A self-centering buckling restraint end connection device for circular tubes

Abstract

The invention discloses a round-pipe self-centering buckling restrained brace end connecting device. The round-pipe self-centering buckling restrained brace end connecting device comprises a sandwich rubber end plate, a round-pipe-shaped connecting piece penetrating through the sandwich rubber end plate, inner friction plates connected to the upper surface and the lower surface of the non-restrained end of the round-pipe-shaped connecting piece, and outer friction plates connected to the two sides of the inner friction plates. The sandwich rubber end plate comprises a rubber pad, an end plate body, an inner base plate and an outer base plate, wherein the end plate body is arranged on the side, facing the inner friction plates, of the rubber pad, and the inner base plate and the outer base plate are arranged on the other side of the rubber pad. Grooves are formed in the inner friction plates, and the inner friction plates and the outer friction plates can slide relatively along the grooves. The self-centering buckling restrained brace end connecting device and a self-centering buckling restrained brace are connected in the way that the restrained end of the round-pipe-shaped connecting piece is welded to one end of a core plate and an outer sleeve, the outer base plate makes contact with the outer sleeve, the inner base plate makes contact with an inner sleeve, and a pre-pull rod arranged in the inner sleeve is anchored on the end plate body after prestressing force is applied.

Description

technical field [0001] The invention belongs to the field of civil engineering, and relates to a circular tube self-centering buckling restraint support end connection device for reducing earthquake disasters of engineering structures. Background technique [0002] Earthquakes bring extremely serious disasters to human beings. The traditional seismic design adopts the ductility design method, that is, under the action of an earthquake, through the early yield and failure of some structural components (such as energy-dissipating supports), but the overall function will not be lost, relying on the plastic deformation of components to dissipate most Earthquake energy, so as to achieve the purpose of ensuring the safety of the main structure. Among them, buckling-restrained braces have been widely used in recent years because of their advantages such as strong energy dissipation capacity, good shock absorption effect and easy replacement after earthquakes. [0003] Buckling-re...

AI Technical Summary

Problems solved by technology

[0005] Technical problem: The present invention aims at the defect that the existing self-centering buckling restraint support has a large initial rigidity, is significantly affected by the length processing error of the casing, and is prone to breakage of the pre-tie rod when large deformation occurs, and provides a self-centering The initial stiffness of the central buckling restrained support reduces the influence of casing length processing errors, and can effectively prevent the pre-tension rod from breaking. The end connection device of the self-centering buckling restrained support of the round tube

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