An Experimental Investigation on the Improving the Bond Behavior of Glass Fiber Reinforced Polymer Bars in Concrete
The bond is considered one of the factors that plays an important role in the behavior of the reinforced concrete structural elements. In recent years, using the glass fiber reinforced polymer (GFRP) as an alternative to steel bars is needed to verify its performance in the structures. In this study...
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Faculty of Engineering, University of Kufa
2025-04-01
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| Series: | Mağallaẗ Al-kūfaẗ Al-handasiyyaẗ |
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| Online Access: | https://journal.uokufa.edu.iq/index.php/kje/article/view/16851 |
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| author | Nibras Khalid Muhaned Shallal Hanadi Naji Alaa Hasson |
| author_facet | Nibras Khalid Muhaned Shallal Hanadi Naji Alaa Hasson |
| author_sort | Nibras Khalid |
| collection | DOAJ |
| description | The bond is considered one of the factors that plays an important role in the behavior of the reinforced concrete structural elements. In recent years, using the glass fiber reinforced polymer (GFRP) as an alternative to steel bars is needed to verify its performance in the structures. In this study, the bond between the concrete and GFRP bars is investigated through using two different surface enhancement techniques (sand and steel fibers). Fourteen beam specimens were cast and tested considering three different parameters, concrete compressive strength (55 and 78 MPa), bar diameter size (6mm and 10 mm) and the surface scheme (non-coated, sand-coated and steel fiber-coated). The experimental work included the recording of the bond stress and corresponding slip. For a certain value of concrete grade and 6 mm bar diameter, the bond behavior improved by 206% and 198% for the sand-coated surface and steel fiber-coated bars as compared to non-coated bars, respectively. For the same bar size (6mm), the best enhancement in bond strength was found by (61%) for the non-coated surface when the concrete compressive strength increased from 55 to 78 MPa. The use of larger bar diameter for the same concrete compressive strength, the higher bond strength improvement was 55% for the non-coated surface bar. From the bond stress-slip curves, the tests indicate that when the surface of the GFRP bars is coated by sand, it will give the best enhancement in the bond strength. |
| format | Article |
| id | doaj-art-b2cde95670374ac3a166a659b4a3f738 |
| institution | OA Journals |
| issn | 2071-5528 2523-0018 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Faculty of Engineering, University of Kufa |
| record_format | Article |
| series | Mağallaẗ Al-kūfaẗ Al-handasiyyaẗ |
| spelling | doaj-art-b2cde95670374ac3a166a659b4a3f7382025-08-20T02:12:49ZengFaculty of Engineering, University of KufaMağallaẗ Al-kūfaẗ Al-handasiyyaẗ2071-55282523-00182025-04-011602819510.30572/2018/KJE/160205An Experimental Investigation on the Improving the Bond Behavior of Glass Fiber Reinforced Polymer Bars in ConcreteNibras Khalid0https://orcid.org/0000-0003-4661-7914Muhaned Shallal1Hanadi Naji2Alaa Hasson3Department of Civil Engineering, Mustansiriyah University, Baghdad, IraqDepartment of Civil Engineering, University of AlQadisiyah, Diwaniyah, IraqDepartment of Civil Engineering, Mustansiriyah University, Baghdad, IraqDepartment of Civil Engineering, University of AlQadisiyah, Diwaniyah, IraqThe bond is considered one of the factors that plays an important role in the behavior of the reinforced concrete structural elements. In recent years, using the glass fiber reinforced polymer (GFRP) as an alternative to steel bars is needed to verify its performance in the structures. In this study, the bond between the concrete and GFRP bars is investigated through using two different surface enhancement techniques (sand and steel fibers). Fourteen beam specimens were cast and tested considering three different parameters, concrete compressive strength (55 and 78 MPa), bar diameter size (6mm and 10 mm) and the surface scheme (non-coated, sand-coated and steel fiber-coated). The experimental work included the recording of the bond stress and corresponding slip. For a certain value of concrete grade and 6 mm bar diameter, the bond behavior improved by 206% and 198% for the sand-coated surface and steel fiber-coated bars as compared to non-coated bars, respectively. For the same bar size (6mm), the best enhancement in bond strength was found by (61%) for the non-coated surface when the concrete compressive strength increased from 55 to 78 MPa. The use of larger bar diameter for the same concrete compressive strength, the higher bond strength improvement was 55% for the non-coated surface bar. From the bond stress-slip curves, the tests indicate that when the surface of the GFRP bars is coated by sand, it will give the best enhancement in the bond strength.https://journal.uokufa.edu.iq/index.php/kje/article/view/16851bond behaviorgfrpsteel fibersbond-slip curvessurface coating |
| spellingShingle | Nibras Khalid Muhaned Shallal Hanadi Naji Alaa Hasson An Experimental Investigation on the Improving the Bond Behavior of Glass Fiber Reinforced Polymer Bars in Concrete Mağallaẗ Al-kūfaẗ Al-handasiyyaẗ bond behavior gfrp steel fibers bond-slip curves surface coating |
| title | An Experimental Investigation on the Improving the Bond Behavior of Glass Fiber Reinforced Polymer Bars in Concrete |
| title_full | An Experimental Investigation on the Improving the Bond Behavior of Glass Fiber Reinforced Polymer Bars in Concrete |
| title_fullStr | An Experimental Investigation on the Improving the Bond Behavior of Glass Fiber Reinforced Polymer Bars in Concrete |
| title_full_unstemmed | An Experimental Investigation on the Improving the Bond Behavior of Glass Fiber Reinforced Polymer Bars in Concrete |
| title_short | An Experimental Investigation on the Improving the Bond Behavior of Glass Fiber Reinforced Polymer Bars in Concrete |
| title_sort | experimental investigation on the improving the bond behavior of glass fiber reinforced polymer bars in concrete |
| topic | bond behavior gfrp steel fibers bond-slip curves surface coating |
| url | https://journal.uokufa.edu.iq/index.php/kje/article/view/16851 |
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