Reliability-based assessment of the effect of climatic conditions on the corrosion of RC structures subject to chloride ingress

Hassan, Jinane El; Bressolette, Philippe; Chateauneuf, Alaa; Tawil, Khaled El

doi:10.1016/j.engstruct.2010.07.001

Cited by 105 publications

(36 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In fact, Andrade et al [23] demonstrate the importance of surface concentration by comparing eight diffusion models. The results indicate that the surface concentration assumes a much more significant role than the diffusion coefficient, a theme that usually attracts a much larger number of studies, which is in line with parametric analyses performed by other authors [24,25]. The authors conclude by stating that a crucial factor is to have a law of consistent surface concentration evolution.…”

Section: Boundary Conditionssupporting

confidence: 74%

Computational modeling for predicting corrosion initiation in reinforced concrete structures

Dominicini

Gama

2017

Rev. IBRACON Estrut. Mater.

View full text Add to dashboard Cite

ResumoThis article presents a model for penetration of chloride by diffusion in reinforced concrete structures based on the solution of the Fick's 2nd Law, using the finite element method (FEM) in two-dimensional domain. This model predicts the time, in a given situation, so that a certain limit of chlorides for depassivation of reinforcement is reached, characterizing the end of service life. Several approaches for the chloride surface concentration and for the diffusion coefficient are used, parameter which must be corrected due to the effects of temperature, solar radiation, exposure time, and relative humidity. Moreover, a parametric analysis is carried out in order to study the factors involved and their impact on the ingress of chlorides by diffusion, contributing to a better understanding of the phenomenon. In addition, the developed model is applied to the cities of Vitória (ES) and Florianópolis (SC) to analyze the service life for different concrete covers, making a comparison with the Brazilian standard.Keywords: chlorides, corrosion, diffusion, finite element method, service life.Este trabalho apresenta um modelo de penetração de cloretos por difusão em estruturas de concreto armado baseado na solução da 2ª Lei de Fick, utilizando o método dos elementos finitos (MEF) no domínio bidimensional. Este modelo prevê o tempo necessário, em determinada situação, para que um determinado limite de cloretos para a despassivação da armadura seja atingido, caracterizando o fim da vida útil. Utilizam-se diversas abordagens para a concentração superficial de cloretos e para o coeficiente de difusão, parâmetro que deve ser corrigido devido aos efeitos da temperatura, da radiação solar, do tempo de exposição e da umidade relativa. Além do mais, é realizada análise paramétrica visando o estudo dos fatores intervenientes e seus impactos na penetração de cloretos por difusão, de modo a contribuir para uma maior compreensão do fenômeno. Ademais, o modelo desenvolvido é aplicado às cidades de Vitória (ES) e Florianópolis (SC) analisando-se a vida útil para diferentes cobrimentos de concreto, fazendo um paralelo com a norma brasileira.Palavras-chave: cloretos, corrosão, difusão, método dos elementos finitos, vida útil.

show abstract

Section: Boundary Conditionssupporting

confidence: 74%

Computational modeling for predicting corrosion initiation in reinforced concrete structures

Dominicini

Gama

2017

Rev. IBRACON Estrut. Mater.

View full text Add to dashboard Cite

show abstract

“…Using the probabilistic pitting corrosion parameters presented in Table , Monte Carlo simulation (MCS) is employed to calculate the time of corrosion initiation and current using El Hassan et al formulations as follows:

T_{ini} = \frac{e^{2}}{4 D_{c} ((), {erfc}^{- 1} ((), \frac{C_{th}}{C_{S}}))},

ln ((), i_{corr}) = 0.0312 RH - 4736 / T + 1.695 italicwc - 0.0391 e + 14.589,

…”

Section: Corrosion and Frp Degradation Modelingmentioning

confidence: 99%

Life cycle reliability assessment of reinforced concrete beams shear‐strengthened with carbon fiber reinforced polymer strips in accordance with fib bulletin 14

Taki

Firouzi

Mohammadzadeh

2018

Structural Concrete

View full text Add to dashboard Cite

The results of time‐variant reliability analysis of shear‐strengthened reinforced concrete (RC) beams with externally bonded fiber‐reinforced polymer (FRP) are presented with an emphasis on the effects of environmental harshness and effective design parameters. The effects of chloride‐induced pitting corrosion and FRP degradation are considered using Monte Carlo simulation to assess the influence of environmental deterioration on the fib 2001 limit states instead of applying design reduction factors. For the defined worked example, the proposed method specifies the remaining lifetime of the strengthened beam by considering a reasonable value for the target reliability index. With regard to the reliability index profiles, it is shown that chloride‐induced pitting corrosion has a greater effect on the shear capacity of strengthened beams than the degradation of the FRP. It was found that the FRP reinforcement ratio has a considerable effect on the governing failure mode; hence, it is important to calibrate the proposed safety verifications of fib bulletin 14 using sufficient experimental data for the relevant random variables in a reliability‐based context.

show abstract

“…[24,25]; it is necessary to perform a large number of measurements to obtain a good representation of the phenomenon. This is di cult to pursue in practice because experimental testing is expensive and time-consuming.…”

Section: Modeling Chloride Ingressmentioning

confidence: 99%

Stochastic improvement of inspection and maintenance of corroding reinforced concrete structures placed in unsaturated environments

Bastidas‐Arteaga

2012

Engineering Structures

View full text Add to dashboard Cite

show abstract

Reliability-based assessment of the effect of climatic conditions on the corrosion of RC structures subject to chloride ingress

Cited by 105 publications

References 24 publications

Computational modeling for predicting corrosion initiation in reinforced concrete structures

Computational modeling for predicting corrosion initiation in reinforced concrete structures

Life cycle reliability assessment of reinforced concrete beams shear‐strengthened with carbon fiber reinforced polymer strips in accordance with fib bulletin 14

Stochastic improvement of inspection and maintenance of corroding reinforced concrete structures placed in unsaturated environments

Contact Info

Product

Resources

About