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Numerical simulation of GFRP strengthened concrete beams

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Document pages: 10 pages

Abstract: The constitutive models of fiber reinforced concrete with alkali resistant glass fiber volume fraction of 0.0 , 0.5 , 1.0 and 1.5 respectively are tested, and the constitutive relationship of GFRC axial tensile stress-strain full curve is obtained; The constitutive relationship of GFRP is obtained by experiment, and the secant modulus is obtained by fitting the univariate cubic equation. The finite element numerical simulation of GFRP fiber reinforced concrete beam is carried out, and the load deflection nephogram, strain nephogram, crack nephogram and GFRP stress nephogram of GFRP fiber reinforced concrete beam are obtained. When the fiber content is 1.0 , the bearing capacity of GFRP strengthened concrete beams is the best, when te incorporation of fiber is within the load range of about 60 , which inhibited the developing speed of cracks, but with the gradual increase of the load, the “bridging” effect disappeared.

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