Deformation capacity of shear-strengthened concrete beams reinforced with FRP bars: Experimental and analytical investigations
This paper presents an analytical model, which was developed based on the variable angle truss, to estimate the shear deformations of fiber-reinforced polymer (FRP) reinforced concrete beams strengthened in shear. The influences of the strengthening system in enhancing the shear strength and shear s...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509522005435 |
| _version_ | 1811308722424643584 |
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| author | Cao Thanh Ngoc Tran Xuan Huy Nguyen Dang Dung Le Huy Cuong Nguyen |
| author_facet | Cao Thanh Ngoc Tran Xuan Huy Nguyen Dang Dung Le Huy Cuong Nguyen |
| author_sort | Cao Thanh Ngoc Tran |
| collection | DOAJ |
| description | This paper presents an analytical model, which was developed based on the variable angle truss, to estimate the shear deformations of fiber-reinforced polymer (FRP) reinforced concrete beams strengthened in shear. The influences of the strengthening system in enhancing the shear strength and shear stiffness of the strengthened beams are considered in the proposed model. The proposed shear deformation is then incorporated into the deflection approach recommended in ACI 440.1 R (2015) to calculate the total deformation of beams. The developed model is validated with the available experimental results of shear-strengthened specimens. The obtained ratio between analytical and experimental deformations and its corresponding standard of deviation at service loads are 1.075 and 0.123, respectively. A test program comprising eight specimens with different aspect ratios strengthened in shear by carbon FRP (CFRP) laminates is conducted to further verify the proposed model. Three groups of tested specimens with aspect ratios of 1.7, 2.3, and 2.8 are enhanced in shear by two U-wrapping CFRP shear strengthening techniques, namely continuous sheets, and 50 mm strips at 100 mm spacings. The experimental results indicate that the proposed model predicts accurately the load-displacement curves and deformations at service loads of the tested beams. The obtained average ratios of analytical over experimental deformations at the service loads ranged from 1.061 to 1.075. |
| first_indexed | 2024-04-13T09:28:24Z |
| format | Article |
| id | doaj.art-f97284a1fe9f4540862cea1c2a83a017 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-04-13T09:28:24Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-f97284a1fe9f4540862cea1c2a83a0172022-12-22T02:52:22ZengElsevierCase Studies in Construction Materials2214-50952022-12-0117e01411Deformation capacity of shear-strengthened concrete beams reinforced with FRP bars: Experimental and analytical investigationsCao Thanh Ngoc Tran0Xuan Huy Nguyen1Dang Dung Le2Huy Cuong Nguyen3Department of Civil Engineering, International University, Vietnam National University Hochiminh City, Viet Nam; Vietnam National University Hochiminh City, Viet NamFaculty of Construction Engineering, University of Transport and Communications, Viet NamFaculty of Construction Engineering, University of Transport and Communications, Viet NamFaculty of Construction Engineering, University of Transport and Communications, Viet Nam; Corresponding author.This paper presents an analytical model, which was developed based on the variable angle truss, to estimate the shear deformations of fiber-reinforced polymer (FRP) reinforced concrete beams strengthened in shear. The influences of the strengthening system in enhancing the shear strength and shear stiffness of the strengthened beams are considered in the proposed model. The proposed shear deformation is then incorporated into the deflection approach recommended in ACI 440.1 R (2015) to calculate the total deformation of beams. The developed model is validated with the available experimental results of shear-strengthened specimens. The obtained ratio between analytical and experimental deformations and its corresponding standard of deviation at service loads are 1.075 and 0.123, respectively. A test program comprising eight specimens with different aspect ratios strengthened in shear by carbon FRP (CFRP) laminates is conducted to further verify the proposed model. Three groups of tested specimens with aspect ratios of 1.7, 2.3, and 2.8 are enhanced in shear by two U-wrapping CFRP shear strengthening techniques, namely continuous sheets, and 50 mm strips at 100 mm spacings. The experimental results indicate that the proposed model predicts accurately the load-displacement curves and deformations at service loads of the tested beams. The obtained average ratios of analytical over experimental deformations at the service loads ranged from 1.061 to 1.075.http://www.sciencedirect.com/science/article/pii/S2214509522005435FRPShear strengtheningDeformationAnalytical modelExperiment |
| spellingShingle | Cao Thanh Ngoc Tran Xuan Huy Nguyen Dang Dung Le Huy Cuong Nguyen Deformation capacity of shear-strengthened concrete beams reinforced with FRP bars: Experimental and analytical investigations Case Studies in Construction Materials FRP Shear strengthening Deformation Analytical model Experiment |
| title | Deformation capacity of shear-strengthened concrete beams reinforced with FRP bars: Experimental and analytical investigations |
| title_full | Deformation capacity of shear-strengthened concrete beams reinforced with FRP bars: Experimental and analytical investigations |
| title_fullStr | Deformation capacity of shear-strengthened concrete beams reinforced with FRP bars: Experimental and analytical investigations |
| title_full_unstemmed | Deformation capacity of shear-strengthened concrete beams reinforced with FRP bars: Experimental and analytical investigations |
| title_short | Deformation capacity of shear-strengthened concrete beams reinforced with FRP bars: Experimental and analytical investigations |
| title_sort | deformation capacity of shear strengthened concrete beams reinforced with frp bars experimental and analytical investigations |
| topic | FRP Shear strengthening Deformation Analytical model Experiment |
| url | http://www.sciencedirect.com/science/article/pii/S2214509522005435 |
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