Friction pendulum earthquake reduction and isolation support with multilayer shear force pins

Abstract

The invention discloses a friction pendulum earthquake reduction and isolation support with multilayer shear force pins. The friction pendulum earthquake reduction and isolation support is characterized in that multilayer earthquake isolation baffle rings coaxially sleeve the top of an earthquake reduction base and are fixedly connected with the earthquake reduction base by the shear force pins, slide cushion areas are arranged between the multilayer earthquake isolation baffle rings, and the inner wall of the earthquake isolation baffle ring of the innermost layer is connected with the side walls of an earthquake reduction spherical pendulum in a slide fit manner; a limit skirt which is slidably connected with the side walls of the earthquake reduction spherical pendulum is arranged at the bottom of an upper seat plate by means of manufacturing, and the swing directions of the earthquake reduction spherical pendulum can be restrained by the limit skirt. The friction pendulum earthquake reduction and isolation support has the advantages that horizontal displacement friction pendulum earthquake reduction and isolation support structural types can be controlled under the effects of medium earthquake and major earthquake, accordingly, targets on multiple properties or targets on the earthquake resistance of bridges under multilevel earthquake ground motion can be met by the friction pendulum earthquake reduction and isolation support, and the friction pendulum earthquake reduction and isolation support is high in applicability.

Description

technical field [0001] The invention relates to the technical field of bridge construction, and relates to a shock-absorbing and isolating support, in particular to a friction pendulum-type shock-isolating support with multi-layer shear pins. Background technique [0002] Earthquake is a sudden natural disaster with strong destructive power and wide range of influence, and it is extremely destructive to bridges. As one of the lifeline projects, bridge engineering is severely damaged for post-earthquake rescue work, restoration and reconstruction, and economic construction. bring great resistance. How to simply and effectively improve the aseismic performance of bridges has always been the research focus in the field of bridge aseismic. [0003] The bridge bearing is an important energy-dissipating component, which can change the dynamic response characteristics of the structure in the earthquake through a certain seismic isolation design, so as to reduce the seismic input. ...

AI Technical Summary

Problems solved by technology

[0005] The traditional friction pendulum type seismic isolation bearing has only one layer of shear pins and isolation retaining ring. Under different earthquakes, the seismic isolation displacement limit of the seismic isolation bearing is certain.

However, under different earthquakes, the seismic fortification standards of bridges are different, and the seismic performance standards of bridge supports should also be different. It is easy to cause large displacements of bearings under the action of moderate earthquakes or typhoons, which seriously affects the performance of bridges.

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