Beam column node displacement amplification damping device having recoverable function

Abstract

The invention discloses a beam column node displacement amplification damping device having a recoverable function. The beam column node displacement amplification damping device having the recoverable function is characterized in that two magnetorheological fluid dampers are respectively installed at two ends of a displacement amplification mechanism, a cylinder body of the magnetorheological fluid damper at each end is connected with the displacement amplification mechanism, a piston rod of one magnetorheological fluid damper is hinged with a first installing plate, a piston rod of the othermagnetorheological fluid damper is hinged with a second installing plate, a shape memory alloy spring is arranged on each magnetorheological fluid damper in a sleeving mode, one end of each shape memory alloy spring is connected with the cylinder body of the corresponding magnetorheological fluid damper, the other end of each shape memory alloy spring is connected with the piston rod of the corresponding magnetorheological fluid damper, a sensor is used for collecting stress information of the shape memory alloy springs and sending the stress information to a controller, and the controller isused for controlling the magnitude of damping force of the magnetorheological fluid dampers according to the received stress information. The beam column node displacement amplification damping device having the recoverable function can guarantee structure safety of a frame structure under the action of various earthquakes, prevents beam column nodes from being severely damaged, has excellent shock absorption and energy dissipation effect, and can reset the beam column nodes.

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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