Basic principles of carbon fiber wrapping(CFRP) for bridge repair

The basic principle of using carbon fiber wrap(CFRP)to reinforce the bridge is to use epoxy resin to pre-impregnate the carbon fiber, making it a new composite reinforced reinforcement material. Then use epoxy resin to paste the carbon fiber wrap(CFRP) to the part to be reinforced again to form a composite body of steel bar, concrete and carbon fiber. Promote the carbon fiber wrap(CFRP) and the structure to bear together, improve the structure's own shear or crack resistance, and make the structure's own crack resistance, strength and rigidity meet the requirements. The method of strengthening with carbon fiber wrap(CFRP) can be used in a variety of structures, which can not only play a role in crack prevention, but also achieve corrosion and shock resistance

Project of carbon fiber wrapping(CFRP) for bridge repair

After a long-term use of a bridge, its beams and slabs have produced different degrees. For the bridge to complete, the damage progress is enlarged and serious, and it is decided to use the carbon fiber wrap reinforcement method for treatment. Focusing on the actual situation of this project, the specific application of the carbon fiber wrap reinforcement method is analyzed as follows.

How to use carbon fiber wrapping(CFRP) for bridge repair

Adhesive preparation

Bridge substrate treatment

Apply primer

Leveling

Paste carbon fiber wrap(CFRP) on bridge

Conservation

Advantages of carbon fiber wrapping(CFRP) for bridge repair

(1) Because carbon fiber wrap(CFRP) can achieve large-scale production and has good mechanical properties, it can be used not only in bridge engineering, but also in other construction projects, such as buildings, tunnels and subways.

(2) From the above analysis of the construction method, it can be seen that the tools used in the construction of the carbon fiber wrap(CFRP) reinforcement method are very simple and easy to carry, which can efficiently and safely achieve the reinforcement of the structure.

(3 The carbon fiber wrap(CFRP) itself is a sheet with strong weight but high strength. After being pasted on the surface of the component, it will neither increase the weight of the component nor occupy any space, overcoming the disadvantages of other reinforcement methods.

(4) The construction quality is easy to control, the construction process is simple and convenient, easy to operate, the construction quality is easy to control, and can reach a high quality standard.

(5) It can be seen from practice that the carbon fiber wrap(CFRP) itself has strong durability. After it is pasted to the surface of the member, the overall durability of the carbon fiber wrap(CFRP) and the member can also be improved. Whether it is sun exposure or wind and rain erosion, it will not significantly reduce the performance of carbon fiber cloth.

(6) At present, the price of carbon fiber wrap(CFRP) is still relatively high, but it has obvious advantages in other aspects. At the same time, it requires less manpower in the reinforcement process, so in general, its cost still has certain advantages. Mainly manifested in the following aspects: the amount of carbon fiber wrap(CFRP) used is not large; the volume and mass of the component will not be increased after reinforcement; the sheet has a certain flexibility and can be used on the surface of many types of components; the construction is convenient and the cycle is relatively short.