Method for reinforcing steel structure through FRP (Fiber Reinforced Polymer)

Abstract

The invention discloses a method for reinforcing a steel structure through FRP (Fiber Reinforced Polymer). The FRP adopted in the invention is carbon fibre reinforced polymer (CFRP), specifically, mesophase pitch (MP) based carbon fiber is used as raw material, the mesophase pitch based carbon fiber is the fiber obtained by spinning processing of pitch obtained through thermal polymerization of isotropic pitch with high aroma content, and having a mesophase or liquid-crystal structure, and the stress performance of the fiber is improved, so that a reinforcing effect is realized. The method has the characteristics that since the fiber reinforced polymer (FRP) has the characteristics of being high in specific strength and specific stiffness, and corrosion-resistant, the fiber reinforced polymer (FRP) is widely applied to reinforcing of a concrete structure, and the steel structure reinforced through the fiber reinforced polymer (FRP) has a good effect. The method for reinforcing the steel structure through the fiber reinforced polymer (FRP) has the characteristics that the specific strength is high, rapid construction is achieved, and bearing capacity of the structure is obviously improved after construction.

Description

technical field [0001] The invention discloses a method for reinforcing steel structures with FRP, in particular a method based on carbon fiber (CFRP). Background technique [0002] In-service steel structures, such as bridges, buildings, structures, coastal and offshore engineering, pressure vessels for petrochemical industry, pipelines, tower masts, etc., may have various defects in the process of design, manufacture, and construction. , rust, fatigue and other reasons will cause the accumulation of damage to the structure, thus affecting the safety of the structure. The traditional steel structure reinforcement method is to weld, bolt, rivet or glue the steel plate to the damaged part of the original structure. New problems, such as new damage and welding residual stress. [0003] In order to overcome the above problems, the present invention designs a method for reinforcing steel structures with FRP. Fiber Reinforced Polymer (FRP) structure reinforcement technology ove...

AI Technical Summary

Problems solved by technology

[0002] In-service steel structures, such as bridges, buildings, structures, coastal and offshore engineering, pressure vessels for petrochemical industry, pipelines, tower masts, etc., may have various defects in the process of design, manufacture, and construction. , corrosion, fatigue and other reasons will cause the accumulation of damage to the structure, thus affecting the safety of the structure

The traditional steel structure reinforcement method is to weld, bolt, rivet or glue the steel plate to the damaged part of the original structure. New problems, such as new damage and welding residual stress, etc.