A high-velocity anti-shock and wide-frequency domain shock isolator for bridges

Abstract

The invention discloses a bridge high-speed impact-resistant broad frequency domain shock-isolator. The bridge high-speed impact-resistant broad frequency domain shock-isolator comprises a high-damping rubber shock-isolation structure composed of a high-damping rubber supporting seat, an upper bearing platform plate and a lower bearing platform plate and a viscous damper shock-absorption structurecomposed of a sliding groove, a polytetrafluoroethylene material layer, an upper connecting piece, a lower connecting piece, a damping cylinder body, a plurality of pistons, a piston rod, a damping chamber, an end cover, a guide sleeve, a sealing piece and a connecting block. The bridge high-speed impact-resistant broad frequency domain shock-isolator can effectively isolate shock and absorb vibration in horizontal various directions for civil engineering structures under complex vibration excitation, overcomes the defects of limited energy consumption capacity, single damping force, low accuracy and sensitivity of a traditional rubber supporting seat and narrow shock isolation frequency and single shock isolation direction of a single viscous damper, and can realize energy consumption and vibration absorption in horizontal various directions, and simultaneously has wider shock isolation frequency, higher energy consumption capacity and sensitivity and high-speed impact-resistant characteristics compared with an existing shock-isolator.

Description

technical field [0001] The invention relates to the technical field of seismic isolation of civil engineering structures, in particular to a high-rate impact-resistant wide-frequency domain seismic isolator for bridges. Background technique [0002] The damage to the structure caused by the earthquake and the impact of the vibration in the daily environment cannot be ignored. In order to reduce the impact of the vibration on the structure, different from the traditional anti-seismic technology that uses rigidity to overcome rigidity, various seismic isolation Vibration reduction means came into being. The effect is good in the application, for example, the natural rubber bearing used in the traditional seismic isolation bearing has a low horizontal stiffness, which prolongs the natural vibration period of the structure and can significantly reduce the horizontal acceleration response of the structure, but there are also many problems, such as its displacement response The h...

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Problems solved by technology

[0006] In order to solve the problems existing in the prior art, the present invention provides a bridge high-speed impact-resistant wide-frequency shock isolator based on shear thickening materials, viscous dampers and high-damping rubber bearings, which can be used for civil engineering structures Effective shock isolation and vibration reduction in the horizontal and anisotropic directions under complex vibration excitation, the introduction of the shear thickening fluid damper makes the device have a higher energy consumption and vibration reduction effect under the action of high-frequency vibration, and the middle part is high damping rubber The support mainly bears the vertical load, and at the same time, it also has the function of vibration reduction and energy consumption at low frequencies. At high frequencies, the high-damping rubber Sensitivity and high-speed anti-shock characteristics can realize energy dissipation and vibration reduction in all directions horizontally, overcoming the defects of traditional rubber bearings such as limited energy dissipation capacity, single damping force, low precision and sensitivity, and single viscous damper vibration isolation frequency Defects of narrow and single isolation direction

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