A friction pendulum type shock isolation bearing with multi-layer shear pins

Abstract

A friction pendulum shock-absorbing and isolating support with multi-layer shear pins, the top of the shock-absorbing base is coaxially fitted with a multi-layer shock-isolation retaining ring, and the shock-isolation retaining ring is fixedly connected to the shock-absorbing base through the shear pins, And there is a sliding buffer zone between the multi-layer shock-absorbing retaining rings, wherein the inner wall of the innermost shock-absorbing retaining ring is slidably connected with the side wall of the shock-absorbing ball pendulum; The wall is slidably connected to limit the limit skirt seat that limits the swing direction of the shock-absorbing ball pendulum. The friction pendulum shock-isolation bearing can separately control the horizontal displacement of the friction pendulum shock-isolation bearing under the action of moderate earthquake and large earthquake, so that the bearing can meet the multi-performance objectives or the earthquake resistance of bridges under multi-level earthquakes The performance target makes the applicability of the bearing stronger.

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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