Shape-memory alloy stranded wire self-centering frictional buckling-restrained brace

Abstract

The invention provides a shape-memory alloy stranded wire self-centering frictional buckling-restrained brace, and belongs to the technical field of disaster prevention and shock absorption. The shape-memory alloy stranded wire self-centering frictional buckling-restrained brace is mainly composed of a linear steel plate inner core, an inner steel sleeve, an outer steel sleeve, friction plates, high-strength bolts, shape-memory alloy stranded wires, a left end plate, a right end plate, backing plates and anchorage devices; the two ends of the linear steel plate inner core are hinged to stiffening ribs which are connected to the left end plate and the right end plate respectively. The inner steel sleeve serves as a peripheral restriction steel sleeve to be arranged outside the linear steel plate in a sleeving mode, the linear steel plate is arranged in the inner steel sleeve in an opposite angle inclined mode, and a certain gap exists between the inner steel sleeve and the linear steel plate inner core. The inner steel sleeve is connected with the right end plate, the outer steel sleeve is connected with the left end plate, the friction plates are installed between the mutually nested portions of the inner steel sleeve and the outer steel sleeve through the high-strength bolts, and the shape-memory alloy stranded wires are anchored between the inner steel sleeve and the outer steel sleeve through the anchorage devices after being pre-stretched. By means of the shape-memory alloy stranded wire self-centering frictional buckling-restrained brace, the problem that due to the fact that for a conventional brace, excessive residual deformation occurs under the action of a large earthquake or an intermediate-earthquake, the post-earthquake maintenance and reconstruction cost is increased is solved.

Description

technical field [0001] The invention relates to the field of anti-seismic technology of civil engineering, and is an energy-dissipating and shock-absorbing member used in the field of construction engineering. The self-resetting friction anti-buckling support has good energy consumption and self-resetting capabilities. Background technique [0002] In recent years, the social and economic problems caused by earthquakes have drawn more and more attention to structural anti-seismic technology. The frame bracing system solves the problem of lateral stiffness of the structure to a certain extent, but under the reciprocating load of a large earthquake, the ordinary bracing is likely to cause failure and destruction of itself and the connection. dissipate the seismic input energy. The anti-buckling support can yield without buckling under both tension and compression, so it overcomes the shortcomings of the traditional support that the buckling strength under compression is signi...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention is to solve the problem of excessive residual deformation of buckling-resistant braces under the action of large or moderate earthquakes, resulting in increased post-earthquake maintenance and reconstruction costs and insufficient energy dissipation capacity. Reset friction anti-buckling brace

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