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《Sichuan Building Science》 2017-04
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Calculation method of stiffness of reinforced concrete beams strengthened with pre-stressed CFRP sheets

SONG Xianrui;QIAN Wei;Henan Technical College of Construction;Henan Provincial Academy of Building Research;  
Fifteen reinforced concrete beams strengthened with carbon fiberglass reinforced plastic( CFRP) sheets were experimentally investigated to research the stiffness of the beams,and the effect of the initial load and pre-stressing of CFRP on stiffness of the beams was studied. A calculation method of the stiffness of the RC beams strengthened with pre-stressed CFRP sheets was proposed,after analyzing the method for calculating the stiffness of RC beams,which took into account the effects of pre-stressing force and initial load.It has been testified that the formulas are in agree with the result of experiments and can be available for reference in design.
【Key Words】: RC beam pre-stressing CFRP sheet strengthening stiffness deflection
【CateGory Index】: TU37
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