Hybrid Use of Externally Embedded FRP Reinforcement for Seismic Retrofitting of Substandard RC Columns

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dc.authoridIlki, Alper/0000-0002-4853-7910
dc.authoridgoksu, caglar/0000-0002-0596-6918
dc.contributor.authorSeyhan, Engin C.
dc.contributor.authorGoksu, Caglar
dc.contributor.authorSaribas, Ilyas
dc.contributor.authorIlki, Alper
dc.date.accessioned2025-01-06T17:36:24Z
dc.date.available2025-01-06T17:36:24Z
dc.date.issued2023
dc.description.abstractThis paper discussed the effectiveness of the hybrid use of fiber-reinforced polymer (FRP) reinforcement for the seismic retrofitting of substandard reinforced concrete (RC) columns. Four columns, except for the reference, were retrofitted with externally embedded FRP (EE-FRP) bars in a longitudinal and external FRP jacket in the transverse directions. The test parameter was the configuration of the FRP bars that were used for retrofitting along the longitudinal direction (e.g., single or hybrid use of different types of FRP bars, such as aramid (AFRP), glass (GFRP), or carbon fiber-reinforced polymers (CFRP). The test results indicated that a significant enhancement in the lateral load capacity (<= 198% in the unstrengthened column) could be achieved through the hybrid use of FRP bars under reversed cyclic lateral displacement and a constant axial load without a significant sacrifice in deformability. In addition, the test results yielded insights into the strain (e) capacities of longitudinal FRP bars in tension and their contribution to compression resistance under reversed cyclic lateral loading conditions. In addition, an analytical study was conducted to predict the cyclic flexural behavior in substandard RC columns that were retrofitted through the single or hybrid use of EE-FRP bars that considered the debonding behavior of longitudinal CFRP bars with a smooth surface.
dc.description.sponsorshipITU Scientific Research Department [326024]; Master Builders Solutions; OTS Engineering Company; Structural and Earthquake Engineering Laboratory of Istanbul Technical University; Building Materials Laboratory of Istanbul Technical University
dc.description.sponsorshipThe financial support of the ITU Scientific Research Department (Scientific Research Project No:326024), Master Builders Solutions, OTS Engineering Company, and the assistance of the staff of the Structural and Earthquake Engineering Laboratory and Building Materials Laboratory of Istanbul Technical University are gratefully acknowledged. The authors are also thankful for the support of MSc. A. Uzunhasanoglu.
dc.identifier.doi10.1061/JCCOF2.CCENG-3906
dc.identifier.issn1090-0268
dc.identifier.issn1943-5614
dc.identifier.issue3
dc.identifier.scopus2-s2.0-85149312546
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1061/JCCOF2.CCENG-3906
dc.identifier.urihttps://hdl.handle.net/20.500.14669/1866
dc.identifier.volume27
dc.identifier.wosWOS:000971062700009
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherAsce-Amer Soc Civil Engineers
dc.relation.ispartofJournal of Composites For Construction
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241211
dc.subjectAramid
dc.subjectCarbon
dc.subjectColumn
dc.subjectCyclic
dc.subjectExternally embedded fiber-reinforced polymer
dc.subjectFlexure
dc.subjectGlass
dc.subjectReinforced concrete
dc.subjectRetrofitting
dc.subjectSeismic
dc.titleHybrid Use of Externally Embedded FRP Reinforcement for Seismic Retrofitting of Substandard RC Columns
dc.typeArticle

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