Indicators for inspection and maintenance planning of concrete structures

Faber, Michael Havbro; Sørensen, John Dalsgaard

doi:10.1016/s0167-4730(02)00033-4

Cited by 64 publications

(48 citation statements)

References 3 publications

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“…Inspections of one element will influence our estimate of the condition of all elements in the zone, due to the dependency in the deterioration performance as modelled by the hyper-parameters A, see Faber and Sørensen (2002). In the following it will be demonstrated how this influence can be efficiently accounted for within the presented framework for modelling the spatial and temporal deterioration characteristics.…”

Section: Updating Of the Model With Inspection Results For Entire Zonesmentioning

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: Updating Of the Model With Inspection Results For Entire Zonesmentioning

confidence: 99%

“…The temporal and spatial deterioration model is adopted from Faber and Sørensen (2002). The different condition states are described by the limit state functions in equations (2) The chosen discretization points are symmetrical around the mean.…”

Section: Examplementioning

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 Bayesian updating approach can be used to incorporate information obtained from different sources at different point-in-time during long service lives, for example, either from detailed inspections and monitoring or even from the qualitative assessment methods, that is, visual inspections or service records, and so forth. An application related to concrete structures is presented by Faber and Sorensen [28], where inspection results are used to evaluate the condition states of bridges at any given time.…”

Section: Shm Supported Deterioration Predictionmentioning

confidence: 99%

Performance Updating of Concrete Structures Using Proactive Health Monitoring: A Systems Approach

Rafiq

2012

ISRN Civil Engineering

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Uncertainties in predictive models for concrete structures performance can influence adversely the timing of management activities. A methodology has been developed that uses data obtained through proactive health monitoring to increase the confidence in predicted performance by reducing the associated uncertainties. Due to temporal and spatial variations associated with climatic changes, exposure conditions, workmanship, and concrete quality, the actual performance could vary at different locations of the member. In this respect, the use of multiple sensors may be beneficial, notwithstanding cost and other constraints. Two distinct cases are identified for which an updating methodology based on data from multiple sensors needs to be developed. In the first case the interest lies in improving the performance prediction for an entire member (or a structure) incorporating spatial and temporal effects. For this purpose, the member is divided into small zones with the assumption that a sensor can be located in each zone. In the second case, the objective is to minimise uncertainties in performance prediction, or to increase the redundancy of health monitoring systems, at critical locations. The development of updating methodologies for the abovementioned scenarios is described in this paper. Its implications on the management activities, for example, establishing the timing of principal inspections, are evaluated and discussed.

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“…Information can come from Condition Monitoring Systems (CMS), inspections and/or indicators. Indicators that contain indirect information (e.g., failure rates) might be formulated and updated based on Bayesian statistics, see [5].…”

Section: Damage and Uncertainty Modelingmentioning

confidence: 99%

Reliability Assessment of Solder Joints in Power Electronic Modules by Crack Damage Model for Wind Turbine Applications

Kostandyan

Sørensen

2011

Energies

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Abstract:Wind turbine reliability is an important issue for wind energy cost minimization, especially by reduction of operation and maintenance costs for critical components and by increasing wind turbine availability. To develop an optimal operation and maintenance plan for critical components, it is necessary to understand the physics of their failure and be able to develop reliability prediction models. Such a model is proposed in this paper for an IGBT power electronic module. IGBTs are critical components in wind turbine converter systems. These are multilayered devices where layers are soldered to each other and they operate at a thermal-power cycling environment. Temperature loadings affect the reliability of soldered joints by developing cracks and fatigue processes that eventually result in failure. Based on Miner's rule a linear damage model that incorporates a crack development and propagation processes is discussed. A statistical analysis is performed for appropriate model parameter selection. Based on the proposed model, a layout for component life prediction with crack movement is described in details.

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Indicators for inspection and maintenance planning of concrete structures

Cited by 64 publications

References 3 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

Performance Updating of Concrete Structures Using Proactive Health Monitoring: A Systems Approach

Reliability Assessment of Solder Joints in Power Electronic Modules by Crack Damage Model for Wind Turbine Applications

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