Structural system of double-column rocking seismically isolated pier

Abstract

The invention provides a double-column type swinging shock-insulation bridge pier structure system and belongs to the field of bridge engineering. The structure system is mainly composed of an upper structure, a reinforced concrete bridge pier section and a steel pipe concrete bridge pier section, a bearing platform, a steel pipe concrete bolt pin, a non-binding pre-stress steel bar and the like. The steel pipe concrete bridge pier section is connected with the upper structure through the non-binding pre-stress steel bar; and with the help of an external energy consumption device and a metal annular object, the shock-insulation effect and the self-resetting capability of a bridge structure can be effectively provided. The structure system designed by the invention has a definite stress mechanism; under the condition of ensuring that the structure system has enough intensity and rigidity, the earthquake effect borne by the structure is reduced, and the effective energy consumption capability and self-resetting capability can be provided; and the problems of a traditional double-column type bridge pier structure system that a support is replaced in a life period and the system is seriously damaged and has large residual deformation after the earthquake effect can be solved.

Description

technical field [0001] The invention belongs to the field of bridge engineering. In particular, it relates to a double-column rocking seismic-isolation pier structure system that uses unbonded prestressing technology and energy-dissipating components to control the seismic response and residual deformation of the structure. Background technique [0002] my country is located between the circum-Pacific seismic belt and the Eurasian seismic belt. Most of the country is an earthquake zone, especially the western part of my country is mostly a strong earthquake zone with frequent seismic activities. The bridge is a pivotal project of the traffic lifeline, and its construction cost is high. Once it is damaged by an earthquake, it will cause huge economic losses, and it is extremely difficult to repair after the earthquake. The number of casualties directly on the bridge was not many, but the economic losses and casualties caused by the damage and interruption of traffic lifeline...

AI Technical Summary

Problems solved by technology

Therefore, the bridge structure using shock-absorbing and isolating bearings may suffer serious damage to the bridge, or even drop beams and collapse under the action of rare earthquakes.

At present, the commonly used seismic isolation bearings are laminated steel plate rubber bearings (lead rubber bearings, high damping rubber bearings, etc.), and their design service life is 50 years, while the design life of bridge engineering is generally 100 years. The performance and durability of roof steel plate and rubber are poor, and it is extremely difficult to replace the support. It is difficult to solve this problem with the existing bridge isolation support, so the cost of the bridge's entire life cycle increases

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