Influences of current density on the spatial steel corrosion and reliability of corrosion-affected RC beams

研究成果: Conference contribution

抄録

Ignoring the effects of spatial variability of steel corrosion can lead to an error in the long-term performance assessment of RC structures. Recent research has been focusing on modelling spatial steel corrosion using experimental data from the corroded RC members by means of the impressed current method. However, researchers have applied a wide range of current density neglecting its effects on the spatial steel corrosion and the reliability of corrosion-affected RC beams. This paper aims to study effects of current density on the spatial steel corrosion and reliability of RC structural beam using finite element analysis. Three RC beams were corroded using current density of 50, 100, and 500 μA/cm2. The spatial growth in steel weight loss in RC specimens was quantified at different corrosion levels using X-ray and image processing techniques. It was found that low current density of 50 μA/cm2 induced more non-uniform steel corrosion than higher levels of current density. Gumbel distribution parameters were derived from the experimental results and used to approximately model the spatial steel corrosion. An illustrative example was provided to study the effect of the modelled steel corrosion associated with low and high current densities on the reliability analysis of a structural RC beam. It was found that the failure probability of the RC beam estimated using the modelled spatial steel corrosion associated with small current density was higher than that associated with high current density.

元の言語English
ホスト出版物のタイトルProceedings of the fib Symposium 2019
ホスト出版物のサブタイトルConcrete - Innovations in Materials, Design and Structures
編集者Wit Derkowski, Piotr Krajewski, Piotr Gwozdziewicz, Marek Pantak, Lukasz Hojdys
出版者International Federation for Structural Concrete
ページ2091-2097
ページ数7
ISBN(電子版)9782940643004
出版物ステータスPublished - 2019 1 1
イベントfib Symposium 2019: Concrete - Innovations in Materials, Design and Structures - Krakow, Poland
継続期間: 2019 5 272019 5 29

出版物シリーズ

名前Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures

Conference

Conferencefib Symposium 2019: Concrete - Innovations in Materials, Design and Structures
Poland
Krakow
期間19/5/2719/5/29

Fingerprint

Steel corrosion
Current density
Corrosion
Reliability analysis
Image processing
Finite element method
X rays
Steel

ASJC Scopus subject areas

  • Building and Construction
  • Architecture
  • Civil and Structural Engineering

これを引用

Lim, S., Zhang, M., & Akiyama, M. (2019). Influences of current density on the spatial steel corrosion and reliability of corrosion-affected RC beams. : W. Derkowski, P. Krajewski, P. Gwozdziewicz, M. Pantak, & L. Hojdys (版), Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures (pp. 2091-2097). (Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures). International Federation for Structural Concrete.

Influences of current density on the spatial steel corrosion and reliability of corrosion-affected RC beams. / Lim, Sopokhem; Zhang, Mingyang; Akiyama, Mitsuyoshi.

Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures. 版 / Wit Derkowski; Piotr Krajewski; Piotr Gwozdziewicz; Marek Pantak; Lukasz Hojdys. International Federation for Structural Concrete, 2019. p. 2091-2097 (Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures).

研究成果: Conference contribution

Lim, S, Zhang, M & Akiyama, M 2019, Influences of current density on the spatial steel corrosion and reliability of corrosion-affected RC beams. : W Derkowski, P Krajewski, P Gwozdziewicz, M Pantak & L Hojdys (版), Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures. Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures, International Federation for Structural Concrete, pp. 2091-2097, fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures, Krakow, Poland, 19/5/27.
Lim S, Zhang M, Akiyama M. Influences of current density on the spatial steel corrosion and reliability of corrosion-affected RC beams. : Derkowski W, Krajewski P, Gwozdziewicz P, Pantak M, Hojdys L, 編集者, Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures. International Federation for Structural Concrete. 2019. p. 2091-2097. (Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures).
Lim, Sopokhem ; Zhang, Mingyang ; Akiyama, Mitsuyoshi. / Influences of current density on the spatial steel corrosion and reliability of corrosion-affected RC beams. Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures. 編集者 / Wit Derkowski ; Piotr Krajewski ; Piotr Gwozdziewicz ; Marek Pantak ; Lukasz Hojdys. International Federation for Structural Concrete, 2019. pp. 2091-2097 (Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures).
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