Carbon fiber reinforced plastics are made by combining carbon fiber materials with specific resin materials through a certain manufacturing process. Its mechanical characteristic is that the stress-strain variable is completely linear elastic, and there is no yield point or plastic zone. Carbon fiber materials have excellent physical and mechanical properties. The carbon fiber cloth used to reinforce concrete components is a soft sheet made of carbon fiber filaments by weaving. When the carbon fiber cloth is woven, a large number of carbon fiber filaments are evenly laid out in one main direction, and the main direction carbon fiber filaments are woven and connected together with a few non-main direction carbon fiber filaments to form a thin film that is stressed in the main fiber direction. Carbon fiber cloth.
The standard value of the tensile strength of carbon fiber cloth should be greater than 3000MPa, and the elastic modulus should be greater than 2.0×l05MPa. Comprehensive analysis of the physical and mechanical properties of the material, in order to maximize the advantages of the material itself, it is suitable to use CFRP material as the tension of the bridge structure Or prestressed flexural components, especially suitable for pure tension components, engineering practice has also proved this. At present, the carbon fiber materials used for bridge reinforcement mainly bear tensile stress and restrain the development of cracks.
