A self-resetting beam-column joint of steel structure that can dissipate energy in stages

Abstract

The invention relates to a self-resetting steel structure beam-column joint that can consume energy in stages. The upper and lower parts of each H-shaped steel beam and H-shaped steel column are installed with stiffener connectors, which include angle steel and vertical stiffeners. The web of the H-shaped steel column is a symmetrical plane, and the shape memory alloy long screw passes through the short leg of the angle steel and the flange of the H-shaped steel column vertically on the same side of the symmetrical plane; it also includes several channel steels, the waist of the channel steel and the H-shaped steel column. The web of the steel beam is tightly fitted and connected by high-strength bolts, one end of the channel steel is connected to the flange of the H-shaped steel column, and a U-shaped metal damper is arranged between the outer wall of the leg of the channel steel and the inner wall of the flange of the adjacent H-shaped steel beam; The node can realize the self-resetting function of the node under the action of an earthquake through the superelasticity of the shape memory alloy long screw, and rely on the shape memory alloy long screw and U-shaped metal damper to achieve the preset goal of grading and dissipating seismic energy in stages. At the same time, the damaged components can be quickly disassembled and replaced after the earthquake, which is repairable.

Description

Technical field [0001] The present invention relates to a self-resetting steel structure beam node that can be degraded, belonging to the field of earthquake resistance and shock absorption technology in the construction structure. Background technique [0002] The self-reset beam column node is a resurable function of seismic structure. When it is possible to maintain an acceptable function, it can restore its useful function when it is necessary to maintain an acceptable function and it is necessary to repair or slightly restored after the earthquake. At this stage, from the reset steel structure beam column node usually rely on steel stranded pairs to provide recovery power, and the special tensile anchoring measures are required in the construction stage, and the prestressed loss and steel strand rust have occurred during the use period. Maintenance costs Higher. The shape memory alloy screw basically has no creep, and the material itself does not have the loss of the materia...

AI Technical Summary

Problems solved by technology

[0003] At the same time, a large number of research results and engineering practices have shown that although shape memory alloys provide superelasticity and have stable energy dissipation characteristics, they are weaker than other metal energy dissipation devices.

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