Reliability analysis and life cycle costing of rehabilitation strategies for RC structures exposed to marine environment
This paper presents a reliability analysis to predict the probability of corrosion damage and to improve the management of RC structures particularly located in marine environments. The reliability analysis incorporates deterioration models, spatial variability, random field analysis, rehabilitation...
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| Format: | Conference or Workshop Item |
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| Online Access: | http://eprints.uthm.edu.my/2822/ http://eprints.uthm.edu.my/2822/1/Hilyati.pdf |
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| Summary: | This paper presents a reliability analysis to predict the probability of corrosion damage and to
improve the management of RC structures particularly located in marine environments. The reliability analysis
incorporates deterioration models, spatial variability, random field analysis, rehabilitation strategies and
life-cycle costing. This study focus only on chloride-induced cracking as the corrosion due to the chloride
penetration could possibly cause severe cracking at concrete surfaces. This study was aim to improve the existing
crack propagation models by conducting accelerated corrosion tests for transverse reinforcement, to
model the spatial variability of RC columns by using non-stationary random field analysis and to estimate the
life cycle costing of rehabilitation strategies for evaluating the economic performance of 24 repair alternatives
related to chloride-induced corrosion problem. The incorporation of the reliability analysis with the life cycle
costing of rehabilitation strategies have a potential to be a massive contribution for decision makers, asset
owners and engineers to control the initial, present and future cost of assets ownership. In order to improve
the existing crack propagation models, the accelerated corrosion tests are undertaken in two stages; the first
stage which has been completed was focused on the effect of reinforcement confinement (including transverse
reinforcement) and spacing of reinforcing bars on concrete cover cracking and the second stage will be conducted
to improve the existing crack propagation models in order to provide more realistic results. In this paper,
results from the first stage of accelerated corrosion tests are presented and results revealed that confinement
and spacing of reinforcing bars have a significant effect on the rate of crack propagation. |
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