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An Experimental Study on Concavely Curved Soffit Reinforced Concrete Beams Externally Bonded with FRP
Externally-bonded (EB) fibre reinforced polymer (FRP) retrofitting system has emerged as a promising strengthening technique to improve flexural performance of concrete structures. This paper presents the results of an experimental program studying the behaviour of concavely-curved soffit reinforced concrete (RC) strengthened in flexure with EB carbon fibre reinforced polymer (CFRP) composites. Thirty-two RC beams were statically tested in this program. Of these beams, twenty-three were curved soffit beams with varying degree of curvature ranging between 5 mm/m and 20 mm/m, and nine beams were constructed with flat soffit as control beams. The ultimate capacity, failure mode, flexural stiffness, and the ductility of these beams are analysed and discussed. Based on the experimental results, concavely-curved soffit RC beams with the smallest degree of curvature strengthened with EB-CFRP performed better than beams with higher degree of curvature strengthened with similar CFRP system. This study identifies gaps of knowledge in existing design guidelines and codes and presents recommendations for designers on EB-CFRP technology.
An Experimental Study on Concavely Curved Soffit Reinforced Concrete Beams Externally Bonded with FRP
Externally-bonded (EB) fibre reinforced polymer (FRP) retrofitting system has emerged as a promising strengthening technique to improve flexural performance of concrete structures. This paper presents the results of an experimental program studying the behaviour of concavely-curved soffit reinforced concrete (RC) strengthened in flexure with EB carbon fibre reinforced polymer (CFRP) composites. Thirty-two RC beams were statically tested in this program. Of these beams, twenty-three were curved soffit beams with varying degree of curvature ranging between 5 mm/m and 20 mm/m, and nine beams were constructed with flat soffit as control beams. The ultimate capacity, failure mode, flexural stiffness, and the ductility of these beams are analysed and discussed. Based on the experimental results, concavely-curved soffit RC beams with the smallest degree of curvature strengthened with EB-CFRP performed better than beams with higher degree of curvature strengthened with similar CFRP system. This study identifies gaps of knowledge in existing design guidelines and codes and presents recommendations for designers on EB-CFRP technology.
An Experimental Study on Concavely Curved Soffit Reinforced Concrete Beams Externally Bonded with FRP
Lecture Notes in Civil Engineering
Ilki, Alper (editor) / Ispir, Medine (editor) / Inci, Pinar (editor) / Al-Mahaidi, Riadh (author) / Al-Ghrery, Khattab (author) / Kalfat, Robin (author) / Oukaili, Nazar (author)
International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering ; 2021 ; Istanbul, Turkey
10th International Conference on FRP Composites in Civil Engineering ; Chapter: 6 ; 78-86
2021-11-27
9 pages
Article/Chapter (Book)
Electronic Resource
English
Flexure strengthening , Externally bonded , EB-FRP , Carbon fibre reinforced polymer , CFRP , Reinforced concrete , Curved soffit beams , Premature de-bonding Engineering , Building Materials , Structural Materials , Fire Science, Hazard Control, Building Safety , Geotechnical Engineering & Applied Earth Sciences
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