A kind of multifunctional bridge shock isolation bearing

Abstract

The utility model relates to a multifunctional bridge shock-absorbing and isolating support, which is composed of upper and lower parts. The upper part is composed of PTFE plate sliding bearings, which can realize the free expansion and displacement of the main beam structure under conventional loads, and thus have all the characteristics of conventional sliding bearings. The lower part is a combined shock-absorbing and isolating device with multi-level shock-absorbing and isolating functions, which is composed of a lead rubber pad in the middle part and an elastic-plastic energy-dissipating soft steel plate in the peripheral part. A lead core is arranged in the middle of the lead core rubber pad. Under earthquake action, lead rubber pads and elastic-plastic energy-dissipating steel plates are used to jointly dissipate energy to effectively limit the relative displacement between beams and piers. A rigid connection is made between the sliding support of the polytetrafluoroethylene plate and the combined shock-absorbing and isolating device to ensure the joint work of the upper and lower parts of the device. With the worldwide emphasis on the anti-seismic fortification of engineering structures and the continuous development of the economic level, this new type of bridge anti-seismic bearing will have a wide range of engineering application prospects.

Description

Technical field [0001] The invention relates to a new type of multifunctional bridge seismic isolation support, which is particularly suitable for use in beam bridges such as simply supported beams and continuous beams in earthquake-prone areas to effectively control the relative displacement between beam piers and prevent beam drop. Background technique [0002] Earthquakes have always been a natural disaster that has seriously endangered mankind. Especially in the past 40 years, there have been many major earthquakes around the world, including the San Fernando Earthquake in the United States, the Loma Prieta Earthquake, the Tangshan Earthquake in China, the Wenchuan Earthquake, the Great Hanshin Earthquake in Japan, and the Haiti Earthquake, which have caused very heavy human lives. property loss. The common feature of these earthquake disasters is that the bridge project was severely damaged, cutting off the lifeline of the traffic in the earthquake area, causing huge diffic...

AI Technical Summary

Problems solved by technology

The second is that it will lead to excessive displacement between the main girder and the sliding device of the bridge structure, which will lead to beam falling damage due to excessive relative displacement of the beam pier during the earthquake

Obviously, any of the above-mentioned dampers cannot meet the needs of actual engineering, and it is necessary to combine the advantages of the above-mentioned three types of supports to solve this problem

Although some bridge anti-seismic colleagues have proposed such as the combined use of polytetrafluoroethylene sliding bearings and layered rubber bearings, they have not been widely accepted by the engineering community in the actual application process due to reasons such as design structure and energy consumption effects.

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