Development of a probabilistic life-cycle cost model for marine structures exposed to chloride attack based on Bayesian approach using monitoring data

Jung, Hyunjun; Park, Heung Min; Kim, Gyuseon; Kong, Jun

doi:10.1007/s12205-013-0350-9

Cited by 10 publications

(3 citation statements)

References 31 publications

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“…The probabilistic evaluation of the service life can be implemented to evaluate the distribution of LCC improving the reliability of the technical-economical evaluation [18][19][20][21][22].…”

Section: Concrete Under Severe Conditions -Environment and Loadingmentioning

confidence: 99%

Evaluation of Additional Protection Methods to Control Reinforcement Corrosion

Bolzoni

Beretta

Brenna

et al. 2016

KEM

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The prevention of reinforcement corrosion is primarily achieved by using high quality concrete, adequate concrete cover and suitable casting and curing. Additional prevention methods are adopted when severe environmental conditions occur on structures requiring very long service life. While existing standards, EN 206 or Eurocode 2, adopt prescriptive approach, performance based methods can improve the evaluation of the service life and enable the comparison of available design options. The reliability of the prediction is very important and even widely used models (e.g. fib Model Code) still have open questions. In this paper different additional protection are evaluated: corrosion inhibitors, stainless steel rebars, concrete coatings. A simplified approach is used, considering that the serviceability limit state, i.e. initiation of corrosion in chloride containing environments, can be modeled through the analytical solution of the 2nd Fick’s law of diffusion. The main factors influencing corrosion initiation (critical chlorides concentration, chlorides diffusion coefficient, surface chloride concentration, concrete cover) are represented by distribution of values and the probability distribution of service life is evaluated by Monte Carlo simulation.

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Section: Concrete Under Severe Conditions -Environment and Loadingmentioning

confidence: 99%

Evaluation of Additional Protection Methods to Control Reinforcement Corrosion

Bolzoni

Beretta

Brenna

et al. 2016

KEM

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“…Another research field that is emerging is the use of test and monitoring data of chloride content for decision making by applying Bayesian statistics. Jung et al [19] developed a probabilistic life-cycle cost model for marine structures exposed to chloride attack based on a Bayesian approach using monitoring data. Tran et al [20] studied Bayesian updating for the optimization of inspection schedules of chloride ingress into concrete.…”

Section: Introductionmentioning

confidence: 99%

Value of Information (VoI) for the Chloride Content in Reinforced Concrete Bridges

et al. 2020

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The corrosion of reinforcement caused by chloride ingress significantly reduces the length of the service life of reinforced concrete bridges. Therefore, the condition of bridges is periodically inspected by specially trained engineers regarding the possible occurrence of reinforcement corrosion. Their main goal is to ensure that the structure can resist mechanical and environmental loads and offer a satisfactory level of safety and serviceability. In the course of assessment, measuring the chloride content, through which corrosion could be anticipated and prevented, presents a possible alternative to visual inspections and corrosion tests that can only indicate already existing corrosion. It is hard to determine the cost-effectiveness and actual value of chloride content measurements in a simple and straightforward way. Thus, the main aim of the paper was to study the value of newly gained information, which is obtained when a chloride content in reinforced concrete bridges is measured. This value was here analyzed through the pre-posterior analysis of the cost of measurement and repair, taking into account different types of exposure and material properties for a general case. The research focus was set on the initiation phase in which there are no visible damages. A relative comparison of costs is presented, where the cost of possible reactive/proactive repair was compared with the maximum cost of measurement, while the measurement is still cost effective. The analysis showed a high influence of the initial probability of depassivation on the maximum cost of the cost-effective measurement, as well as a nonreciprocal relation of the minimum cost of cost-effective reactive repair with the measurement accuracy.

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“…Offshore structures are exposed to harsh environmental conditions that cause durability problems and shortening in the service life of the RC structure, which lead to high maintenance and repair costs [1]. One of the most reasons that reduce the durability of offshore RC structures is the corrosion of embedded reinforcing steel [2].…”

Section: Introductionmentioning

confidence: 99%