What are the advantages of FRP strengthening compared with traditional reinforcement?

Welding reinforcement

High temperature will make the microstructure and properties of the welded parts worse, weld defects and residual stress in the welded structure, and weld the structure to form a continuous whole. Once the crack is unstable, it will break to the ground and cause major accidents.

Bolt connection

It is necessary to drill holes on the base metal near the damage site, not only to weaken the cross section, but also to form a new stress concentration area. Ordinary bolts are easy to loosen under dynamic load, and high strength bolts are easy to relax stress, thus reducing the effect of structural reinforcement and repair.

Bond steel plate reinforcement

It is necessary to paste steel plate on the surface of the structure. The steel plate is pasted on the structural surface through the structural adhesive so as to work together so as to improve the overall bearing capacity of the structure. Steel plate is not easy to produce various complicated shapes. Transportation and installation are all very troublesome. And the steel plate is easy to rust, which affects the bonding strength, and the later maintenance cost is higher.

FRP strengthening

FRP reinforcement is a new strengthening technology following the reinforcement of cross section and bonded steel. Carbon fiber reinforcement has a certain market advantage, such as high strength, high modulus of elasticity, high temperature resistance, corrosion resistance, fatigue resistance, creep resistance and so on. It is suitable for strengthening concrete structure, steel structure, wooden structure and other structures, and can effectively improve the bearing capacity, durability and seismic performance of components.

Carbon fiber reinforcement, not only can effectively use the advantages of carbon fiber, but also can avoid many disadvantages of traditional reinforcement, is a convenient and low cost strengthening method at present.