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Reinforced concrete structure has always been known for its durability , but in the application process often suffer due to various factors varying degrees of damage , which affects the safety of reinforced concrete structures and durability . This requires repair of damaged buildings , renovation and reinforcement. The use of glass fiber cloth (GFRP) reinforced concrete reinforcement is an advanced technology that has been in civil engineering more widely used . But the technology , there are still some limitations, ordinary glass fiber reinforced materials , the force of the component normal stage performance improvement is limited, high-strength reinforcement material properties can not be fully realized. How to play better performance of high-strength glass fiber cloth has become the focus of researchers . In this paper, a different degree of injury of reinforced concrete beams were used to paste the common law and the GFRP GFRP France prestressed reinforcement, reinforcement method through experimental studies of different reinforcing effect of reinforced concrete beams and flexural properties. Reinforced by five different degree of injury , different methods GFRP concrete beams experimental research, analysis and comparison of the performance of the bending beam , combined with theoretical analysis and experimental results drawn important conclusions : ( 1 ) For the same degree of damage concrete beams strengthened with FRP prestressed glass damaged bEAMS ( yield load , ultimate load , distribution and development of cracks , deflection, deformation capacity ) was significantly better than ordinary damaged GFRP beams . ( 2 ) for the same reinforcement method , a lesser extent of the damage after the beam , reinforced stress performance is better than the heavier beams extent of the damage . Based on the comprehensive existing theoretical calculations based on the results , combined with the results of this study , researchers establish theoretical formula , the comparative analysis, theoretical calculations are in good agreement with the experimental data .
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