Prefabricated composite energy-dissipated steel beam and column structure with multi-stage damping and secondary amplification of displacement

Abstract

The invention discloses a prefabricated composite energy-dissipated steel beam and column structure with multi-stage damping and secondary amplification of displacement. The prefabricated composite energy-dissipated steel beam and column structure comprises a prefabricated steel beam, a prefabricated steel column, energy dissipation walls, notches, door and window holes, an upper connecting plate,a lower connecting plate, a vertical type moving displacement support, a displacement amplification rod, a L-shaped fixed support, a U-shaped sliding rod, lug plates, a gear rotating shaft, bolt pins, bolts, front and rear cover plates, fan-shaped notches, column type bearing blocks, limiting rotating plates, an annular groove, shear-resistant keys, shearing blocks, an outer circular ring, low yield point steel and an inner limiting ring. The prefabricated composite energy-dissipated steel beam and column structure is clear in energy dissipation mechanism, realizes multistage control energy dissipation and gives full play to the functions of each energy dissipation part at different stages through shear deformation of the shearing blocks and the yield energy dissipation of the low yield point steel. Furthermore, the horizontal displacement between layers of a structure is subjected to secondary amplification, the efficiency of energy dissipation is improved, the damage and failure ofa main body of a steel structure can be effectively reduced, and replacement is convenient after the earthquake or after the damage.

Description

technical field [0001] The invention relates to an assembled composite energy-dissipating steel beam-column structure capable of multi-stage vibration reduction and displacement secondary amplification, and belongs to the technical field of vibration reduction control and assembled structures of structural engineering. Background technique [0002] In recent years, with the improvement of science and technology and the rapid development of the economy, the comprehensive national strength has been further enhanced, and a large number of steel structure buildings have emerged in various economically developed regions. Due to the advantages of light weight, diverse structural forms, wide application range, high construction efficiency and environmental protection, multi-high-rise steel structures have been developed rapidly, solving the problems of scarcity of building land and environmental protection. At the same time, it also brings new problems to engineers and scientific r...

AI Technical Summary

Problems solved by technology

Now people prefer to use energy-dissipating devices installed on the structure for effective vibration reduction. The existing energy-dissipating components also have shortcomings. The damper can provide a large lateral stiffness for the structure, but it often cannot fully dissipate energy under frequent earthquakes or wind vibrations, and the shock absorption effect is poor, that is, the existing damper cannot fully realize multi-stage energy consumption and vibration reduction

Moreover, the energy dissipation devices are generally arranged between layers with large relative displacements, but the small displacement between layers will limit the full performance of the energy dissipation devices to a certain extent. Researchers also use different connection methods to enlarge the interlayer Horizontal displacement is used to improve the shock absorption effect of energy-dissipating parts on the structure. The commonly used methods are diagonal connection, horizontal connection, elbow connection and scissors connection. The above connection methods can indeed improve the shock absorption effect by amplifying the horizontal displacement between floors. The connection method is complicated, the shock absorption effect is limited, and it takes up a lot of space, and the layout location has certain limitations, which has a certain impact on the building space and the beauty of the building.

[0004] At present, the damage and collapse of multi-story steel structures under strong earthquakes is due to excessive interstory displacement. After the installation of dampers, the interstory horizontal displacement will be reduced, so that the energy consumption efficiency of the dampers will be reduced, and serious damage will occur to the walls. damage, and its poor energy dissipation capacity is not easy to replace after the earthquake

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