Prestressed Carbon Fiber Reinfored Polymer Reinforces Existing Bridge Of The Applied Research.

Bridge is not only the throat of the road, but also an important livelihood projects. With the rapid development of economy and the improvement of Scientific and technological level, the traffic volume is bound to increase. In order to ease the traffic pressure, we have built a large number of bridge engineering. But active bridge will be led to a variety of bridge damages at the same time by the low originally design standard value, improper construction, natural environment influence, the human factor and so on. These damages may directly affect the bearing capacity of bridges to led bridge destruction, and the normal usage of bridge to cause hidden trouble to safety. Therefore, it is great significant to promote the development of China’s transportation industry by the excellent bridge reinforcement technology.Prestressed CFRP reinforcement method is a new structural strengthening technology in recent years. It combines the advantages of the common carbon fiber sheet reinforcement and prestressed reinforcement method, through the prestressed carbon fiber plate pasted to the reinforcement member and the joint force, in order to achieve the purpose of improving the mechanical properties of the components. The carbon fiber material has the advantages of light weight, high strength, corrosion resistance and convenient construction, so it has a good prospect in the field of civil engineering. It sticks on the prestressed CFRP material in reinforced concrete beam of ramen noodles to the joint force, can significantly improve the bearing capacity and stiffness of beam, reduce the original beam deflection, and improve the mechanical properties of the components. The carbon fiber material has the advantages of light weight, high strength, good corrosion resistance and convenient construction, so it has a good prospect in the field of civil engineering. With more and more developed science and technology, the computer level then continues to advance, the finite element software is increasingly perfect. The prestressed carbon fiber plate reinforcement technology combines with the finite element simulation software, can be better, faster, more convenient to analyze the mechanical properties of the components and provide reference for actual engineering design and construction.The specific content of this paper includes: at first this paper introduces the principle and theoretical calculation methods of the Prestressed CFRP reinforcement method, which is to provide the theoretical basis and technical support for follow-on work. Then it combines with the engineering examples which is detected by participant observation and static and dynamic load test to know and solve existing problems of the project. Concrete exists the phenomenon of the voids, pits, crack and so on. Steel exists the phenomenon of corrosion and the loss. Finally, prestressed CFRP reinforcement method is chosen and the reinforcement effect is verified by the finite element software Dr. Bridge. The model includes the following three conditions, such as the original design, the actual construction and the reinforcement conditions(only explaining the six beam in this paper). The checking computations include: persistent condition the limit state of bearing capacity, persistent condition the limit state of serviceability and persistent condition stress calculation.Finally, according to the actual work and the deep understanding of the prestressed CFRP plate reinforcement method, this paper makes a summary and puts forward the further research content.The engineering project on the success of bridge reinforcement provides that prestressed CFRP has great engineering practical value. For the actual bridge engineering application to lay a solid foundation.