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...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Vilnius Gediminas Technical University
2021-11-01
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| Series: | Journal of Civil Engineering and Management |
| Subjects: | |
| Online Access: | https://journals.vgtu.lt/index.php/JCEM/article/view/14905 |
| _version_ | 1818823949910278144 |
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| 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 |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-18T23:48:07Z |
| format | Article |
| id | doaj.art-370bd1198ee94f4f8b56dbd55e147b8a |
| institution | Directory Open Access Journal |
| issn | 1392-3730 1822-3605 |
| language | English |
| last_indexed | 2024-12-18T23:48:07Z |
| publishDate | 2021-11-01 |
| publisher | Vilnius Gediminas Technical University |
| record_format | Article |
| series | Journal of Civil Engineering and Management |
| spelling | doaj.art-370bd1198ee94f4f8b56dbd55e147b8a2022-12-21T20:47:08ZengVilnius Gediminas Technical UniversityJournal of Civil Engineering and Management1392-37301822-36052021-11-0127863765010.3846/jcem.2021.1490514905Combining EBR CFRP sheet with prestressed NSM steel strands to enhance the structural behavior of prestressed concrete beamsM. Obaydullah0Mohd Zamin Jumaat1U. Johnson Alengaram2Md. Humayun Kabir3Muhammad Harunur Rashid4Centre for Innovative Construction Technology (CICT), Department of Civil Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, MalaysiaCentre for Innovative Construction Technology (CICT), Department of Civil Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, MalaysiaCentre for Innovative Construction Technology (CICT), Department of Civil Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, MalaysiaDepartment of Civil Engineering, Khulna University of Engineering and Technology, Khulna, BangladeshDepartment of Civil Engineering, Khulna University of Engineering and Technology, Khulna, BangladeshIn 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.https://journals.vgtu.lt/index.php/JCEM/article/view/14905prestressed beamsflexural behaviorebrnsmpnsmcombined techniquecebnsmcebpnsmprestressed strengtheningfem |
| spellingShingle | 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 Journal of Civil Engineering and Management prestressed beams flexural behavior ebr nsm pnsm combined technique cebnsm cebpnsm prestressed strengthening fem |
| title | 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_short | 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 |
| topic | prestressed beams flexural behavior ebr nsm pnsm combined technique cebnsm cebpnsm prestressed strengthening fem |
| url | https://journals.vgtu.lt/index.php/JCEM/article/view/14905 |
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