Infrastructure large-load multidirectional vibration isolation and reduction device and disaster prevention method thereof

Abstract

The invention relates to an infrastructure large-load multidirectional vibration isolation and reduction device and a disaster prevention method thereof. The device comprises an upper end cover, a base, a vertical vibration reduction part, horizontal vibration reduction parts and the like. Under the action of a vertical load, a pressing cylinder of the upper end cover of the device extrudes a belleville spring of the vertical vibration reduction part, a pressing shaft extrudes energy dissipation and vibration reduction blocks of the vertical vibration reduction part, and the belleville springand the energy dissipation and vibration reduction blocks isolate and consume vibration in the vertical direction together. The base is provided with a limiting table to ensure that the vertical displacement of a main structure is within an allowable range. Under the action of horizontal earthquakes, viscoelastic damping materials of the horizontal vibration reduction parts plays a role in energydissipation and damping through compressive deformation. Under the action of torsion or eccentricity, oblique force transmission units ensure that the device does not roll over or overturn through thespatial arrangement of the oblique force transmission units. The device has the advantages of being large in bearing capacity, high in damping and capable of achieving multi-direction vibration isolation and reduction, and good energy dissipation capacity is provided for the device through the use of the energy dissipation vibration reduction blocks.

Description

technical field [0001] The invention belongs to the technical field of disaster prevention and vibration reduction for infrastructures such as rail transit and nuclear power plants, and in particular relates to a multi-directional vibration isolation device and a disaster prevention method for large loads of infrastructures. Background technique [0002] Important infrastructures such as rail transit and nuclear power plants are subject to large dynamic loads during operation, including vertical dynamic loads caused by trains, generator sets and other equipment and horizontal excitations caused by earthquakes. High-speed railways and urban rail transit generally adopt a slab track structure. When the train is running, track irregularities and other wheel-rail disturbances cause track and train vibration, which affects the safety and comfort of train operation. In addition, vibration energy and noise along the track structure It is transmitted downward, causing secondary vibr...

AI Technical Summary

Problems solved by technology

The lead-core rubber bearing can well consume the horizontal seismic action, but the vertical stiffness is relatively large, and the vertical vibration damping ability is weak

The spiral steel spring vibration isolation bearing can isolate heavy equipment and prevent vibration from being transmitted to the main structure to a certain extent, but its damping is relatively small, energy dissipation capacity is poor, rigidity is low, and the bearing capacity is weak

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