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Title |
Structural Performance of Reinforced Concrete Shear Columns Strengthened with Sprayed Fiber Reinforced Polymers
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Keywords |
철근콘크리트 기둥 ; 탄소 및 유리섬유 ; 비닐에스테르수지 ; 에폭시수지 R/C columns ; Sprayed FRP ; Carbon & ; Glass fibers ; Vinyl ester resin ; Epoxy resin |
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Abstract |
In this study, a structural performance of R/C columns controlled by shear, strengthened with Sprayed FRP, was investigated. For this purpose, six 2/3-scaled column specimens were designed and tested by the pseudo-static reversed cyclic load under a constant axial load, which is 10% of the nominal axial strength of the column. Four specimens were strengthened by Sprayed FRP with different combinations of short fibers (carbon or glass) and resins (epoxy or vinyl ester). For comparison purpose, tests of a specimen strengthened with carbon fiber sheet (CFS) and a control specimen without strengthening were carried out, respectively. The result reveals that shear strengths and ductility capacities of columns strengthened with Sprayed FRP improved remarkably, compared to those of the control column, and the Sprayed FRP technique developed in this study is able to use the strengthening scheme of existing R/C columns.
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