Influence of the reinforcement corrosion on the bending moment capacity of reinforced concrete beams: a structural reliability approach

Detalhes bibliográficos
Autor(a) principal: Liberati,E. A. P.
Data de Publicação: 2014
Outros Autores: Leonel,E. D., Nogueira,C. G.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Revista IBRACON de Estruturas e Materiais
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952014000300005
Resumo: Reinforced concrete structures are, certainly, one of the most used types of structure around world. When it is located in non-aggressive environments, it respects, in general, the structural life predicted. Unless the structure be used improperly. However, the durability of these structures is strongly connected to degradation processes whose origin is environmental and/or functional. Among these processes, it is worth to mention those related to corrosion of reinforcements. The reinforcement's corrosion is directly related to the durability and safety of concrete structures. Moreover, the chlorides diffusion is recognized as one of major factors that triggers the corrosion. Therefore, at modelling accurately the chloride diffusion, the corrosion of reinforcements can be better evaluated. Consequently, design criteria can be more realistically proposed in order to assure safety and economy into reinforced concrete structures. Due to the inherent randomness present on chloride diffusion and corrosion, these phenomena can only be properly modelled considering probabilistic approaches. In this paper, the durability of a beam designed using the criteria proposed by ABNT NBR 6118:2003 [1] is assessed using probabilistic approaches. The corrosion time initiation is determined using Fick's diffusion law whereas Faraday's corrosion laws are adopted to model the steel loss. The probability of structural failure is determined using Monte Carlo simulation. The mentioned beam is analysed considering different failure scenarios in order to study the influence of water/cement ratio and environmental aggressiveness on the probability of failure. Based on these results, some remarks are performed considering NBR recommendations and the real probability of failure.
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spelling Influence of the reinforcement corrosion on the bending moment capacity of reinforced concrete beams: a structural reliability approachcorrosion of reinforcementreinforced concreteFick's second lawFaradays's lawsReinforced concrete structures are, certainly, one of the most used types of structure around world. When it is located in non-aggressive environments, it respects, in general, the structural life predicted. Unless the structure be used improperly. However, the durability of these structures is strongly connected to degradation processes whose origin is environmental and/or functional. Among these processes, it is worth to mention those related to corrosion of reinforcements. The reinforcement's corrosion is directly related to the durability and safety of concrete structures. Moreover, the chlorides diffusion is recognized as one of major factors that triggers the corrosion. Therefore, at modelling accurately the chloride diffusion, the corrosion of reinforcements can be better evaluated. Consequently, design criteria can be more realistically proposed in order to assure safety and economy into reinforced concrete structures. Due to the inherent randomness present on chloride diffusion and corrosion, these phenomena can only be properly modelled considering probabilistic approaches. In this paper, the durability of a beam designed using the criteria proposed by ABNT NBR 6118:2003 [1] is assessed using probabilistic approaches. The corrosion time initiation is determined using Fick's diffusion law whereas Faraday's corrosion laws are adopted to model the steel loss. The probability of structural failure is determined using Monte Carlo simulation. The mentioned beam is analysed considering different failure scenarios in order to study the influence of water/cement ratio and environmental aggressiveness on the probability of failure. Based on these results, some remarks are performed considering NBR recommendations and the real probability of failure.IBRACON - Instituto Brasileiro do Concreto2014-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952014000300005Revista IBRACON de Estruturas e Materiais v.7 n.3 2014reponame:Revista IBRACON de Estruturas e Materiaisinstname:Instituto Brasileiro do Concreto (IBRACON)instacron:IBRACON10.1590/S1983-41952014000300005info:eu-repo/semantics/openAccessLiberati,E. A. P.Leonel,E. D.Nogueira,C. G.eng2014-06-13T00:00:00Zoai:scielo:S1983-41952014000300005Revistahttp://www.revistas.ibracon.org.br/index.php/riemhttps://old.scielo.br/oai/scielo-oai.phpeditores.riem@gmail.com||arlene@ibracon.org.br1983-41951983-4195opendoar:2014-06-13T00:00Revista IBRACON de Estruturas e Materiais - Instituto Brasileiro do Concreto (IBRACON)false
dc.title.none.fl_str_mv Influence of the reinforcement corrosion on the bending moment capacity of reinforced concrete beams: a structural reliability approach
title Influence of the reinforcement corrosion on the bending moment capacity of reinforced concrete beams: a structural reliability approach
spellingShingle Influence of the reinforcement corrosion on the bending moment capacity of reinforced concrete beams: a structural reliability approach
Liberati,E. A. P.
corrosion of reinforcement
reinforced concrete
Fick's second law
Faradays's laws
title_short Influence of the reinforcement corrosion on the bending moment capacity of reinforced concrete beams: a structural reliability approach
title_full Influence of the reinforcement corrosion on the bending moment capacity of reinforced concrete beams: a structural reliability approach
title_fullStr Influence of the reinforcement corrosion on the bending moment capacity of reinforced concrete beams: a structural reliability approach
title_full_unstemmed Influence of the reinforcement corrosion on the bending moment capacity of reinforced concrete beams: a structural reliability approach
title_sort Influence of the reinforcement corrosion on the bending moment capacity of reinforced concrete beams: a structural reliability approach
author Liberati,E. A. P.
author_facet Liberati,E. A. P.
Leonel,E. D.
Nogueira,C. G.
author_role author
author2 Leonel,E. D.
Nogueira,C. G.
author2_role author
author
dc.contributor.author.fl_str_mv Liberati,E. A. P.
Leonel,E. D.
Nogueira,C. G.
dc.subject.por.fl_str_mv corrosion of reinforcement
reinforced concrete
Fick's second law
Faradays's laws
topic corrosion of reinforcement
reinforced concrete
Fick's second law
Faradays's laws
description Reinforced concrete structures are, certainly, one of the most used types of structure around world. When it is located in non-aggressive environments, it respects, in general, the structural life predicted. Unless the structure be used improperly. However, the durability of these structures is strongly connected to degradation processes whose origin is environmental and/or functional. Among these processes, it is worth to mention those related to corrosion of reinforcements. The reinforcement's corrosion is directly related to the durability and safety of concrete structures. Moreover, the chlorides diffusion is recognized as one of major factors that triggers the corrosion. Therefore, at modelling accurately the chloride diffusion, the corrosion of reinforcements can be better evaluated. Consequently, design criteria can be more realistically proposed in order to assure safety and economy into reinforced concrete structures. Due to the inherent randomness present on chloride diffusion and corrosion, these phenomena can only be properly modelled considering probabilistic approaches. In this paper, the durability of a beam designed using the criteria proposed by ABNT NBR 6118:2003 [1] is assessed using probabilistic approaches. The corrosion time initiation is determined using Fick's diffusion law whereas Faraday's corrosion laws are adopted to model the steel loss. The probability of structural failure is determined using Monte Carlo simulation. The mentioned beam is analysed considering different failure scenarios in order to study the influence of water/cement ratio and environmental aggressiveness on the probability of failure. Based on these results, some remarks are performed considering NBR recommendations and the real probability of failure.
publishDate 2014
dc.date.none.fl_str_mv 2014-06-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952014000300005
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dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1983-41952014000300005
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dc.publisher.none.fl_str_mv IBRACON - Instituto Brasileiro do Concreto
publisher.none.fl_str_mv IBRACON - Instituto Brasileiro do Concreto
dc.source.none.fl_str_mv Revista IBRACON de Estruturas e Materiais v.7 n.3 2014
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repository.name.fl_str_mv Revista IBRACON de Estruturas e Materiais - Instituto Brasileiro do Concreto (IBRACON)
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