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Title |
Flexural Performance of Slabs Strengthened by Fiber-Reinforced Polymer Sheet with Hydrophilic Epoxy
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Authors |
주현진(Hyunjin Ju) ; 한선진(Sun-Jin Han) ; 조해창(Hae-Chang Cho) ; 이득행(Deuck Hang Lee) ; 김강수(Kang Su Kim) |
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DOI |
http://dx.doi.org/10.4334/JKCI.2016.28.1.085 |
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Keywords |
휨거동 ; 탄소섬유 시트 ; 그라우트 ; 보강 ; 에폭시 flexural performance ; FRP ; grout ; strengthening ; epoxy ; HCGS |
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Abstract |
In this study, the hydrophilic chemical grout using silanol (HCGS) was introduced to overcome the limitations of conventional epoxy resin which have been used for strengthening reinforced concrete (RC) structures. Then, flexural tests on the RC slabs strengthened by FRP sheets were conducted. Three slab specimens were tested in this study; a control specimen with no strengthening, and two specimens strengthened by a typical epoxy resin or HCGS, respectively, as a binder between the slabs and the FRP sheets. In addition, an analytical model was developed to evaluate the flexural behavior of strengthened slab members, considering the horizontal shear force at the interface between concrete slabs and FRP sheets. The analysis results obtained from the proposed model indicated that the strengthened specimens showed fully composite behavior before their flexural failure. Especially, the specimen strengthened by HCGS, which can overcome the limitations of conventional epoxy resin, showed a similar flexural performance with that strengthened by a conventional epoxy resin.
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