Magnetic fluid variable-damping energy dissipation bracing with reset function

Abstract

The invention provides a magnetic fluid variable-damping energy dissipation bracing with a reset function. The middle portion of an inner pipe is sleeved with two permanent magnets. The two permanent magnets are sleeved with magnetism insulation rings. Pistons are fixedly arranged on the left side and the right side of the permanent magnets and the magnetism insulation rings. The pistons are sleeved with a cylinder barrel. Sealing end plates are fixedly arranged at the two ends of the cylinder barrel. The sealed space defined by the cylinder barrel, the inner pipe, the pistons and the sealing end plates is filled with magnetorheological liquid. The two ends of the inner pipe are sleeved with a left side disc spring and a right side disc spring correspondingly. The two ends of the left side disc spring and the two ends of the right side disc spring are each provided with a disc spring end plate. The inner pipe is sleeved with center holes of the disc spring end plates and center holes of the sealing end plates. Each disc spring end plate and each sealing end plate are each provided with four guide shaft holes. Guide shafts are sleeved with the guide shaft holes. By means of changes of the width of a damping channel, the pistons extrude the magnetorheological liquid to overcome the shear yielding force which is generated through solidification under the effect of a permanent magnetic field and is increased along with increase of the displacement amplitude, the component slide start force is small, and the magnetic fluid variable-damping energy dissipation bracing has good energy consumption capacity.

Description

technical field [0001] The invention relates to the technical field of magnetic fluid dampers, in particular to a magnetic fluid variable damping energy dissipation support with a reset function. Background technique [0002] Earthquakes are sudden natural disasters that endanger people's lives and property. Studies have shown that when the residual deformation angle of the structure after earthquake is greater than 0.5%, the maintenance cost is greater than the reconstruction cost. When a building is subjected to a strong earthquake with a higher fortification intensity than the local area, even if the overall integrity of the structure is maintained, due to excessive deformation and severe damage to some components, extensive reinforcement and repair are required, and even the construction can only be knocked down and reconstructed. It has caused huge waste and affected people's normal life. For this reason, scholars at home and abroad have put forward "recoverable funct...

AI Technical Summary

Problems solved by technology

Under the action of a magnetic field, the magnetorheological fluid can change from a Newtonian fluid with good fluidity to a high-viscosity, low-fluidity Bingham viscoplastic in milliseconds, and the piston squeezes the magnetorheological fluid to overcome the solidification in the damping channel. The shear yield force provides the damping force. The magnetorheological damper has the advantages of large output, low energy consumption, and fast response. However, the traditional magnetorheological damper has no reset function and cannot provide restoring force. Usually, it has Large residual deformation cannot effectively guarantee the safety of structures under earthquakes

[0006] Therefore, it is necessary to provide a magneto-fluid damping energy-dissipating support with a reset function to solve the problem of large sliding force of the existing self-reset components, while taking into account the advantages of magneto-rheological fluid and disc springs

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