Toshiaki KADONAGA
Development of Repair and Strengthening Method for Reinforced Concrete Member with Glass Fiber.
Supervisor: Takumi SHIMOMURA
A repair method for concrete structures with glass short fiber and acrylic resin was developed and adopted in the architectural area. In this research, the possibility to use this repair method with glass fiber and acrylic resin as a strengthening method for civil structures was examined.
Laboratory tests on both uniaxial tensile specimens and beam specimens were carried out, in which number of lamination layer of the glass fiber and combination of the continuous glass fiber and short glass fiber were set as experimental parameters. In addition, to investigate influence of the difference of resin, the test with the epoxy resin was also performed.
In the uniaxial tensile test, mechanical property of the fiber in each case was clarified.
In the test on beam specimen, it was found that continuous glass fiber can strengthen efficiently more than laminating short glass fiber. The reinforcing effect is the highest in laminating continuous glass fiber. The shear contribution of fiber sheet can be evaluated by the truss analogy that assumed the shear capacity of the fiber sheet is contributed to the diagonal cracking face. From result of test with epoxy resin, it was found that to use the bonding resin which has high ability to transmit tensile stress to the fiber is effective in strengthening of structural members with fiber materials.
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