Anti-seismic device for reinforcing old bridge

Abstract

The invention provides an anti-seismic device for reinforcing an old bridge. The device comprises a check block fixing system and an energy dissipation and seismic mitigation system, the check block fixing system comprises fixing plates and bolts, the fixing plates are arranged on the three side faces of an anti-falling beam check block, and the fixing plates are fixedly connected to the anti-falling beam check block in a manner that the bolts are inserted into the anti-falling beam check block; the energy dissipation and seismic mitigation system is located between the anti-falling beam checkblock and a main beam and comprises two energy dissipation plates, two elastic thin plates, four stiffening plates and four sealing plates, the two energy dissipation plates are arranged in a crossedmanner, the cross sections, in the direction perpendicular to the length direction of the main beam, of the two energy dissipation plates are of an X-shaped structure, and the side, right opposite tothe main beam, of the X-shaped structure and the side, back to the main beam, of the X-shaped structure are provided with the elastic thin plates; the four stiffening plates are arranged at the foursides of the X-shaped structure respectively; and the four sealing plates are arranged at the four sides of the X-shaped structure respectively, the four sides are not the sides where the two elasticthin plates are located, and each sealing plate is fixedly connected with the two energy dissipation plates. An anti-seismic stopper designed by the invention is additionally arranged on the existingold bridge, so that the anti-seismic capability of the old bridge can be improved.

Description

technical field [0001] The invention relates to the field of anti-seismic bridges, in particular to an anti-seismic device for reinforcing old bridges. Background technique [0002] With the development of my country's transportation construction, the number of bridges has ranked first in the world. Among these existing bridges, the number of small and medium-span bridges accounts for more than 95%. However, due to the lack of anti-seismic theory of bridges in the early stage, the anti-seismic design of bridges was not considered comprehensively. Especially in the early stage of bridges with small and medium spans, only anti-falling beam stoppers were often installed. Such blocks not only have no seismic effect, And because the design rigidity is not enough, once an earthquake occurs, it is easy to be damaged, and the protection effect cannot be achieved at all. The survey results of bridge structures after many earthquakes in China have also confirmed that the existing ol...

AI Technical Summary

Problems solved by technology

However, due to the lack of anti-seismic theory of bridges in the early stage, the anti-seismic design of bridges was not considered comprehensively. Especially in the early stage of bridges with small and medium spans, only anti-falling beam stoppers were often installed. Such blocks not only have no seismic effect, And because the design rigidity is not enough, once an earthquake occurs, it is easy to be damaged, and the protection effect cannot be achieved at all.

The survey results of bridge structures after many earthquakes in China have also confirmed that the existing old bridges are often prone to damage when faced with earthquakes, and cannot resist the destructive effects of earthquakes at all.

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