Combining EBR CFRP sheet with prestressed NSM steel strands to enhance the structural behavior of prestressed concrete beams

In this study, a combined strengthening technique is used to improve the flexural performance of prestressed concrete beams using CFRP sheets as EBR and prestressed steel strands as NSM. Seven prestressed beams were tested under four-point loading with one control specimen, one EBR CFRP sheet streng...

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Autores principales:	M. Obaydullah, Mohd Zamin Jumaat, U. Johnson Alengaram, Md. Humayun Kabir, Muhammad Harunur Rashid
Formato:	article
Lenguaje:	EN
Publicado:	Vilnius Gediminas Technical University 2021
Materias:	prestressed beams flexural behavior ebr nsm pnsm combined technique cebnsm cebpnsm prestressed strengthening fem Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/370bd1198ee94f4f8b56dbd55e147b8a
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spelling	oai:doaj.org-article:370bd1198ee94f4f8b56dbd55e147b8a2021-11-23T14:19:06ZCombining EBR CFRP sheet with prestressed NSM steel strands to enhance the structural behavior of prestressed concrete beams1392-37301822-360510.3846/jcem.2021.14905https://doaj.org/article/370bd1198ee94f4f8b56dbd55e147b8a2021-11-01T00:00:00Zhttps://journals.vgtu.lt/index.php/JCEM/article/view/14905https://doaj.org/toc/1392-3730https://doaj.org/toc/1822-3605In this study, a combined strengthening technique is used to improve the flexural performance of prestressed concrete beams using CFRP sheets as EBR and prestressed steel strands as NSM. Seven prestressed beams were tested under four-point loading with one control specimen, one EBR CFRP sheet strengthened specimen, one NSM steel strand without prestress strengthened specimen and four specimens strengthened with a combination of EBR CFRP sheet and NSM steel strands prestressed from 0% to 70% of their tensile strength. The flexural responses and failure modes of the specimens were investigated and the variations due to the level of prestressing force in the PNSM steel strands were also assessed. A finite element model (FEM) was developed using ABAQUS to verify the flexural responses of the strengthened specimens. The test results revealed that the combined strengthening technique remarkably enhanced the flexural performance of the specimens. The serviceability, first crack, yield, and ultimate load capacities improved up to 44%, 49%, 55% and 70%, respectively when compared with the control specimen. The combined technique also ensured the flexural failure of the specimens with significant enhancement in stiffness and energy absorption. The results of the FEM model exhibited excellent agreement with the experimental results.M. ObaydullahMohd Zamin JumaatU. Johnson AlengaramMd. Humayun KabirMuhammad Harunur RashidVilnius Gediminas Technical Universityarticleprestressed beamsflexural behaviorebrnsmpnsmcombined techniquecebnsmcebpnsmprestressed strengtheningfemBuilding constructionTH1-9745ENJournal of Civil Engineering and Management, Vol 27, Iss 8, Pp 637-650 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	prestressed beams flexural behavior ebr nsm pnsm combined technique cebnsm cebpnsm prestressed strengthening fem Building construction TH1-9745
spellingShingle	prestressed beams flexural behavior ebr nsm pnsm combined technique cebnsm cebpnsm prestressed strengthening fem Building construction TH1-9745 M. Obaydullah Mohd Zamin Jumaat U. Johnson Alengaram Md. Humayun Kabir Muhammad Harunur Rashid Combining EBR CFRP sheet with prestressed NSM steel strands to enhance the structural behavior of prestressed concrete beams
description	In this study, a combined strengthening technique is used to improve the flexural performance of prestressed concrete beams using CFRP sheets as EBR and prestressed steel strands as NSM. Seven prestressed beams were tested under four-point loading with one control specimen, one EBR CFRP sheet strengthened specimen, one NSM steel strand without prestress strengthened specimen and four specimens strengthened with a combination of EBR CFRP sheet and NSM steel strands prestressed from 0% to 70% of their tensile strength. The flexural responses and failure modes of the specimens were investigated and the variations due to the level of prestressing force in the PNSM steel strands were also assessed. A finite element model (FEM) was developed using ABAQUS to verify the flexural responses of the strengthened specimens. The test results revealed that the combined strengthening technique remarkably enhanced the flexural performance of the specimens. The serviceability, first crack, yield, and ultimate load capacities improved up to 44%, 49%, 55% and 70%, respectively when compared with the control specimen. The combined technique also ensured the flexural failure of the specimens with significant enhancement in stiffness and energy absorption. The results of the FEM model exhibited excellent agreement with the experimental results.
format	article
author	M. Obaydullah Mohd Zamin Jumaat U. Johnson Alengaram Md. Humayun Kabir Muhammad Harunur Rashid
author_facet	M. Obaydullah Mohd Zamin Jumaat U. Johnson Alengaram Md. Humayun Kabir Muhammad Harunur Rashid
author_sort	M. Obaydullah
title	Combining EBR CFRP sheet with prestressed NSM steel strands to enhance the structural behavior of prestressed concrete beams
title_short	Combining EBR CFRP sheet with prestressed NSM steel strands to enhance the structural behavior of prestressed concrete beams
title_full	Combining EBR CFRP sheet with prestressed NSM steel strands to enhance the structural behavior of prestressed concrete beams
title_fullStr	Combining EBR CFRP sheet with prestressed NSM steel strands to enhance the structural behavior of prestressed concrete beams
title_full_unstemmed	Combining EBR CFRP sheet with prestressed NSM steel strands to enhance the structural behavior of prestressed concrete beams
title_sort	combining ebr cfrp sheet with prestressed nsm steel strands to enhance the structural behavior of prestressed concrete beams
publisher	Vilnius Gediminas Technical University
publishDate	2021
url	https://doaj.org/article/370bd1198ee94f4f8b56dbd55e147b8a
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Combining EBR CFRP sheet with prestressed NSM steel strands to enhance the structural behavior of prestressed concrete beams

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