Energy dissipation self-reset bridge anti-seismic structure

Abstract

The invention discloses an energy dissipation self-resetting bridge anti-seismic structure comprising concrete anti-vibration stoppers on pier cover beams on both sides of bridge main girder, energy dissipation blocks made of two arc-shaped elastic plates are arranged in the gap between bridge main girder and concrete anti-vibration stoppers, two ends of two arc-shaped elastic plates are fixedly connected by connecting pieces, and a shuttle-shaped energy dissipation cavity is formed in the middle part of two arc-shaped elastic plates; A plurality of horizontal outward extending pulling bolts are evenly spaced along the height direction in the middle of the plate wall of the two arc-shaped elastic plates, and the two arc-shaped elastic plates are fixedly connected with the bridge main girder and the concrete anti-seismic retaining blocks on both sides through the pulling bolts respectively. The invention has the advantages of simple structure, simple installation and low cost. The rigidcollision between the bridge girder and the concrete anti-seismic retaining block is transformed into flexible collision, which can effectively cushion the impact force between them. The energy dissipation blocks on both sides act at the same time to consume seismic energy, avoid the phenomenon of transverse beam falling, and make the bridge girder have a certain self-resetting ability.

Description

technical field [0001] The invention relates to the field of bridge anti-seismic technology, in particular to an energy-dissipating self-resetting bridge anti-seismic structure arranged on both sides of a bridge pier cover beam. Background technique [0002] In our country, in order to prevent the bridge main girder from falling during an earthquake, the concrete anti-seismic stoppers that block the bridge main girder are usually set on the bridge pier cover beam, and the structural reinforcement design is carried out in the concrete anti-seismic block; The anti-seismic effect is improved, but it is difficult to effectively control the anti-seismic performance indicators such as the strength and stiffness of the concrete anti-vibration block, and then it is impossible to ensure that the concrete anti-vibration block realizes its expected limit function under the action of earthquakes. In addition, the concrete anti-vibration blocks conventionally installed on both sides of t...

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Problems solved by technology

[0002] In our country, in order to prevent the bridge main girder from falling during an earthquake, the concrete anti-seismic stoppers that block the bridge main girder are usually set on the bridge pier cover beam, and the structural reinforcement design is carried out in the concrete anti-seismic block; The anti-seismic effect has been improved, but it is difficult to effectively control the anti-seismic performance indicators such as the strength and stiffness of the concrete anti-vibration block, and it is impossible to ensure that the anti-seismic block of the concrete will realize its expected limit function under the action of the earthquake

In addition, the concrete anti-vibration blocks conventionally installed on both sides of the bridge pier cover girder have low ductility and weak energy dissipation capacity, and only one block on both sides of the cover girder works when limiting the lateral displacement of the bridge girder. It cannot work at the same time; and under the action of strong earthquakes, the main girder of the bridge is prone to large lateral displacement and collides with the block. The main reason is that the lateral displacement of the main girder of the bridge has not been effectively restrained under the earthquake, and the seismic energy has not been effectively reduced or dissipated; and after the end of the earthquake force, the main girder of the bridge cannot be reset, which seriously affects the traffic order

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