Prediction of corrosion initiation in reinforced concrete members subjected to environmental stressors: A finite‐element framework

Shafei, Behrouz; Alipour, Alice; Shinozuka, Masanobu

doi:10.1016/j.cemconres.2011.11.001

Cited by 76 publications

(30 citation statements)

References 24 publications

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“…The exposure conditions assumed in this study are consistent with those reported by McGee [26], Glass and Buenfeld [15], Martin-Perez et al [25], and Val [47]. A full review on the possible range of surface chloride content is given in Shafei et al [35].…”

Section: Beta Distributionsupporting

confidence: 60%

“…Furthermore, the inherent nonlinear properties and time-dependent characteristics of the involved parameters must be taken into account at each step of analysis. To investigate all these aspects, Shafei et al [35] developed a rigorous FE framework that examines the corrosion process in detail throughout the service life of RC structures. This framework identifies the most important parameters that influence the corrosion of RC components and estimates the extent of penetration of corrosive agents into concrete at various time steps.…”

Section: Integration Of Random Fields Into Fe Frameworkmentioning

confidence: 99%

“…Although several predictive models have been developed to determine the corrosion initiation time (e.g., [21,4]), most of them are based on simplistic assumptions and do not take into account the contribution of all the influential factors. To address this issue, the comprehensive FE model developed by Shafei et al [35] is used in this study and the corrosion initiation time is obtained for a set of expected exposure conditions.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Application of large-scale non-Gaussian stochastic fields for the study of corrosion-induced structural deterioration

Shafei

Alipour

2015

Engineering Structures

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Section: Beta Distributionsupporting

confidence: 60%

Section: Integration Of Random Fields Into Fe Frameworkmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Application of large-scale non-Gaussian stochastic fields for the study of corrosion-induced structural deterioration

Shafei

Alipour

2015

Engineering Structures

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“…To address these issues, the current study improves the previous approaches by taking advantage of the comprehensive FE model developed by Shafei et al (). As discussed in the previous section, the proposed 3D model is capable of capturing the nonlinear effects of various environmental stressors in addition to their mutual interactions.…”

Section: Stochastic Simulation Of Corrosion Processesmentioning

confidence: 99%

A Stochastic Computational Framework to Investigate the Initial Stage of Corrosion in Reinforced Concrete Superstructures

Shafei

Alipour

Shinozuka

2013

Computer aided Civil Eng

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This article presents a stochastic computational framework to investigate the chloride‐induced corrosion of reinforced concrete superstructures. For this purpose, three‐dimensional finite‐element models are developed to determine the extent of chloride penetration into the superstructure components. One of the unique capabilities of this framework is to simultaneously consider all the major factors that affect the corrosion process. Furthermore, the developed framework integrates various sources of uncertainty into the performance predictions. This will be achieved by modifying the element properties and boundary conditions of the finite‐element models at each time step. For a reliable durability assessment of deteriorating structural components, the proposed framework incorporates the temporal and spatial uncertainties of the influential parameters into the finite‐element analysis. Considering that most of the parameters involved in the corrosion process follow non‐normal distributions, a series of non‐Gaussian stochastic fields are generated following a computationally efficient procedure. The results calculated from extensive stochastic simulations are expressed in terms of the likelihood and extent of corrosion initiation. The outcome of this study indicates that the computational investigation of the corrosion process can be significantly improved if a reliable probabilistic framework is employed instead of conventional deterministic approaches.

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“…Amongst the numerical methods used, the FEM is the most common. For example, in the first ingress stage (Pan and Wang, 2011;Shafei et al, 2012;Muthulingam and Rao, 2014), where the ingress of chloride ions through the concrete cover is modeled with finite elements, some works consider the interface between aggregates and mortar, different reinforcement configurations in the transversal section and the properties of concrete and ion diffusion to determine the beginning of the cracking in the steel-concrete interface. In the second stage (Chernin and Val, 2011;Ožbolt and Oršanić, 2014;Guzmán and Gálvez, 2017), the finite element models show the cracking pattern in the concrete cover depends primarily on the diameter of the reinforcement, concrete cover, position of the anode and cathode, and the transport of corrosion products through of the cracks; previous studies by Guzmán and Gálvez (2017), found that in the case of non-uniform corrosion around the steel, the time at which the first visible crack appears on the surface is earlier than the time for uniform corrosion.…”

Section: Introductionmentioning

confidence: 99%

Modeling Steel Corrosion Failure in Reinforced Concrete by Cover Crack Width 3D FEM Analysis

et al. 2020

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A new predictive 3D FEM model is proposed using the corrosion damage function by measuring the concrete cover crack width, which is a function of the free concrete cover depth, the steel rebar diameter, the mechanical properties of the concrete, and the length of the anodic zone. A significant aspect to evaluate service lifetime conditions in corroded reinforced concrete structures (RCSs) is the concrete cover crack width. Surface cracks originate due to the pressure exerted by the volume expansion of the corrosion products and oxide layer formed on the rebars. In this work, concrete cover crack width on corroded RCS is analyzed by means of finite element method allowing a corrosion damage model to be proposed. The model obtained was used to find a theoretical relationship between the dissolved steel (corrosion process) and the concrete cover crack width. The results were validated using three experimental data sets from the literature: two corrosion case studies in natural environments and one work covering accelerated corrosion in laboratory test conditions. All the beams were exposed to the simultaneous action of flexural stresses and corrosion. A good correlation was observed between the model and the experimental results, thus supporting reliability of the analytical process and validation of the proposed corrosion damage model.

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Prediction of corrosion initiation in reinforced concrete members subjected to environmental stressors: A finite‐element framework

Cited by 76 publications

References 24 publications

Application of large-scale non-Gaussian stochastic fields for the study of corrosion-induced structural deterioration

Application of large-scale non-Gaussian stochastic fields for the study of corrosion-induced structural deterioration

A Stochastic Computational Framework to Investigate the Initial Stage of Corrosion in Reinforced Concrete Superstructures

Modeling Steel Corrosion Failure in Reinforced Concrete by Cover Crack Width 3D FEM Analysis

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