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At present , China has a lot of concrete bridges due to various reasons need repair or reinforcement . In recent years , the technology of CFRP reinforced concrete structure is widely used both at home and abroad . In order to take full advantage of the high-strength CFRP cloth characteristics , CFRP Bushi Jia prestressed , and then paste in the beam bottom flexural reinforcement can achieve better reinforcement effect , become a direction of development in recent years CFRP reinforced concrete beams . To prestressed CFRP cloth reinforcement of concrete bridge application technology as the main object of study , involved CFRP Bushi Jia prestressed dedicated tensioning device R \u0026 D , CFRP Prestressed Reinforced concrete bridge construction technology , construction procedures and construction technical points . The thesis completed seven T-shaped concrete beam test, study the impact of the mechanical properties of CFRP reinforced amount of prestressing degree , reinforcement ratio , as well as the secondary load factors . Through the experimental study and analysis , the following main conclusions : ( 1 ) using prestressed CFRP Reinforced concrete beams full play and use of high-strength CFRP cloth , bearing capacity is improved . ( 2 ) with ordinary CFRP Strengthening prestressed CFRP Strengthening concrete beams can delay cracking, reduce deflection and reinforced strain , to improve the yield load , so as to meet the normal use of the limit state design requirements . ( 3 ) U- hoop anchorage measures to avoid interfacial debonding of prestressed CFRP sheets when laying , and allows the CFRP cloth prestressed distributed more evenly , and give full play to the high-strength CFRP cloth performance . The paper also carried a prestressed CFRP Reinforced Concrete Beam Prestressed loss , failure mode and flexural capacity analysis , the proposed design recommendations and calculation methods , and the calculation results with the experimental results are in good agreement .
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