A Beam-column Joint Displacement Amplification and Damping Device with Restorable Function

Abstract

The invention discloses a beam-column node displacement amplifying and shock absorbing device with a recoverable function. A magnetorheological fluid damper is respectively installed at both ends of the displacement amplifying mechanism, and the cylinder body of the magnetorheological fluid damper at each end is It is connected with the displacement amplifying mechanism; the piston rod of one magnetorheological fluid damper is hinged to the first mounting plate, the piston rod of the other magnetorheological fluid damper is hinged to the second mounting plate, and each magnetorheological fluid damper Shape memory alloy springs are set respectively, one end of the shape memory alloy spring is connected to the cylinder body, and the other end is connected to the piston rod. The sensor is used to collect the force information of the shape memory alloy spring and send the force information to the controller. The controller is used for controlling the damping magnitude of the magneto-rheological fluid damper according to the received force information. The invention can ensure the structural safety of the frame structure under various earthquake actions, avoid severe damage to the beam-column joints, has good shock absorption and energy dissipation effects, and can reset the beam-column joints.

Description

technical field [0001] The invention belongs to the technical field of energy dissipation and shock absorption of frame structures and self-resetting of beam-column joints after an earthquake, and in particular relates to a beam-column joint displacement amplifying and shock-absorbing device with a recoverable function. Background technique [0002] In order to meet the increasingly diverse needs of architectural forms in modern society, the height and span of buildings continue to increase, so the coordinated development of structures and related design theories is required. The frame structure can better meet the functional requirements of the building, but at the same time, the frame structure also has some shortcomings: the frame joints are subjected to complex forces under the action of the earthquake, the stress concentration is significant, and the beam-column joints are seriously damaged; the lateral stiffness of the frame structure is small. Under the action of rare...

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Problems solved by technology

The frame structure can better meet the functional requirements of the building, but at the same time, the frame structure also has some shortcomings: the frame joints are subjected to complex forces under the action of the earthquake, the stress concentration is significant, and the beam-column joints are seriously damaged; the lateral stiffness of the frame structure is small. Under the action of rare earthquakes, the horizontal displacement of the structure is relatively large. After the earthquake, the general beam-column joints are seriously damaged and difficult to repair

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