Assessment of externally bounded fibre reinforced polymer strengthening reinforced concrete beams at elevated temperature using finite element modelling

Over the years, fibre reinforced polymer (FRP) had been found as one of the structural rehabilitation methods that widely used in infrastructures and buildings to strengthen and retrofit the reinforced concrete (RC) structural elements such as RC beams. However, the mechanical properties of FRP such...

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Main Author:	Ng, Chee Keong
Format:	Thesis
Language:	English
Published:	2020
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/86086/1/NgCheeKeongMSKA2020.pdf
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spelling	my-utm-ep.860862020-08-30T08:56:02Z Assessment of externally bounded fibre reinforced polymer strengthening reinforced concrete beams at elevated temperature using finite element modelling 2020 Ng, Chee Keong TA Engineering (General). Civil engineering (General) Over the years, fibre reinforced polymer (FRP) had been found as one of the structural rehabilitation methods that widely used in infrastructures and buildings to strengthen and retrofit the reinforced concrete (RC) structural elements such as RC beams. However, the mechanical properties of FRP such as strength and stiffness as well as the bonding interface between FRP and concrete will be badly deteriorated when exposed to high temperature. This study is to assess the thermal-structural behaviour of insulated FRP strengthened RC beam exposed to elevated temperature using numerical modelling ABAQUS. The proposed numerical model of 200mm x 300mm RC beam subjected to 2 hours standard fire time-dependent curve (ISO 834) had been validated with the experimental test data carried out by previous study. The validated numerical model then is used in parametric study to investigate the behaviour of fire damaged normal strength concrete (40MPa) and high strength concrete (60MPa)of reinforced concrete beam strengthened with FRP using various fire insulation thickness of 0mm, 12.5mm, 25mm and 40mm respectively. The result of steel characteristic strength reduction factor is compared with analytical using 500?C Isotherm methods. The parametric studies indicated that the fire insulation layer is essential to provide fire protection to the CFRP strengthened RC beams when exposed to elevated temperature. The insulation layer thickness of 25mm had been found to be the optimum thickness to be used as it is able to meet the criteria in term of temperature distribution, displacement requirement and retention of beam mechanical properties regardless the use of normal or high strength concrete. In conclusion, the numerical model developed using the FE software (ABAQUS) in this study is able to carry out assessment on the thermal-structural behaviour of the insulated CFRP-strengthened RC beams at elevated temperature. 2020 Thesis http://eprints.utm.my/id/eprint/86086/ http://eprints.utm.my/id/eprint/86086/1/NgCheeKeongMSKA2020.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:134170 masters Universiti Teknologi Malaysia, Faculty of Engineering - School of Civil Engineering Faculty of Engineering - School of Civil Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Ng, Chee Keong Assessment of externally bounded fibre reinforced polymer strengthening reinforced concrete beams at elevated temperature using finite element modelling
description	Over the years, fibre reinforced polymer (FRP) had been found as one of the structural rehabilitation methods that widely used in infrastructures and buildings to strengthen and retrofit the reinforced concrete (RC) structural elements such as RC beams. However, the mechanical properties of FRP such as strength and stiffness as well as the bonding interface between FRP and concrete will be badly deteriorated when exposed to high temperature. This study is to assess the thermal-structural behaviour of insulated FRP strengthened RC beam exposed to elevated temperature using numerical modelling ABAQUS. The proposed numerical model of 200mm x 300mm RC beam subjected to 2 hours standard fire time-dependent curve (ISO 834) had been validated with the experimental test data carried out by previous study. The validated numerical model then is used in parametric study to investigate the behaviour of fire damaged normal strength concrete (40MPa) and high strength concrete (60MPa)of reinforced concrete beam strengthened with FRP using various fire insulation thickness of 0mm, 12.5mm, 25mm and 40mm respectively. The result of steel characteristic strength reduction factor is compared with analytical using 500?C Isotherm methods. The parametric studies indicated that the fire insulation layer is essential to provide fire protection to the CFRP strengthened RC beams when exposed to elevated temperature. The insulation layer thickness of 25mm had been found to be the optimum thickness to be used as it is able to meet the criteria in term of temperature distribution, displacement requirement and retention of beam mechanical properties regardless the use of normal or high strength concrete. In conclusion, the numerical model developed using the FE software (ABAQUS) in this study is able to carry out assessment on the thermal-structural behaviour of the insulated CFRP-strengthened RC beams at elevated temperature.
format	Thesis
qualification_level	Master's degree
author	Ng, Chee Keong
author_facet	Ng, Chee Keong
author_sort	Ng, Chee Keong
title	Assessment of externally bounded fibre reinforced polymer strengthening reinforced concrete beams at elevated temperature using finite element modelling
title_short	Assessment of externally bounded fibre reinforced polymer strengthening reinforced concrete beams at elevated temperature using finite element modelling
title_full	Assessment of externally bounded fibre reinforced polymer strengthening reinforced concrete beams at elevated temperature using finite element modelling
title_fullStr	Assessment of externally bounded fibre reinforced polymer strengthening reinforced concrete beams at elevated temperature using finite element modelling
title_full_unstemmed	Assessment of externally bounded fibre reinforced polymer strengthening reinforced concrete beams at elevated temperature using finite element modelling
title_sort	assessment of externally bounded fibre reinforced polymer strengthening reinforced concrete beams at elevated temperature using finite element modelling
granting_institution	Universiti Teknologi Malaysia, Faculty of Engineering - School of Civil Engineering
granting_department	Faculty of Engineering - School of Civil Engineering
publishDate	2020
url	http://eprints.utm.my/id/eprint/86086/1/NgCheeKeongMSKA2020.pdf
_version_	1747818493027287040

Assessment of externally bounded fibre reinforced polymer strengthening reinforced concrete beams at elevated temperature using finite element modelling

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