MECHANICAL AND RELIABILITY ANALYSES OF REINFORCED CONCRETE STRUCTURES SUBJECTED TO CORROSIVE EFFECTS CAUSED BY CHLORIDE IONS PENETRATION
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://hdl.handle.net/11449/161775 |
Resumo: | Structural durability is an important design criterion, which must be assessed for every type of structure. In this regard, especial attention must be addressed to the durability of reinforced concrete (RC) structures. When RC structures are located in aggressive environments, its durability is strongly reduced by physical/chemical/mechanical processes that trigger the corrosion of reinforcements. Among these processes, the diffusion of chlorides is recognized as one of major responsible of corrosion phenomenon start. Reinforcements' depassivation occurs when the chloride concentration at the reinforcement surface reaches a threshold value. Consequently, geometrical structural shape and mechanical proprieties of constituent steel are modified. The present work presents a formulation based on the Finite Element Method for the mechanical analysis of reinforced concrete structures subjected to corrosive effects due to chloride penetration. Mazars's damage model and elastoplastic positive isotropic hardening approach are used to simulate physical nonlinearities of concrete and steel, respectively. Fick's second law is used to model the chloride diffusion inside the structure and empirical laws are applied to represent the corrosion rate of reinforcements' steel along time. The corrosion phenomena, as well as the mechanical proprieties of reinforced concrete, have a high level of randomness. Therefore, this problem is only properly addressed in the probabilistic context. Then, a polynomial response surface meta-model is built from the original mechanical model in order to represent the limit state equations. Monte Carlo's Simulation Method is applied on the obtained limit state equation to determinate the failure probability. Hyper-static structures are analysed in order to determine the probabilityof structural system failure, which is the main contribution of this study. Beams, localized in a saturated chloride environment, subjected to self-weigh and accidental loads are considered. The obtained results indicate that the progressive structural collapse due to corrosion is considerable different from the classical scenario when this chemical effect is not accounted. |
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MECHANICAL AND RELIABILITY ANALYSES OF REINFORCED CONCRETE STRUCTURES SUBJECTED TO CORROSIVE EFFECTS CAUSED BY CHLORIDE IONS PENETRATIONMazars' damage modelFick's second lawReinforcements' corrosionProgressive collapseStructural durability is an important design criterion, which must be assessed for every type of structure. In this regard, especial attention must be addressed to the durability of reinforced concrete (RC) structures. When RC structures are located in aggressive environments, its durability is strongly reduced by physical/chemical/mechanical processes that trigger the corrosion of reinforcements. Among these processes, the diffusion of chlorides is recognized as one of major responsible of corrosion phenomenon start. Reinforcements' depassivation occurs when the chloride concentration at the reinforcement surface reaches a threshold value. Consequently, geometrical structural shape and mechanical proprieties of constituent steel are modified. The present work presents a formulation based on the Finite Element Method for the mechanical analysis of reinforced concrete structures subjected to corrosive effects due to chloride penetration. Mazars's damage model and elastoplastic positive isotropic hardening approach are used to simulate physical nonlinearities of concrete and steel, respectively. Fick's second law is used to model the chloride diffusion inside the structure and empirical laws are applied to represent the corrosion rate of reinforcements' steel along time. The corrosion phenomena, as well as the mechanical proprieties of reinforced concrete, have a high level of randomness. Therefore, this problem is only properly addressed in the probabilistic context. Then, a polynomial response surface meta-model is built from the original mechanical model in order to represent the limit state equations. Monte Carlo's Simulation Method is applied on the obtained limit state equation to determinate the failure probability. Hyper-static structures are analysed in order to determine the probabilityof structural system failure, which is the main contribution of this study. Beams, localized in a saturated chloride environment, subjected to self-weigh and accidental loads are considered. The obtained results indicate that the progressive structural collapse due to corrosion is considerable different from the classical scenario when this chemical effect is not accounted.Univ Sao Paulo, Sch Engn Sao Carlos, Struct Engn, Dept Struct Engn, Ave Trabalhador Sao Carlense 400, BR-13566590 Sao Carlos, SP, BrazilUniv Sao Paulo, Sch Engn Sao Carlos, Dept Struct Engn, BR-13566590 Sao Carlos, SP, BrazilSao Paulo State Univ, Dept Civil & Environm Engn, BR-17033360 Bauru, SP, BrazilSao Paulo State Univ, Dept Civil & Environm Engn, BR-17033360 Bauru, SP, BrazilInt Center Numerical Methods EngineeringUniversidade de São Paulo (USP)Universidade Estadual Paulista (Unesp)Pellizzer, Giovanni P.Leonel, Edson D.Nogueira, Caio G. [UNESP]Idelsohn, SRSonzogni, VCoutinho, A.Cruchaga, M.Lew, A.Cerrolaza, M.2018-11-26T16:48:33Z2018-11-26T16:48:33Z2015-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject1245-1256Proceedings Of The 1st Pan-american Congress On Computational Mechanics And Xi Argentine Congress On Computational Mechanics. 08034 Barcelona: Int Center Numerical Methods Engineering, p. 1245-1256, 2015.http://hdl.handle.net/11449/161775WOS:000380586300114Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengProceedings Of The 1st Pan-american Congress On Computational Mechanics And Xi Argentine Congress On Computational Mechanicsinfo:eu-repo/semantics/openAccess2024-06-28T12:56:52Zoai:repositorio.unesp.br:11449/161775Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T17:35:57.107514Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
MECHANICAL AND RELIABILITY ANALYSES OF REINFORCED CONCRETE STRUCTURES SUBJECTED TO CORROSIVE EFFECTS CAUSED BY CHLORIDE IONS PENETRATION |
title |
MECHANICAL AND RELIABILITY ANALYSES OF REINFORCED CONCRETE STRUCTURES SUBJECTED TO CORROSIVE EFFECTS CAUSED BY CHLORIDE IONS PENETRATION |
spellingShingle |
MECHANICAL AND RELIABILITY ANALYSES OF REINFORCED CONCRETE STRUCTURES SUBJECTED TO CORROSIVE EFFECTS CAUSED BY CHLORIDE IONS PENETRATION Pellizzer, Giovanni P. Mazars' damage model Fick's second law Reinforcements' corrosion Progressive collapse |
title_short |
MECHANICAL AND RELIABILITY ANALYSES OF REINFORCED CONCRETE STRUCTURES SUBJECTED TO CORROSIVE EFFECTS CAUSED BY CHLORIDE IONS PENETRATION |
title_full |
MECHANICAL AND RELIABILITY ANALYSES OF REINFORCED CONCRETE STRUCTURES SUBJECTED TO CORROSIVE EFFECTS CAUSED BY CHLORIDE IONS PENETRATION |
title_fullStr |
MECHANICAL AND RELIABILITY ANALYSES OF REINFORCED CONCRETE STRUCTURES SUBJECTED TO CORROSIVE EFFECTS CAUSED BY CHLORIDE IONS PENETRATION |
title_full_unstemmed |
MECHANICAL AND RELIABILITY ANALYSES OF REINFORCED CONCRETE STRUCTURES SUBJECTED TO CORROSIVE EFFECTS CAUSED BY CHLORIDE IONS PENETRATION |
title_sort |
MECHANICAL AND RELIABILITY ANALYSES OF REINFORCED CONCRETE STRUCTURES SUBJECTED TO CORROSIVE EFFECTS CAUSED BY CHLORIDE IONS PENETRATION |
author |
Pellizzer, Giovanni P. |
author_facet |
Pellizzer, Giovanni P. Leonel, Edson D. Nogueira, Caio G. [UNESP] Idelsohn, SR Sonzogni, V Coutinho, A. Cruchaga, M. Lew, A. Cerrolaza, M. |
author_role |
author |
author2 |
Leonel, Edson D. Nogueira, Caio G. [UNESP] Idelsohn, SR Sonzogni, V Coutinho, A. Cruchaga, M. Lew, A. Cerrolaza, M. |
author2_role |
author author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade de São Paulo (USP) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Pellizzer, Giovanni P. Leonel, Edson D. Nogueira, Caio G. [UNESP] Idelsohn, SR Sonzogni, V Coutinho, A. Cruchaga, M. Lew, A. Cerrolaza, M. |
dc.subject.por.fl_str_mv |
Mazars' damage model Fick's second law Reinforcements' corrosion Progressive collapse |
topic |
Mazars' damage model Fick's second law Reinforcements' corrosion Progressive collapse |
description |
Structural durability is an important design criterion, which must be assessed for every type of structure. In this regard, especial attention must be addressed to the durability of reinforced concrete (RC) structures. When RC structures are located in aggressive environments, its durability is strongly reduced by physical/chemical/mechanical processes that trigger the corrosion of reinforcements. Among these processes, the diffusion of chlorides is recognized as one of major responsible of corrosion phenomenon start. Reinforcements' depassivation occurs when the chloride concentration at the reinforcement surface reaches a threshold value. Consequently, geometrical structural shape and mechanical proprieties of constituent steel are modified. The present work presents a formulation based on the Finite Element Method for the mechanical analysis of reinforced concrete structures subjected to corrosive effects due to chloride penetration. Mazars's damage model and elastoplastic positive isotropic hardening approach are used to simulate physical nonlinearities of concrete and steel, respectively. Fick's second law is used to model the chloride diffusion inside the structure and empirical laws are applied to represent the corrosion rate of reinforcements' steel along time. The corrosion phenomena, as well as the mechanical proprieties of reinforced concrete, have a high level of randomness. Therefore, this problem is only properly addressed in the probabilistic context. Then, a polynomial response surface meta-model is built from the original mechanical model in order to represent the limit state equations. Monte Carlo's Simulation Method is applied on the obtained limit state equation to determinate the failure probability. Hyper-static structures are analysed in order to determine the probabilityof structural system failure, which is the main contribution of this study. Beams, localized in a saturated chloride environment, subjected to self-weigh and accidental loads are considered. The obtained results indicate that the progressive structural collapse due to corrosion is considerable different from the classical scenario when this chemical effect is not accounted. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-01-01 2018-11-26T16:48:33Z 2018-11-26T16:48:33Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Proceedings Of The 1st Pan-american Congress On Computational Mechanics And Xi Argentine Congress On Computational Mechanics. 08034 Barcelona: Int Center Numerical Methods Engineering, p. 1245-1256, 2015. http://hdl.handle.net/11449/161775 WOS:000380586300114 |
identifier_str_mv |
Proceedings Of The 1st Pan-american Congress On Computational Mechanics And Xi Argentine Congress On Computational Mechanics. 08034 Barcelona: Int Center Numerical Methods Engineering, p. 1245-1256, 2015. WOS:000380586300114 |
url |
http://hdl.handle.net/11449/161775 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Proceedings Of The 1st Pan-american Congress On Computational Mechanics And Xi Argentine Congress On Computational Mechanics |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1245-1256 |
dc.publisher.none.fl_str_mv |
Int Center Numerical Methods Engineering |
publisher.none.fl_str_mv |
Int Center Numerical Methods Engineering |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128833147109376 |