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Title |
Analysis of RC Beams Strengthened with Fiber Sheets
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Keywords |
섬유시트 ; 파단변형률 ; 비선형 콘크리트 응력 ; 비선형 휨해석 Fiber sheets ; Rupture strain ; Nonlinear concrete stresses ; Nonlinear flexural analysis |
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Abstract |
This paper presents a nonlinear analysis method for the reinforced concrete beams strengthened by the external bonding of high strength, lightweight fiber sheets on the tension face of the beams. The method is based on the results of experimental studies. The experimental study involved tensile tests of 120 specimens to evaluate the tensile properties of fiber sheets(carbon, glass, and aramid fiber) and bending tests of 75 beams strengthened with various types of fiber sheets to evaluate the flexural capacities. Based on these experimental results, reasonable rupture strains of the fiber sheets were estimated. The nonlinear flexural analysis considered nonlinear flexural stresses as compressive and tensile stresses of concrete, load-deflection curves, and rupture strains of fiber sheets. The nonlinear flexural analysis accurately predicts the load-deflection response and the flexural behavior of the retrofitted beams.
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