Numerical modelling of the Concrete Beams Strengthened with externally bonded CFRP Fabrics at High Temperatures

The use of externally bonded fiber reinforced polymer (FRP) has been proven to be an effective and efficient method to strengthen deficient concrete components and structures. This paper presents numerical investigations on the de-bonding behavior of concrete beams strengthened with externally bonde...

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Autores principales:	mahmood naderi, Siamak Esmealizadeh
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2019
Materias:	cfrp numerical modelling high temperatures concrete beams plastic damage model Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/a067628264794e40950e037c5fb6a4fc
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spelling	oai:doaj.org-article:a067628264794e40950e037c5fb6a4fc2021-11-08T15:52:22ZNumerical modelling of the Concrete Beams Strengthened with externally bonded CFRP Fabrics at High Temperatures2476-39772538-261610.22065/jsce.2018.105927.1385https://doaj.org/article/a067628264794e40950e037c5fb6a4fc2019-11-01T00:00:00Zhttps://www.jsce.ir/article_61444_db0da91e7fb5a7cb0f5344781f2eb39c.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616The use of externally bonded fiber reinforced polymer (FRP) has been proven to be an effective and efficient method to strengthen deficient concrete components and structures. This paper presents numerical investigations on the de-bonding behavior of concrete beams strengthened with externally bonded CFRP fabrics, at elevated temperatures. The numerical study was carried out, using the commercial package, “Abaqus”, for finite element analysis. The simulation was validated against laboratory four point bending tests of nine plain concrete beams previously performed by the authors. The behavior of concrete beams with three different design concrete strength of 20, 30 and 40 MPa which were externally bonded by CFRP fabrics were investigated at -20, +20, +50 and +80 Degree Celsius. Linear elastic isotropic and orthotropic models were used for the CFRP layer and a cohesive bond model was used for the concrete – CFRP interface. A plastic damage model was also used for the concrete. In the finite element analysis, similar to the laboratory tests, the specimens were first heated up to the elevated temperatures, and then loaded up to failure. The results show good agreement with the experimental data, regarding the failure loads, load–displacement response, and crack patterns. The finite element results of thermal strains in CFRP and stresses in the concrete are also compared with the thermal strains and stresses, determined by the analytically models.mahmood naderiSiamak EsmealizadehIranian Society of Structrual Engineering (ISSE)articlecfrpnumerical modellinghigh temperaturesconcrete beamsplastic damage modelBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 6, Iss شماره 3, Pp 71-88 (2019)
institution	DOAJ
collection	DOAJ
language	FA
topic	cfrp numerical modelling high temperatures concrete beams plastic damage model Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	cfrp numerical modelling high temperatures concrete beams plastic damage model Bridge engineering TG1-470 Building construction TH1-9745 mahmood naderi Siamak Esmealizadeh Numerical modelling of the Concrete Beams Strengthened with externally bonded CFRP Fabrics at High Temperatures
description	The use of externally bonded fiber reinforced polymer (FRP) has been proven to be an effective and efficient method to strengthen deficient concrete components and structures. This paper presents numerical investigations on the de-bonding behavior of concrete beams strengthened with externally bonded CFRP fabrics, at elevated temperatures. The numerical study was carried out, using the commercial package, “Abaqus”, for finite element analysis. The simulation was validated against laboratory four point bending tests of nine plain concrete beams previously performed by the authors. The behavior of concrete beams with three different design concrete strength of 20, 30 and 40 MPa which were externally bonded by CFRP fabrics were investigated at -20, +20, +50 and +80 Degree Celsius. Linear elastic isotropic and orthotropic models were used for the CFRP layer and a cohesive bond model was used for the concrete – CFRP interface. A plastic damage model was also used for the concrete. In the finite element analysis, similar to the laboratory tests, the specimens were first heated up to the elevated temperatures, and then loaded up to failure. The results show good agreement with the experimental data, regarding the failure loads, load–displacement response, and crack patterns. The finite element results of thermal strains in CFRP and stresses in the concrete are also compared with the thermal strains and stresses, determined by the analytically models.
format	article
author	mahmood naderi Siamak Esmealizadeh
author_facet	mahmood naderi Siamak Esmealizadeh
author_sort	mahmood naderi
title	Numerical modelling of the Concrete Beams Strengthened with externally bonded CFRP Fabrics at High Temperatures
title_short	Numerical modelling of the Concrete Beams Strengthened with externally bonded CFRP Fabrics at High Temperatures
title_full	Numerical modelling of the Concrete Beams Strengthened with externally bonded CFRP Fabrics at High Temperatures
title_fullStr	Numerical modelling of the Concrete Beams Strengthened with externally bonded CFRP Fabrics at High Temperatures
title_full_unstemmed	Numerical modelling of the Concrete Beams Strengthened with externally bonded CFRP Fabrics at High Temperatures
title_sort	numerical modelling of the concrete beams strengthened with externally bonded cfrp fabrics at high temperatures
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2019
url	https://doaj.org/article/a067628264794e40950e037c5fb6a4fc
work_keys_str_mv	AT mahmoodnaderi numericalmodellingoftheconcretebeamsstrengthenedwithexternallybondedcfrpfabricsathightemperatures AT siamakesmealizadeh numericalmodellingoftheconcretebeamsstrengthenedwithexternallybondedcfrpfabricsathightemperatures
_version_	1718441689918472192

Numerical modelling of the Concrete Beams Strengthened with externally bonded CFRP Fabrics at High Temperatures

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