Laminated magneto-rheological vibration isolation support based on transmission lifting device

Abstract

The invention belongs to the field of bridge vibration isolation, and particularly relates to a laminated magneto-rheological vibration isolation support based on a transmission lifting device. The support comprises an upper steel disc, a lower steel disc, an upper permanent magnet, a lower permanent magnet, a laminated supporting mechanism, a lead core, a lower supporting shell and a lifting device, the upper permanent magnet is attracted to the bottom face of the upper steel disc, the lower permanent magnet is arranged in the lower supporting shell, and the lower permanent magnet moves up and down in the lower supporting shell through the lifting device. The laminated supporting mechanism is cylindrical and is formed by alternately vulcanizing magneto-rheological elastomers and steel plates, and a through hole is formed in the center of the laminated supporting mechanism; the lead core is arranged in a through hole of the laminated supporting mechanism in a penetrating mode, and thelower end of the lead core is fixedly connected with the lower supporting shell. According to the vibration isolation support, the distance between the upper permanent magnet and the lower permanent magnet is changed through the lifting device, a magnetic field with the adjustable strength is generated, particularly, the shearing modulus in the horizontal direction is large enough, and the large shearing force effect in the horizontal direction can be resisted.

Description

technical field [0001] The invention belongs to the field of bridge vibration isolation, and in particular relates to a laminated magnetorheological vibration isolation support based on a transmission lifting device. Background technique [0002] When the bridge is threatened by earthquake action, it often produces a large impact destructive force and displacement at the pier-beam joint, resulting in damage to the bridge structure, so the vibration isolation structure is particularly important. The vibration isolation structure is installed between the foundation and the vibration isolation object to reduce the seismic energy transmitted from the foundation to the vibration isolation object, and to block the transmission of seismic energy to the upper structure, thereby reducing the damage of the upper structure during an earthquake. The seismic isolation technology has a clear idea of ​​shock absorption and obvious shock absorption effect, which can effectively resist earth...

AI Technical Summary

Problems solved by technology

The lifting device is used to carry the load, the vertical rigidity is poor, and the lifting structure is complicated, the lifting amount is small, and the overall height of the structure is relatively high

[0007] The above-mentioned invention patents can increase the overall stiffness of the structure. When resisting large external loads (sudden vibrations, earthquakes), they can effectively protect the overall strength of the structure and reduce structural damage, but the ability to resist horizontal shear force is weak. And the structure is relatively complex, the height is not good, and the energy consumption is large

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