FRP jacketing and steel jacketing reinforcement are often used in building struatural strengthening reinforcement. However, many people cannot clearly distinguish the advantages and disadvantages of the two. Today, I will compare the advantages and disadvantages of FRP jacketing and clad steel reinforcement.

FRP jacketing

FRP jacketing technology (FRP reinforcement technology) is divided into fiber cloth reinforcement technology and fiber plate reinforcement technology. It is a new type of technical method of reinforcement and repair. It mainly uses resin bonding materials to paste fiber reinforced polymer(FRP) product on the concrete surface and the stressed parts of the components to achieve the reinforcement of the building structure.

Advantages of FRP jacketing

1 The carbon fiber material itself is relatively high in strength and light in weight. After the reinforcement construction, the appearance of the original structure is basically not changed, and at the same time, the weight of the original structure is basically not increased;

2 The FRP jacketing construction process is simple, the construction period is short, and the efficiency is high.

3 The carbon fiber itself has a high elastic modulus, and it has a better control effect on temperature cracks, rust expansion cracks and other fine deformations after reinforcement.

4 FRP jacketing almost does not require bolts and anchors and external compression, and there is almost no damage to the original concrete structure.

5 After the FRP jacketing method is used for reinforcement construction, there is no need to deal with the interface during decoration construction, and only sand and paste during the later process of carbon fiber sheet construction.

6 When the carbon fiber reinforced double or triple layer is pasted, the thickness of itself is relatively thin, and there is almost no influence of the shear moment due to the thickness increase, so the reinforcement effect is better.

7 Carbon fiber cloth material has a unique reinforcement effect on the narrow working surface due to its flexibility and windability.

8 FRP jacketing can reduce a lot of unnecessary manpower, material and financial resources, and save a lot of construction time.

Steel Jakceting

The steel jacketingreinforcement method is a reinforcement method in which section steel (usually angle steel) is wrapped around the four corners (or two corners) of a member to enhance its force-bearing performance. The

steel jacketing method can greatly increase the bearing capacity, increase the ductility and rigidity of the component without basically increasing the size of the component, and the force is more reliable. It is applicable to the reinforcement of the structure that does not allow to increase the cross-sectional size of the original member, but requires a large increase in the load-bearing capacity of the cross-section, and increased ductility and rigidity.、

The steel jacketing reinforcement method is the reinforcement method in which the steel is pasted on the reinforced component through structural pouring glue, and the newly added steel and the original component form a whole and work together. After steel jacketing reinforcement, the cross-sectional area of the steel under tension and compression is greatly increased, so the front section bearing capacity and section stiffness are also greatly improved.

Advantages of steel jacketing

The construction of steel jacketing is simple and easy to operate, can significantly improve the carrying capacity of structural speculation, and is relatively reliable. At the same time, steel jacketing has little impact on the use of space, the workload on the site is also small, and the construction time is short.