Buffer energy-consuming anti-drop-beam device for bridge

Abstract

The invention discloses a buffer energy-consuming anti-drop-beam device for a bridge, which can effectively resist to an earthquake disaster, prevent an adverse impact caused by over lateral displacement of the bridge and avoid the damage caused by the drop of a beam, and is convenient to mount and replace. The buffer energy-consuming anti-drop-beam device comprises an upper mounting plate which is fixedly mounted on a beam body, and a lower mounting plate which is fixedly mounted on a bridge pier. A guide groove structure is arranged at the lower end of the upper mounting plate; a transverse bridge direction guide groove of which the lower end is provided with an opening is formed in the guide groove structure. Energy consuming pieces which are made of soft steel and are provided with variable-width plate bodies are arranged between the upper mounting plate and the lower mounting plate in the transverse bridge direction at intervals; the upper parts of the energy consuming pieces are positioned in the transverse bridge direction guide groove and are restrained by the transverse bridge direction guide groove; the lower parts of the energy consuming pieces are fixedly connected with the lower mounting plate.

Description

technical field [0001] The invention relates to bridges, in particular to a bridge buffering energy consumption anti-falling beam device. Background technique [0002] With the development of social economy and the expansion of my country's traffic road network, the proportion of bridges in the line is getting higher and higher. As an important part of lifeline engineering, bridge structure is the most vulnerable part when earthquake disaster occurs. How to ensure that the bridge does not fall when the earthquake occurs is very important to the seismic design of the bridge. [0003] The anti-falling beam device is the key structure of bridge anti-seismic, which is mainly used to prevent the falling beam caused by excessive relative displacement between the upper structure and the lower structure. Therefore, anti-drop beam devices are generally used in bridge engineering in seismic intensity areas. At present, anti-fall beam devices generally adopt various anti-seismic blo...

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Problems solved by technology

[0006] 3. It can only play the role of anti-drop beam in the horizontal direction, and cannot effectively restrain the vertical vibration of the beam

[0007] 4. Rigid collision, the impact force is large. On the one hand, the anti-drop device needs a larger cross-section and consumes more materials. On the other hand, the impact on the beams and piers is also large;

[0008] 5. The difficulty of post-earthquake repairs and poor replaceability. Once damaged, it is basically impossible to repair. Even if it can be repaired, it will cost a lot of money and time. This may also lead to the risk of serious damage to the bridge in the strong aftershock

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