| With the economic development of all the nations, the ability of traffic transportation has been required to improve. The overdue bridges with lower designing standard have influenced the development of transportation. Owing to the improvement of designing standard and the increase of width and load of the roads, the original bridges are required to be consolidated or rebuilt, therefore the amount of work is very large. Because of the investment, materials and project time, it is impossible to demolish all the old bridges and rebuild them; so one of effective methods to solve the problems above is to adopt the measure of less investment, saving material and shorter project time. The technology of reinforcing carbon fiber began in 1980s. It is a new technology that studies how to use a kind of concrete to consolidate the external structure of the roads. Its applied form is mainly sheet and laminating board. The technology was applied to repair the damage of the earthquake of Hanshin in Japan and Los Angeles in America firstly, henceforth it is developed actively in America,Japan and Europe and applied to reinforced bridges. In 1997, the study of the Carbon fiber reinforced concrete structure began in our country, and has been applied to some projects, but the related technical standard, application rules and construction guide are not perfect.This method adopts the fabric of carbon fiber with the same one side, under normal temperature, with the glue of epoxy resin paste it on the surface of concrete structural, structure of reinforced concrete, build structural and timber structure, and make both be a new whole to load together through pasting it on the concrete structure face. Thereby reach for the purpose of the structure being consolidated and improve the mechanics performance of structure. Owing to the region of my country is extensive, differences in temperature and the geography of south to north are greater, So do not yet form a set of relevant unification technical rules of carbon fiber to consolidate bridge, At the present time, the basic thought of design according to principle of structural design mainly. To calculate ultimate load through converting carbon fiber area into the reinforcing bar areaï¼›The destruction forms: concrete is crushed and reaches ultimate press strain. To calculate the tensile strain of carbon fiber through plane assumption to calculate ultimate loadï¼›Through plane assumption and strain coordinative relation calculate ultimate load according to principle of structural design.But there is not experiment and academic analysis about the way of pasting, the change of carbon fiber number of layers at pasting location, the change of width, the change of wrap altitude and the distribution of shear stress of the sticky layer. None but those facts are ample considered we can make the mechanics performance of fiber play fully with top surface, this paper will carry out research work on the foundation of the former research from those aspects. Aspect of theoretical and calculation:According to the relevant theory about principle of structural design regard carbon fiber as pull reinforcing bar, we calculate the ultimate load using formula (2-25), (2-26) calculate, as a result list in table 2-2, table 2-3. In this paper we mainly works on experiment research, after reading large numbers of articles we design and make the beam of reinforced concrete, purchase the material of carbon fiber and so on.According to the design beam to forecast the ultimate capability of the beam and some experiments.On experiment, first carry out the pasting strength experiment of carbon fiber and concrete; second carry out the experiment with different way of pasting. The specific work of the flexural experiment of beam is as follow:Menstruate the pasting strength of carbon fiber and concrete through the simple Axial stretch experiment:In order to measure effectively the pasting strength of carbon fiber and concrete , we machined the stretch specimen, Figure 3-1,Which shows that carbon fiber...
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