Experimental investigation of flexural bond behavior of sand-coated GFRP rebar embedded in concrete

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dc.authorid0000-0001-9906-0641
dc.contributor.authorSakcali, Gokhan B.
dc.contributor.authorYuksel, Isa
dc.contributor.authorSagiroglu, Serkan
dc.date.accessioned2026-02-08T15:15:21Z
dc.date.available2026-02-08T15:15:21Z
dc.date.issued2024
dc.departmentBursa Teknik Üniversitesi
dc.description.abstractSteel rebars used in Reinforced Concrete (RC) elements may be subjected to corrosion due to aggressive environmental conditions. Rebar corrosion reduces the durability and the structural capacity of RC elements. On the other hand, since the steel rebars affect the magnetic fields, it is not preferred to be used in RC structures which is used to carry the equipment that propagate magnetic waves such as toll plazas on highways. For these reasons, the use of Fiber Reinforced Polymer (FRP) rebars is increasing, especially in RC infrastructure constructions. The objective of the present study is to investigate the bond behavior of Glass Fiber Reinforced Polymer (GFRP) rebar with a sand-coated outer surface in concrete using the arched beam test method. The concrete strength and the embedment length were chosen as variable parameters and 34 beam test specimens were tested in the laboratory. A comparative analysis of the crack patterns, the diagonal crack angles and the failure modes of the specimens is made. In addition, the experimentally determined bond -slip relationships were compared with different analytical models in the literature. Consequently, a bond -slip model, which takes into account CMR (Cosenza-Manfredi-Realfonzo) for the increasing part and mBPE (modified Bertero-Popov-Eligehausen) for the decreasing part, is proposed to be used in the numerical models of RC beams with sand-coated GFRP rebars. A prediction model for the bond strength is proposed, along with a recommendation for an upper bound value for the bond stress, which indirectly offers a minimum embedment length for a bond without slippage.
dc.description.sponsorshipBursa Technical University Scientific Research Projects Unit [211N042]
dc.description.sponsorshipThis study was supported by Bursa Technical University Scientific Research Projects Unit with research grant numbered 211N042. The authors thank the BTU Rectorate for their support.
dc.identifier.doi10.1016/j.jobe.2024.109113
dc.identifier.issn2352-7102
dc.identifier.scopus2-s2.0-85188810988
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.jobe.2024.109113
dc.identifier.urihttps://hdl.handle.net/20.500.12885/5734
dc.identifier.volume87
dc.identifier.wosWOS:001222726700001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofJournal of Building Engineering
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzWOS_KA_20260207
dc.subjectBond
dc.subjectCMR
dc.subjectEmbedment length
dc.subjectFRP rebar
dc.subjectmBPE
dc.subjectSlippage
dc.titleExperimental investigation of flexural bond behavior of sand-coated GFRP rebar embedded in concrete
dc.typeArticle

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