FraMCoS 11 2023 Bangalore, India

Study on hybrid strengthening for rc beams deteriorated by rebar corrosion

This study investigated the strengthening method based on a new idea for RC beams deteriorated by rebar corrosion. The notable point of the strengthening method in this study was that each strengthening was conducted without any taking measures of rebars…

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Year 2023
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Abstract

This study investigated the strengthening method based on a new idea for RC beams deteriorated by rebar corrosion. The notable point of the strengthening method in this study was that each strengthening was conducted without any taking measures of rebars themselves and adjustments of sectional dimension to the original ones. FRP strand sheet, fiber reinforced concrete (FRC) overlay and a combination of them were adopted as strengthening methods to increase flexural capacity. Moreover, a hybrid strengthening method, in which the FRP strand sheet was embedded into the fiber reinforced mortar, was investigated. As a result, each strengthening method could recover flexural performance. The hybrid strengthening method showed a significant increase in flexural capacity and no delamination and pullout of the FRP strand sheet were observed until failure even though the sheet was bonded by fiber reinforced mortar as same as bonded by epoxy resin.