Fiber pre-stretched rod type self-centering steel buckling-restrained brace

Abstract

The invention discloses a fiber pre-stretched rod type self-centering steel buckling-restrained brace, comprising I-shaped steel, two internal restrained rectangular pipes, external restrained rectangular pipes, two end plates, fiber tension rods and connecting components, wherein the connecting components are arranged at two sides of a web of the I-shaped steel; the external restrained rectangular pipes are sleeved outside the I-shaped steel and the two internal restrained rectangular pipes; two end plates are arranged at the two ends of the I-shaped steel; the fiber tension rods are connected with the two end plates; the connecting components are connected with the end plates; the internal wall at one side of the I-shaped steel is connected with one end of each internal restrained rectangular pipe and the external wall at the other side of the I-shaped steel is connected with one end of each external retrained rectangular pipe; small holes arranged in arrays are arranged on the web of the I-shaped steel; the end plates are provided with nicks which are matched with the cross sections of the I-shaped steel; the end plates are inserted in the end parts of an I-shaped steel energy-consumption unit and are in contact with the end parts of the internal restrained rectangular pipes and the external restrained rectangular pipes; the fiber tension rod is located in the internal restrained rectangular pipes, and the end plates at two ends are tightly pulled by applying pre-stressing forces; and the external sides of the two end plates are respectively connected with the connecting parts.

Description

technical field [0001] The invention belongs to the field of civil engineering and relates to a fiber pre-tensioned self-centering buckling I-shaped steel constrained support for energy dissipation and shock absorption under frequent and rare earthquakes. 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 components of the structure, but the overall function will not be lost, relying on the plastic deformation of the components to dissipate most of the seismic energy to achieve The security purpose 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] I-shaped steel is one of the main fo...

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Problems solved by technology

[0006] Technical problem: The present invention aims at the defect that the residual deformation of the existing buckling-constrained bracing system is too large, and provides a fiber pre-tensioned self-centering that can effectively reduce the residual deformation of the buckling-constrained bracing system and greatly improve the repairability of engineering structures after earthquakes steel buckling restraint brace

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