Based on the analysis and calculation results and stress characteristics of structural members, the carbon fiber sheet is pasted on the corresponding part of the concrete component whose strength does not meet the stress requirements by applying matching resin, so as to meet the requirements of bearing capacity. The strengthening principle is to transfer the load of concrete members to carbon fiber by using the shear strength of its matching resin, so that the post bonded carbon fiber cloth and the original reinforced concrete members can bear the load force together.
The strengthening features of carbon fiber sheet are as follows:
High strength: the strength of carbon fiber reinforced materials is generally higher than that of steel, and the strength of some specially strengthened carbon fiber can reach several times of that of steel. Light weight: the specific gravity is about 1 / 5 of the steel plate, so the self weight of the original structure will not be increased after reinforcement. Simple construction: carbon fiber is light in weight, and generally only needs manual operation, which is not limited by the construction space. The construction speed is not limited by the shape. No matter the square, hexagonal and various irregular shapes, the objects can be kept in the original state after reinforcement, without affecting the surface decoration.
Application range of carbon fiber cloth:
Strengthening of building beam, column and floor structure; reinforcement of bridge, pier and bridge deck structure; reinforcement of tunnel and chimney structure; crack repair of concrete components; anticorrosion reinforcement of beach building; civil building, industrial building, municipal road and bridge, water conservancy engineering, electric power engineering, etc.
Technical points
The fiber direction should be consistent with the stress direction of the reinforcement;
For shear reinforcement and seismic reinforcement, the fiber direction should be perpendicular to the axial direction of the component;
The concrete strength grade should not be lower than C15 for flexural reinforcement and shear reinforcement, and not less than C10 for concrete columns strengthened with closed bonded carbon fiber;
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