Condition Indicators for Inspection and Maintenance Planning

Wicki, Regula; Malioka, Vasiliki; Faber, Michael Havbro

doi:10.1061/40707(240)35

Cited by 4 publications

(4 citation statements)

References 4 publications

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“…The so-called Probability of Detection (PoD) model has been applied to this problem since the early 1970s, see Tang (1973). For concrete structures subject to corrosion of the reinforcement, inspection performance models have been developed for several non-destructive evaluation techniques (NDE) (see Wicki et al 2003), which describe the probability of a specific inspection outcome given a particular condition of the inspected element or structure.…”

Section: Computation Of the Spatial And Temporal Deterioration Modelmentioning

confidence: 99%

“…As an example, the probability of being in the condition state 'corrosion initiation' is assessed as the probability that corrosion has initiated and that visible corrosion has not (yet) occurred. When inspection or monitoring results z are available, the probabilities of occurrence of the different conditions states are updated accordingly, by applying limit state functions describing the inspection outcome, see Wicki et al (2003).…”

Section: Temporal Modellingmentioning

confidence: 99%

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A framework for the asset integrity management of large deteriorating concrete structures

Straub

Malioka²,

Faber³

2009

Structure and Infrastructure Engineering

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Many concrete structures can be considered as large parts of engineering systems. For these, realistic modelling of deterioration and the planning of inspection and maintenance activities requires explicit consideration of the interdependencies among the individual elements of the structure. Ageing of the infrastructure has become increasingly recognized by engineers and decision makers as being important, yet relatively few research projects have addressed this topic to date. The present paper provides an overview of the decision problems related to the planning of inspection, monitoring and maintenance activities in large engineering systems. This is followed by the presentation of a model framework for the representation of spatial and temporal variability of deterioration, illustrated by consideration of chloride-induced corrosion of the reinforcement in concrete structures. The framework is computationally highly efficient and facilitates the consistent, quantitative modelling of the risks from deterioration for the entire system at all points in time. Finally, it is demonstrated how the framework can be applied to optimize the planning of inspection and maintenance activities for large concrete structures.

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Section: Computation Of the Spatial And Temporal Deterioration Modelmentioning

confidence: 99%

Section: Temporal Modellingmentioning

confidence: 99%

A framework for the asset integrity management of large deteriorating concrete structures

Straub

Malioka²,

Faber³

2009

Structure and Infrastructure Engineering

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“…The modeling of other indicators, however, follows the same principles. Specific quantitative models for different inspection techniques are provided in Malioka and Faber (2003) and Wicki et al (2003).…”

Section: Identification and Description Of Condition Indicatorsmentioning

confidence: 99%

“…The critical chloride content C cr is defined as the concentration of chlorides on the surface of the reinforcement that leads to damage of the surrounding concrete structure (small cracks) (Wicki et al, 2003). Using this definition C cr is dependent on environmental parameters such as oxygen supply and humidity.…”

Section: Critical Chloride Contentmentioning

confidence: 99%

A Computational Framework for Risk Assessment of RC Structures Using Indicators

Faber

Straub

Maes

2006

Comp-aided Civil Eng

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The present article starts out by proposing a framework for risk assessment of RC structures utilizing condition indicators. Thereafter, the various building stones of the suggested framework are described. This description includes a summary of the basis for the probabilistic modeling of the initiation phases of chlorideinduced corrosion of concrete structures. Furthermore, a probabilistic modeling of condition indicators regarding the condition state of concrete structures is proposed whereby information available at the design stage of concrete structures as well as information obtained through in-service inspections may be utilized for the purpose of reliability updating. Finally, it is described how the probability of localized and spatially distributed degradation of different degrees can be assessed and examples are given on how the various indicators may be used for the purpose of updating the statistical characteristics of the future degradation of RC structures. The presented framework forms a consistent basis for risk assessment of concrete structures subject to chloride-induced corrosion. It can easily be adopted to other degradation phenomena such as carbonation-induced corrosion and it forms a good basis for the development of efficient approaches to Asset Integrity Management of RC structures.

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Risikobasierte Inspektionsstrategien für den optimalen Unterhalt von Tragwerken

Straub

Faber

2006

Stahlbau

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Condition Indicators for Inspection and Maintenance Planning

Cited by 4 publications

References 4 publications

A framework for the asset integrity management of large deteriorating concrete structures

A framework for the asset integrity management of large deteriorating concrete structures

A Computational Framework for Risk Assessment of RC Structures Using Indicators

Risikobasierte Inspektionsstrategien für den optimalen Unterhalt von Tragwerken

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