Sliding lead-core shock absorption and insulation rubber support for bridge

Abstract

The invention discloses a sliding lead-core shock absorption and insulation rubber support for a bridge. The rubber support comprises a lead-core rubber support body, an upper connecting plate fixedly arranged at the upper end of the lead-core rubber support body, a lower connecting plate fixedly connected to the lower end of the lead-core rubber support body, and a sliding plate arranged at the upper part of the upper connecting plate and matched with the upper connecting plate in a sliding way, wherein the sliding plate is anchored on the bridge, and the lower connecting plate is anchored on a bridge pier. Based on the existing lead-core rubber support, the sliding mechanism is added to the invention; when environmental temperature difference occurs after the construction or in the lastperiod of the construction, the lead-core rubber support can horizontally slide to overcome the deformation caused by temperature difference and concrete shrinkage and gradual change in the normal use, thereby preventing the yielding of the lead core in normal use and avoiding the fatigue damage of the lead-core rubber support; in addition, the rubber support can have stronger deformation capacity when an earthquake occurs and play a role of shock absorption and insulation.

Description

technical field [0001] The invention relates to a bridge component, in particular to a bridge sliding type lead rubber shock-absorbing and isolating bearing. Background technique [0002] The anti-seismic design and anti-seismic measures of the bridge structure are the necessary conditions to ensure that the bridge will not be damaged or damaged and will not collapse during an earthquake and can be repaired. In order to improve the anti-seismic performance of structures, seismic isolation design is widely used. Seismic isolation technology refers to the use of seismic isolation devices to separate the structure from the seismic movement that may cause damage as much as possible to reduce the seismic force and energy transmitted to the structure. In the prior art, this kind of separation is generally achieved by increasing the flexibility of the system and providing appropriate damping. The principle is to rely on seismic isolation devices to extend the natural vibration per...

AI Technical Summary

Problems solved by technology

[0004]However, the upper and lower ends of the existing lead rubber bearings are fixedly connected to the bridge and the piers during construction, and the bridge itself will shrink and deform after construction; When the ambient temperature is different, the bridge will also deform. The lead rubber bearing cannot overcome the deformation caused by the temperature difference and the shrinkage and creep of the concrete during normal use. The lead core will yield when there is no earthquake, which will cause the entire lead rubber bearing. Fatigue damage caused by the seat, and the proper shock absorption and isolation effect cannot be achieved when the earthquake occurs

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