Steel frame with friction energy dissipation self reset device in beam

Abstract

The invention discloses a steel frame with a friction energy dissipation self reset device in a beam. The steel frame includes at least one structural unit, each structural unit includes a frame column, an I-shaped steel beam, a full-length steel plate, an upper base plate, a lower base plate, a high-strength bolt and a butterfly gasket; the two ends of the I-shaped steel beam are connected with the frame column through flange plates, the two ends of the full-length steel plate are respectively connected with the frame column in a welded mode, the upper base plate is welded on the outer side of the I-shaped steel beam, the lower base plate is located on the lower side of the full-length steel plate, the high-strength bolt is used for connecting the I-shaped steel beam, the full-length steel plate, the upper base plate, with the lower base plate as a whole, the two sides of connection faces are correspondingly provided with slopes, and the butterfly gasket sleeves the high-strength bolt. The steel frame with the friction energy dissipation self reset device in the beam can be applied in steel frames, so the structure can realize the reset energy dissipation capacity under strong earthquake, and the economic loss after the earthquake is effectively reduced.

Description

technical field [0001] The invention belongs to the field of civil engineering, and relates to a steel frame in which a friction energy consumption self-resetting device is arranged in a beam. Background technique [0002] The traditional steel frame is a lateral force ductility system widely adopted based on the anti-collapse design concept. Its basic design idea is to control the maximum interstory displacement angle of the main structure, and to meet the requirements of the earthquake through the design criteria of "strong columns and weak beams". Deformation requirements, so as to avoid the collapse of the structure during strong earthquakes, but at the same time, this yield energy dissipation mechanism at the beam end will cause serious damage and residual deformation of the structure, which will bring huge economic losses after the earthquake. Therefore, how to make buildings have a good recovery function after an earthquake has aroused widespread concern in the intern...

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Problems solved by technology

Although the post-tensioned prestressed joints have shown good self-resetting performance in the test, the following problems restrict their application in practical engineering: (1) As the beam-column joints are opened, the frame-to-column spacing will become larger, resulting in The cracking of the floor system will have a cumulative effect with the increase of the number of structural spans; (2) The tensioning of the prestressed tendons and the installation of energy dissipators need to be carried out on the construction site, which is easily affected by construction errors

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