Performance characteristics of loyalty FRP products

tensile strength

The tensile strength of FRP is higher than that of steel bar, and the tensile strength is similar to that of high strength steel wire, which is generally 2 times or 10 times that of steel bar. But before reaching the tensile strength of FRP material, almost no plastic deformation, tensile stress and strain is linear elastic rising to brittle fracture, so the process of FRP composite material in concrete structure and interaction, is not because of FRP material is tensile failure, but because of the interfacial strength of FRP- concrete due to the lack of concrete interface the structure is debonding, so the bond performance of the FRP- concrete interface problem become a key and difficult problem in engineering application.

Performance characteristics of loyalty FRP products

Coefficient of thermal expansion

The thermal expansion coefficient of FRP composite is similar to that of concrete, so when the ambient temperature changes, there will be no large temperature stress between FRP and concrete.

Modulus of elasticity

Most FRP products have small modulus of elasticity compared with steel. About 25%~ 75% for ordinary steel. Therefore, the design of FRP structure is usually controlled by deformation.

Shear strength

The shear strength of FRP is low, and its strength is only 5%~20% of tensile strength, which makes the FRP members need to develop special anchorage and fixture during the connection process. This also makes the moderation of FRP components a prominent problem.

Anti corrosion and anti fatigue properties

FRP material is good in corrosion resistance and fatigue resistance. It can be used in acid, alkali, chloride and humid environment for a long time, thus improving the service life of the structure, which is incomparable with structural materials. But at the same time, compared with the general concrete, the fire performance deviation of FRP composites, which also restricts the popularization and application of such structural products, will become one of the problems to be solved in the future.

weight

The strength is very high, which is usually described as light and high strength, so the use of FRP material can reduce the weight of the structure, the construction is convenient, the weight is generally 20% of the steel.

Good design

FRP belongs to the artificial material can be according to the need of the project using the fiber content of different materials fiber and elaborate different process design methods of different strength, elastic modulus and specific performance requirements of FRP products, and FRP shovel shape flexible design.

8, factory production, site installation, to ensure the quality of the project to improve labor efficiency and construction industrialization.

Other advantages

Insulation, heat insulation and electromagnetic wave can be used in some special occasions, such as the structure of medical magnetic resonance equipment for the ground magnetic observation station of radar station, etc.