Angle-adjustable pre-pressing steel structural fatigue reinforcing component

Abstract

The invention discloses an angle-adjustable pre-pressing steel structural fatigue reinforcing component formed by a pair of steel reinforced sheets customized and connected via a butterfly-hinge, two screw rods and a steel cylinder with an internal thread and capable of counterrotating. One ends of the two screw rods are hinged on steel rods exposed out of the centers of the external sides of the two reinforced sheets; free ends of the two screw rods are prefabricated with external threads; and the free ends are connected via the cylinder with the internal thread and capable of counterrotating. Opening angle of the reinforcing component can be adjusted via the rotating cylinder; during the reinforcement, the cylinder rotates according to an angle of a to-be-reinforced area to enable the reinforcing component to achieve a matchable angle; the reinforcing component and the steel component can be bonded via steel structure adhesive; after the adhesive is fixed and coagulated, secondary adjustment is realized for the angle via the rotation of the cylinder; the angle is properly enlarged to reinforce fatigue loss with a pre-pressing effect for an obtuse angle steel structure; fatigue reinforcement of various angles can be met; convenient operation and use can be achieved; and the reinforcing component has wide use range and is easy to promote and use.

Description

technical field [0001] The invention relates to an angle-adjustable steel structure fatigue reinforcement component, in particular to a reinforcement component suitable for reinforcing (repairing) fatigue damage in weld areas of steel components with different angles. Background technique [0002] Due to the concentration of defects such as residual stress in the weld zone and the coupling fatigue of various forces and deformations, steel members are prone to fatigue damage and cracks, which may lead to structural (member) mechanical failure. [0003] For the fatigue damage repair of steel structures, measures to reinforce the defective parts are often used in engineering to improve the stress state of the defective parts. The traditional reinforcement method is to use steel for reinforcement, and connect the steel plate to the original member by welding, bolting, riveting or bonding. Traditional reinforcement methods often bring many new problems, such as: welding reinfo...

AI Technical Summary

Problems solved by technology

Traditional reinforcement methods often bring many new problems, such as: welding reinforcement can easily lead to ① making the material of the thermoplastic zone brittle and reducing the fracture toughness; ③Residual stress, combined with other factors, may lead to cracking; ④The plastic deformation of the material is difficult to develop; welding makes the structure form a continuous whole, once the crack develops, it may break to the end

The bolted connection or riveting method will cause ① the opening will weaken the section and form a new stress concentration area; ② the quality is not easy to control, and it is easy to loosen under the action of dynamic load; Partial hardening of the steel reduces the effect of reinforcement

Bonded steel reinforcement technology requires the use of mechanical equipment to pressurize, the process is complicated, and the construction quality is not easy to guarantee

The repair of fatigue damage in the intersection area of ​​multiple welds is more difficult to achieve due to the local vulnerability caused by multiple welds.

[0004] The existing methods of strengthening steel structures by using reinforcement sheets are difficult to apply to fatigue reinforcement requirements from various angles

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