Steel pipe tubular joint reinforced by carbon fiber composite reinforcing materials

Abstract

The invention discloses a steel pipe tubular joint reinforced by carbon fiber composite reinforcing materials. The steel pipe tubular joint comprises a joint steel pipe main pipe, a joint steel pipe branch pipe, a bonding agent and carbon fiber cloth, wherein the joint steel pipe main pipe and the joint steel pipe branch pipe are round or rectangular steel pipes, the bonding agent is uniformly coated on the steel pipe tubular joint, the carbon fiber cloth is pated and wound on the bonding agent, and the carbon fiber cloth covers the steel pipe tubular joint coated with the bonding agent. The steel pipe tubular joint provided by the invention is applicable to the reinforcement of the existing welding pipe joint, the carrying force, the fatigue resistance performance, the corrosion resistance and the durability can be improved, the stress concentration degree of the joint is reduced, and the generation and the development of cracks are relieved.

Description

technical field [0001] The invention relates to the technical field of novel structures of civil engineering, in particular to a steel pipe intersecting node reinforced with carbon fiber composite reinforcing materials. Background technique [0002] In the past ten years, steel pipe intersecting joints have been more and more widely used in various structures such as airports, stations, bridges, stadiums, TV towers, exhibition centers, industrial buildings and high-rise buildings due to their unique advantages. However, a large number of experiments have proved that the steel pipe structure will often be damaged at the joints, and the joints must be repaired or reinforced. Due to the huge cost of new construction and the difficulty of completely overturning and rebuilding the parts that need to be reinforced, the search for an economical and efficient steel pipe structure reinforcement and repair technology is not only an urgent technical problem to be solved, but also a soc...

AI Technical Summary

Problems solved by technology

For example, the appearance of the casing, backing plate and ring plate is not beautiful; the construction of the stiffening ring is too difficult; the gusset plate and the rib plate will affect the building space, the calculation result of rib plate reinforcement is not ideal, and the utilization rate of the rib plate is not good. high

The most important thing is that these reinforcement methods are all welded on the main pipe or branch pipe of the node with steel plates or steel pipes. The high temperature during welding will deteriorate the structure and performance of the welded parts, make the material brittle, and reduce the fracture toughness. At the same time, the welds are often more or less There are few defects; there are residual stresses inside the structure after welding, which may lead to cracking in combination with other effects

Since the welding makes the structure form a continuous whole, once the crack expands unstable, it may break to the end, which is quite harmful

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