Theoretical and experimental assessment of the effect of adhesive bond thickness on the flexural capacity of CFRP strengthened beams
Carbon Fiber Reinforced Polymer (CFRP) is a material of choice in the structural strengthening of reinforced concrete (RC) elements. In order to strengthen RC elements, CRFP is bonded externally to RC elements using adhesives. This paper investigates the effect of varying adhesive bond thickness o...
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| Format: | Article |
| Language: | English |
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CAN THO UNIVERSITY PUBLISHING HOUSE
2023-07-01
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| Series: | Can Tho University Journal of Science |
| Subjects: | |
| Online Access: | https://ctujs.ctu.edu.vn/index.php/ctujs/article/view/620 |
| _version_ | 1797777258052583424 |
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| author | Ebuka Nwankwo TrustGod John |
| author_facet | Ebuka Nwankwo TrustGod John |
| author_sort | Ebuka Nwankwo |
| collection | DOAJ |
| description |
Carbon Fiber Reinforced Polymer (CFRP) is a material of choice in the structural strengthening of reinforced concrete (RC) elements. In order to strengthen RC elements, CRFP is bonded externally to RC elements using adhesives. This paper investigates the effect of varying adhesive bond thickness on the moment capacity of CFRP strengthened RC beams in flexure. Thirty-eight (38) Reinforced concrete beams (1.2m length) were cast in the laboratory and their failure loads and corresponding moment capacities obtained when the adhesive bond thickness between the CFRP wraps and RC beams were varied. This paper examines the comparison between flexural moment capacities obtained experimentally and the predicted moment capacities using a theoretical procedure set out in AC440-2R-17 after structural strengthening with CFRP. It was observed that the adhesive thickness had a significant effect on the flexural capacity of strengthened beams. As the adhesive thickness increased beyond certain thresholds, the flexural capacity of strengthened beams reduced. At the optimum adhesive thickness threshold, the ACI 440-2r-17 procedures could predict to high accuracy the moment capacities of strengthened beams.
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| first_indexed | 2024-03-12T23:01:34Z |
| format | Article |
| id | doaj.art-3ab7cb16e46843abb8886b4805425f02 |
| institution | Directory Open Access Journal |
| issn | 2615-9422 2815-5602 |
| language | English |
| last_indexed | 2024-03-12T23:01:34Z |
| publishDate | 2023-07-01 |
| publisher | CAN THO UNIVERSITY PUBLISHING HOUSE |
| record_format | Article |
| series | Can Tho University Journal of Science |
| spelling | doaj.art-3ab7cb16e46843abb8886b4805425f022023-07-19T08:52:53ZengCAN THO UNIVERSITY PUBLISHING HOUSECan Tho University Journal of Science2615-94222815-56022023-07-0115210.22144/ctu.jen.2023.028Theoretical and experimental assessment of the effect of adhesive bond thickness on the flexural capacity of CFRP strengthened beamsEbuka Nwankwo0TrustGod John1a:1:{s:5:"en_US";s:52:"Department of Civil Engineering, University of Benin";}Department of Civil Engineering, Niger Delta University, Bayelsa State, Nigeria Carbon Fiber Reinforced Polymer (CFRP) is a material of choice in the structural strengthening of reinforced concrete (RC) elements. In order to strengthen RC elements, CRFP is bonded externally to RC elements using adhesives. This paper investigates the effect of varying adhesive bond thickness on the moment capacity of CFRP strengthened RC beams in flexure. Thirty-eight (38) Reinforced concrete beams (1.2m length) were cast in the laboratory and their failure loads and corresponding moment capacities obtained when the adhesive bond thickness between the CFRP wraps and RC beams were varied. This paper examines the comparison between flexural moment capacities obtained experimentally and the predicted moment capacities using a theoretical procedure set out in AC440-2R-17 after structural strengthening with CFRP. It was observed that the adhesive thickness had a significant effect on the flexural capacity of strengthened beams. As the adhesive thickness increased beyond certain thresholds, the flexural capacity of strengthened beams reduced. At the optimum adhesive thickness threshold, the ACI 440-2r-17 procedures could predict to high accuracy the moment capacities of strengthened beams. https://ctujs.ctu.edu.vn/index.php/ctujs/article/view/620CFRP, Beam, Experimental, Flexural, Shear and Bending |
| spellingShingle | Ebuka Nwankwo TrustGod John Theoretical and experimental assessment of the effect of adhesive bond thickness on the flexural capacity of CFRP strengthened beams Can Tho University Journal of Science CFRP, Beam, Experimental, Flexural, Shear and Bending |
| title | Theoretical and experimental assessment of the effect of adhesive bond thickness on the flexural capacity of CFRP strengthened beams |
| title_full | Theoretical and experimental assessment of the effect of adhesive bond thickness on the flexural capacity of CFRP strengthened beams |
| title_fullStr | Theoretical and experimental assessment of the effect of adhesive bond thickness on the flexural capacity of CFRP strengthened beams |
| title_full_unstemmed | Theoretical and experimental assessment of the effect of adhesive bond thickness on the flexural capacity of CFRP strengthened beams |
| title_short | Theoretical and experimental assessment of the effect of adhesive bond thickness on the flexural capacity of CFRP strengthened beams |
| title_sort | theoretical and experimental assessment of the effect of adhesive bond thickness on the flexural capacity of cfrp strengthened beams |
| topic | CFRP, Beam, Experimental, Flexural, Shear and Bending |
| url | https://ctujs.ctu.edu.vn/index.php/ctujs/article/view/620 |
| work_keys_str_mv | AT ebukanwankwo theoreticalandexperimentalassessmentoftheeffectofadhesivebondthicknessontheflexuralcapacityofcfrpstrengthenedbeams AT trustgodjohn theoreticalandexperimentalassessmentoftheeffectofadhesivebondthicknessontheflexuralcapacityofcfrpstrengthenedbeams |