: Structural Health Monitoring and Testing for condition assessment.” It deals with vibration‐based methods (VBMs) for damage localization that approach the problem of structural integrity management through the analysis of the dynamic response of the structure under ambient or forced vibrations. In the last years, these methods received a widespread interest in the structural health monitoring (SHM) community due to the possibility to use them for continuous SHM and real time damage identification. The performance of these methods is commonly verified on numerical models or laboratory specimens that, by their nature, cannot reproduce all the sources of uncertainties found in practice. The availability of data recorded on a real benchmark, the S101 bridge in Austria, enabled the comparison of three well known vibration‐based time‐invariant methods for damage localization, namely, the curvature method, the interpolation error method, and the strain energy method. The bridge, built in the early 1960, is a typical example of a European highway bridge. Responses to ambient vibrations were recorded both in the undamaged and in several different damage scenarios artificially inflicted to the bridge. This paper reports the results of the application of the three mentioned methods of damage localization to this case study.

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Section: Introductionmentioning

confidence: 99%

Response‐based time‐invariant methods for damage localization on a concrete bridge

Giordano¹,

Limongelli²

2020

Structural Concrete

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“…As such, the formulation can also be used for the problem of decisions made in a post-hazard scenario. This article expands upon the formulation proposed by Iannacone et al, 31 which included the deterioration of engineering systems in the analysis of the VoI of different inspection methods when managing the emergency after a shock. However, Iannacone et al 31 only considered the post-hazard scenario and used approximate models for deterioration.…”

Section: Introductionmentioning

confidence: 98%

“…This article expands upon the formulation proposed by Iannacone et al, 31 which included the deterioration of engineering systems in the analysis of the VoI of different inspection methods when managing the emergency after a shock. However, Iannacone et al 31 only considered the post-hazard scenario and used approximate models for deterioration. Finally, the proposed formulation clearly distinguishes between epistemic and aleatory uncertainty in the deterioration of the system, using the outcome of SHM to reduce the former while keeping the latter unchanged (due to the randomness in the evolution of the system dictated by nature).…”

Section: Introductionmentioning

confidence: 98%

Quantifying the value of information from inspecting and monitoring engineering systems subject to gradual and shock deterioration

Iannacone

Giordano

Gardoni

et al. 2021

Structural Health Monitoring

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The state of engineering systems changes in time due to the effect of gradual (e.g. corrosion, fatigue) and shock deterioration (e.g. earthquakes, floods, and tornados). At specified moments, for example, after a shock, decision-makers might wish to know the state of the system to take the optimal management action. Different data acquisition strategies such as inspections and continuous structural health monitoring (SHM) can help in the definition and prediction of the system state over time. The acquisition of information comes at a cost that must be balanced by the benefit it brings in terms of risk reduction. The value of information from Bayesian decision analysis quantifies the benefit provided by such information. This article proposes a formulation to compute the value of information of inspection and continuous SHM for degrading engineering systems. In the proposed formulation, the information collected before a given time is used to improve the prediction of the effects of gradual and shock deterioration processes and the future probability of failure. This article investigates the case study of a two-span reinforced concrete bridge degrading under the effect of chemical reactions and seismic actions.

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A framework for assessing the value of information for health monitoring of scoured bridges

Giordano

Prendergast

Limongelli

2020

J Civil Struct Health Monit

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It is generally accepted that climate-change is leading to increased frequency of extreme weather events worldwide, and this is placing heavier demands on an already aging infrastructure-network. Bridges are particularly vulnerable infrastructure assets that are prone to damage or failure from climate-related actions. In particular, bridges over waterways can be adversely affected by flooding, specifically the washing away of foundation soils, a mechanism known as scour erosion. Scour is the leading cause of failure for bridges with foundations in water as it can rapidly compromise foundation stiffness often resulting in unacceptable movements or even collapse. There is growing interest among asset managers in applying health monitoring approaches to assess the real-time performance of bridges under damaging actions, including scour. Sensor-based approaches involve the acquisition of data such as dynamic measurements, which can be used to infer the existence of scour or other damage without the Published in Journal of Civil Structural Health Monitoring 10 (3) 2020 pp.485-496 laborious requirements of undertaking visual inspections. In this paper, a framework is proposed to assess the benefit obtained from health monitoring systems as compared to the scenario where no monitoring system is employed on a bridge, to ascertain how useful these systems are at assisting decision-making. Decisions typically relate to the implementation of traffic restrictions or even partial or complete bridge closure in the event of damage being detected, which has associated consequences for a network. A case study is presented to demonstrate the approach postulated in this paper. IntroductionExtreme weather events are becoming more frequent as a result of climate-change and this is putting increasing pressure on built infrastructure. In tandem with this, infrastructure networks worldwide are aging, and many are approaching the end of their original design lives. These two phenomena together mean it is now more important than ever to direct attention to the maintenance and management of the aging asset stock to ensure safe, reliable transport infrastructure exists for generations to come.Bridges are one of the main infrastructure assets at significant risk from climate-induced loading.Bridges with foundations in water are susceptible to scour erosion [1], whereby adverse hydraulic actions remove soil from around and under foundations compromising stability and increasing the risk of failure [2]. The occurrence of scour can cause a reduction in the stiffness and capacity of a bridge foundation [3][4][5] and lead to sudden failure.Scour is most commonly monitored by means of visual inspections, whereby divers inspect a given bridge's foundations periodically (typically at times when flooding is not occurring). Susceptible bridges are usually rated using a scale related to the perceived severity of the scour problem affecting their foundations. The main issues with this type of approach are the subjective nature of the rating schemes adop...

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Decision Making Based on the Value of Information of Different Inspection Methods

Cited by 6 publications

References 0 publications

Response‐based time‐invariant methods for damage localization on a concrete bridge

Response‐based time‐invariant methods for damage localization on a concrete bridge

Quantifying the value of information from inspecting and monitoring engineering systems subject to gradual and shock deterioration

A framework for assessing the value of information for health monitoring of scoured bridges

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