A beam-column splicing joint of steel structure with composite flange friction of shape memory alloy

Abstract

The invention discloses a shape memory alloy composite flange friction steel structure beam column splicing joint.The joint is composed of a column, a bracket, a beam, a web plate bolt, a web plate splicing plate, a shape memory alloy wire, a flange splicing plate and double nuts and bolts, wherein the bracket stretches from the column in the direction of the beam, a web plate of the bracket and a web plate of the beam are spliced through a high-strength bolt, a flange of the bracket and a flange of the beam are spliced through the double nuts and bolts, and the shape memory alloy wire is wound between the double nuts and bolts.According to the joint, energy-dissipating capacity is provided through friction damping in a small earthquake, energy-dissipating capacity is provided through friction damping and superelasticity damping together in a major earthquake, the joint can recover to the original state after the earthquake, and the joint has the advantages of being simple in structure, high in practicality, definite in stress, high in energy dissipation, capable of achieving self-restoration and the like.

Description

technical field [0001] The invention belongs to the technical field of construction engineering and relates to a beam-column splicing joint of shape-memory alloy composite flange friction, and is especially suitable for a steel frame structure with high requirements on anti-seismic self-resetting performance. Background technique [0002] Steel structure has the advantages of light weight, high strength, good seismic performance, and short construction period. It is widely used in various building structures and is one of the most widely used structural forms at present. my country is a country prone to earthquakes, and has high requirements for the seismic performance of building structures, especially the seismic problems of high-rise and super high-rise buildings. Therefore, the research on the seismic performance of steel structure system has very important social and economic significance. [0003] With the in-depth research on the anti-seismic theory and technology of...

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Problems solved by technology

In these joints, the shape memory alloys used are mainly in the form of screws, bolts, etc. However, due to the mechanical sensitivity of shape memory alloy bolts, avoiding the fracture of the threaded part at the end is a major problem hindering its safe application; in addition, currently At the same level of shape memory alloy production and processing, the performance of shape memory alloys in the form of rods or rods with larger diameters is worse than that of wires when the cost is the same; at the same time, simply using shape memory alloy materials to dissipate seismic energy will have a negative effect on Shape memory alloy materials put forward high requirements, which will largely affect the role of shape memory alloys in self-resetting nodes

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