Shape memory alloy web friction self-reset steel frame joint

Abstract

The invention relates to a shape memory alloy web friction self-reset steel frame joint.The joint is composed of a column, a bracket, beams, shape memory alloy stay rope units, tensioning nuts, fixing nuts, arc hole high-strength bolts and central high-strength bolts.The bracket is welded to the side, close to the beams, of the column, a double-web mode is adopted for the bracket, and the bracket is connected with beam webs through the high-strength bolts.Arc holes are formed in the parts, at the arc hole high-strength bolts, of double webs of the bracket, the contact faces of the beam webs and the double webs of the bracket are subjected to friction treatment, friction parameters are adjusted with prestress of the high-strength bolts, the upper portions and the lower portions of the beams are connected with the column through the shape memory alloy stay rope units respectively, and the initial states of shape memory alloy stay ropes are controlled by adjusting the tensioning nuts and the fixing nuts.The shape memory alloy web friction self-reset steel frame joint has the advantages of being simple in structure, high in practicability, definite in stress, high in energy dissipation, capable of achieving self-resetting and the like.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and relates to a self-resetting steel frame node of shape memory alloy web plate friction, which is suitable for steel frame structures 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. With the in-depth research on the anti-seismic theory and technology of building structures, how to design a structure that does not cause damage during an earthquake or only undergoes rapid repair damage has gradually bec...

AI Technical Summary

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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