Sliding groove type friction pendulum high-pier bridge seismic mitigation and isolation bearing

Abstract

Disclosed are a sliding groove type friction pendulum high-pier bridge seismic mitigation and an isolation bearing. The bearing includes an upper connecting steel plate, a lower connecting steel plate, and a frictional sliding component clamped between the upper connecting steel plate and the lower connecting steel plate. The frictional sliding component includes an upper bearing plate, a lower bearing plate, and a hyperbolic spheroid. The upper bearing plate and the lower bearing plate are disposed on corresponding connecting steel plates, and are mounted and cooperate by using a plurality of parallel protrusions and grooves. The hyperbolic spheroid is disposed between the upper bearing plate and the lower bearing plate. A plurality of hysteretic damping components, bearing positioning structures, butterfly-shaped spring components, and bearing limiting structures are disposed on opposite surfaces of the upper bearing plate and the lower bearing plate in a circumferential direction.

Description

FIELD OF THE INVENTION[0001]The present invention pertains to the field of building and bridge structure technologies, and specifically, to a sliding groove type friction pendulum high-pier bridge seismic mitigation and isolation bearing.BACKGROUND OF THE INVENTION[0002]Earthquakes are sudden and devastating. Although an earthquake usually lasts for dozens of seconds, it causes a tremendous loss of life and property. This is unmatchable by other natural disasters. Examples of earthquakes are a magnitude 8.0 earthquake in Wenchuan in 2008 and a magnitude 7.1 earthquake in Yushu, Qinghai in 2010. Likewise, there are also records of similar terrible seismic disasters abroad, for example, a magnitude 8.9 earthquake off the coast of Honshu, Japan in 2011 and a magnitude 8.8 earthquake in Bio Bio Province, Chile, in 2010. Although people have made great progress in both seismic knowledge and engineering seismic resistance over recent decades, earthquakes still have caused horrible heavy l...

AI Technical Summary

Benefits of technology

The solution effectively reduces excessive displacement and rotation, absorbs massive seismic energy, and ensures the bridge's stability and integrity during earthquakes, preventing falling and facilitating faster recovery by utilizing resilient deformation and hysteresis features.

Problems solved by technology

Earthquakes are sudden and devastating.

Although an earthquake usually lasts for dozens of seconds, it causes a tremendous loss of life and property.

This is unmatchable by other natural disasters.

Although people have made great progress in both seismic knowledge and engineering seismic resistance over recent decades, earthquakes still have caused horrible heavy losses and great casualties.

Seismic disasters at home and abroad show that, damage or collapse of a bridge in a seismic region not only hinders disaster relief actions at the time, but also affects restoration and reconstruction of the bridge after the disaster.

However, the bridge bearing is also a weakest part in bridge seismic resistance.

These bearings have their own advantages, but still have some disadvantages in actual application processes.

The lead rubber bearing has poor durability and a low bearing capacity, and may be aged easily.

In addition, lead in the lead rubber bearing may cause environmental pollution or the like.

The polyurethane spring ball bearing has poor durability, and after yielding to external force, has little displacement.

The planar frictional sliding bearing has poor pullout resistance or overturn resistance performance, has no restoration capability, and therefore, when applied, needs to cooperate with other types of bearings that have restoration force.

However, this causes a series of problems such as a huge structure and cost increase.

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