Graded energy consumption type self-resetting buckling-restrained restraint device based on annular SMA inhaul cables and manufacturing method

Abstract

The invention relates to a graded energy consumption type self-resetting buckling-restrained restraint device based on annular SMA inhaul cables and a manufacturing method, and belongs to the technical field of structural seismic resistance and post-earthquake recoverability. The graded energy consumption type self-resetting buckling-restrained restraint device comprises a cover plate, a steel plate energy dissipation inner core, a filling plate, a small-diameter high-strength bolt and a large-diameter high-strength bolt. The steel plate energy dissipation inner core comprises an A-type steel plate energy dissipation inner core and a B-type steel plate energy dissipation inner core; and two kinds of long-strip-shaped holes are formed in the length direction, and the annular SMA inhaul cables and the high-strength bolt exerting pretightening force can penetrate through the long-strip-shaped holes. Under the action of normal operation or small earthquakes, the deformation requirement of the structure is met through a limiting sliding connection assembly; under the action of a medium earthquake, relative displacement of energy dissipation steel plates enables the annular SMA inhaul cables to be pulled, the self-resetting capacity of the device is activated, and the first-stage energy dissipation capacity of a friction device between the energy dissipation steel plates is activated; and under the action of a large earthquake, the high-strength bolts start to make contact with the hole walls, the energy dissipation steel plates start to enter plasticity, and the secondary energy dissipation capacity of the device is further activated.

Description

technical field [0001] The invention relates to a hierarchical energy-dissipating self-resetting anti-buckling restraint device and a manufacturing method based on an annular SMA cable, and belongs to the technical field of structure anti-seismic and post-earthquake recoverability. Background technique [0002] Although the existing structural ductile anti-seismic design and anti-seismic design have effectively realized the anti-seismic design concept that the structure will not collapse after the earthquake, the residual displacement of the structure after the earthquake will increase the difficulty of structural repair, and even lead to the loss of structural functions, making direct or The indirect economic losses are huge, so the demand for structural recoverability after earthquakes is very urgent. [0003] At present, the energy dissipation capacity of anti-buckling restrained braces under earthquake action is very considerable, but the plastic deformation cannot be re...

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Problems solved by technology

[0002] Although the existing structural ductile seismic design and seismic isolation design have effectively realized the seismic design concept that the structure will not collapse after the earthquake, the residual displacement of the structure after the earthquake will increase the difficulty of structural repair, and even lead to the loss of structural functions, making direct or The indirect economic losses are huge, so the demand for structural recovery after earthquakes is very urgent

[0003] At present, the energy dissipation capacity of anti-buckling rest

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