A device for improving the seismic capacity of bridges

Abstract

The invention discloses a device for improving the seismic resistance of a bridge. The device includesthe bridge body, the bridge main body is laternally spaced with an expansion joint, the two e of the expansion joint are connected by connecting pieces, the two ends of the connecting piece are fixed with the outside of the bridge main body through a steel plate, a positioning plate is symmetrically welded in the middle of the steel plate, a reinforcing rib is integrally formed between the positioning plate and the edge side of the steel plate, a sleeve bar is fixed between the positioning plates, the outside of the sleeve bar is flush with one end of the positioning plate, and a column steel is connected between the sleeve bars; through the high-damping isolation rubber bearing arranged in the invention, by using the special damping formula to consume the horizontal vibration energy transmitted in the earthquake, when the earthquake comes, the vertical support to the bridge main bodywill not transfer all the energy to the bridge main body in the horizontal direction, and the vibration energy will be converted into heat consumption by using the lead core in the reciprocating seismic wave, so as to reduce the wave damage action of the horizontal seismic force on the bridge main body.

Description

technical field [0001] The invention relates to the technical field of bridge construction equipment, in particular to a device for improving the earthquake resistance of a bridge. Background technique [0002] Earthquakes can cause bridge span shortening, elongation or pier subsidence. In steep mountainous areas or sandy soil and soft clay river banks, bridges can be damaged due to landslides, bank slope sliding and rock rolling caused by strong earthquakes. Prefabricated bridge slabs often fall from the pier beams to the ground during earthquakes. At present, there is no good way to solve this problem. The reason why the bridge slab falls from the pier beam is that when an earthquake occurs, a large horizontal force is generated, which causes the horizontal displacement of the prefabricated bridge slab. When the horizontal displacement exceeds the laying width of the prefabricated bridge slab on the pier beam, The bridge slab will fall. At this time, not only the bridge ...

AI Technical Summary

Problems solved by technology

The reason why the bridge slab falls from the pier beam is that when an earthquake occurs, a large horizontal force is generated, which causes the horizontal displacement of the prefabricated bridge slab. When the horizontal displacement exceeds the laying width of the prefabricated bridge slab on the pier beam, The bridge slab will fall. At this time, not only the bridge is damaged, but also major safety accidents will occur to pedestrians and vehicles on and under the bridge, resulting in inestimable property losses.

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