Condition Evolution in Bridge Management Systems and Corrosion-Induced Deterioration

Roelfstra, Guido; Hajdin, Rade; Adey, Bryan T.; Brühwiler, Eugen

doi:10.1061/(asce)1084-0702(2004)9:3(268)

Cited by 75 publications

(44 citation statements)

References 4 publications

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“…The major difficulty in the assessment of P lies in the number of parameters a ij to estimate. Various studies consider a Markov matrix with two parameters for state (Pappas et al, 2001, Roelfstra et al, 2004. In this case, the transition probabilities can be estimated from a non-linear regression.…”

Section: Transition Matrices For Modeling Chloride Ingressmentioning

confidence: 99%

“…In this case, the transition probabilities can be estimated from a non-linear regression. However, complex stochastic phenomena cannot be modeled by a transition matrix with two transition probabilities per state (Roelfstra et al 2004). To solve this problem, the proposed method searches the values a ij that minimize the difference between the probabilities estimated from simulations and the obtained from the Markov model (equation [5]).…”

Section: Transition Matrices For Modeling Chloride Ingressmentioning

confidence: 99%

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Probabilistic Optimization of the Management of Corroding RC Structures

Bastidas‐Arteaga

Schoefs

Sánchez-Silva

2011

Structures Congress 2011

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This study presents a stochastic method to optimize the inspection of reinforced concrete structures subjected to chloride penetration. The strategy is oriented to find the time interval between two consecutive inspections that (1) minimize the costs of inspection, preventive and corrective repair; and (2) ensure a given level of safety. The optimal interval is therefore determined by using stochastic processes and decision theory. The chloride penetration phenomenon is represented by a Markov chain whose transition matrix is determined from simulations.

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Section: Transition Matrices For Modeling Chloride Ingressmentioning

confidence: 99%

Section: Transition Matrices For Modeling Chloride Ingressmentioning

confidence: 99%

Probabilistic Optimization of the Management of Corroding RC Structures

Bastidas‐Arteaga

Schoefs

Sánchez-Silva

2011

Structures Congress 2011

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“…. , m. With such a description we can achieve a certain compatibility with the condition rating of existing infrastructure management systems 5),6),7),8),9), 10) . The states are numbered in our case in such a way, that state 1 corresponds to no deterioration, state 2 corresponds to very minor deterioration, and so on, until state m, which denotes structural failure, that is, structural collapse.…”

Section: Deterioration Model (1) Condition Statesmentioning

confidence: 99%

“…As will be shown in this paper, for this purpose not only all significant life-cycle costs, such as construction, failure, inspection and rehabilitation costs have to be taken into account, as is done, for example, in existing bridge management systems 5),6),7),8),9), 10) , but also the, in general, state-or time-dependent benefit rates. Because only by specifying both costs and benefits we can rationally define acceptable risks, acceptable failure rates and, consequently, optimal lifetimes 11) .…”

Section: Introductionmentioning

confidence: 99%

Cost-Benefit Based Optimization of Maintenance Interventions for Deteriorating Structures

Higuchi

Macke

2007

Structural Eng./Earthquake Eng.

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In most more economically developed countries an ever growing percentage of existing structures is threatened by obsolescence in the short-to medium-term-either because of structural deficits due to deterioration, or due to functional aging. To ensure sustained serviceability and safety of these structures, maintenance interventions are utilized, which allow partial or complete structural rehabilitation. However, such maintenance interventions have to be economically reasonable, that is, maintenance expenditures spent have to be outweighed by expected future benefits. For this purpose, we propose herein a novel optimization formulation for maintenance planning based on cost-benefit criteria. The usefulness of the proposed approach lies in the fact, that it not only allows to determine optimal sequences of maintenance times, rehabilitation levels and inspection qualities, but also allows to specify economically optimal lifetimes and acceptable failure rates of structures. The modeling of structural deterioration and maintenance, as well as the setting of all relevant cost factors is discussed in detail. Numerical examples investigate the effect of imperfect execution of maintenance actions and functional aging.

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“…(3) will be reduced by 139 multiplying the water diffusivity with the coefficient (1-R) (Roelfstra et al 2004). …”

mentioning

confidence: 99%

Mesoscale Modeling of Chloride Penetration in Unsaturated Concrete Damaged by Freeze-Thaw Cycling

Wang

Ueda

2014

J. Mater. Civ. Eng.

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For concrete structures exposed to frost attack, cracks or microcracks induced by 5 freeze-thaw cycling can format interconnecting flow paths and allow more water or chloride ions to 6 penetrate into the bulk concrete. It will subsequently facilitate further deterioration of concrete 7 structures and accelerate the corrosion of embedded reinforced steel bars. Moreover, in reality most 8 concrete structures are rarely fully saturated, so that chloride transportation in unsaturated concrete 9 must be studied with respect to the water moving process in order to cover the real existing service 10 conditions. In the current work, a numerical simulation method based on the mesoscale composite

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Condition Evolution in Bridge Management Systems and Corrosion-Induced Deterioration

Cited by 75 publications

References 4 publications

Probabilistic Optimization of the Management of Corroding RC Structures

Probabilistic Optimization of the Management of Corroding RC Structures

Cost-Benefit Based Optimization of Maintenance Interventions for Deteriorating Structures

Mesoscale Modeling of Chloride Penetration in Unsaturated Concrete Damaged by Freeze-Thaw Cycling

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