Anti-seismic bridge support

Abstract

The invention relates to an anti-seismic bridge support. The support comprises a first-stage anti-seismic shock-absorbing structure and a second-stage anti-seismic shock-absorbing structure, the first-stage anti-seismic shock-absorbing structure drives baffle rods to move upwards through the rotation of cams, and jacking rods cooperate with baffle blocks at the two sides of the lower portion of across beam to limit the horizontal displacement of the cross beam; the second-stage anti-seismic shock-absorbing structure drives first gears to rotate through the vertical displacement of the jackingrods in the baffle rods and then transmits the rotation to first bevel gears through retractable universal couplings, the first bevel gears are connected with second-stage anti-seismic devices to achieve bevel self-locking of pistons and pressing blocks, and therefore second-stage anti-seismic protection is achieved; meanwhile, through a bridge pier is protected through a linkage mechanism underthe cross beam; the anti-seismic bridge support limits the displacement of the bridge cross beam well, the beam falling risk is avoided, and the structural seismic damage and the structural damage degree are reduced; meanwhile, the anti-seismic bridge support achieves two-stage seismic protection, the anti-seismic capability of a bridge is greatly improved, the buffer protection capability of thebridge pier during an earthquake can also be improved, and the anti-seismic effect is remarkable.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, in particular to an anti-seismic bridge support. Background technique [0002] An earthquake is a phenomenon of propagating vibrations that occurs when a part of the earth's interior moves rapidly. When a major earthquake breaks out, it releases huge seismic energy, causing a lot of damage to the surface and man-made engineering, seriously threatening the safety of people's lives and property. The damage to bridges by earthquakes directly affects the smoothness of lifelines in the process of earthquake relief. Therefore, how to improve the seismic capacity of bridges and reduce the damage to bridges caused by earthquakes is a very important issue. [0003] People's travel has gradually developed from walking to transportation, such as cars, trains, airplanes, ships, etc., and a series of roads, railways, etc. When it develops into aerial construction, under such conditions, the role...

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Problems solved by technology

[0003] People's travel has gradually developed from walking to transportation, such as cars, trains, airplanes, ships, etc., and a series of roads, railways, etc. When it develops into aerial construction, under such conditions, the role of bridges is becoming more and more important, because in the construction of long-distance roads, it is often necessary to cross rivers, valleys and other places, so it is necessary to connect through bridges. During construction, the bridge bearing is an important component that connects and constrains the upper and lower structures of the bridge. It is an indispensable part for the load-bearing of the bridge. Displacement can easily cause structural damage to the bridge, leading to interruption of traffic, bringing great difficulties to disaster relief work and causing huge losses

[0004] In the existing anti-seismic and shock-absorbing devices, there is still relatively large relative displacement between the upper and lower structures of the shock-absorbing layer. In strong earthquakes, this effect is more obvious, and it is easy to cause rigid damage to the bridge and the danger of falling beams, and it is impossible to carry out effective monitoring of the pier. protection of

When an earthquake strikes, the vibration frequency between the abutment and the main girder is inconsistent, which may easily cause the main girder to move sideways

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