Bridge support

Abstract

The invention relates to a bridge support and belongs to the technical field of bridge construction. The bridge support comprises an upper support plate and a lower support plate. A middle lining plate is slidably connected to the upper support plate, located below the upper support plate and slidably connected with the lower support plate through a spherical cap lining plate. The upper portion of the spherical cap lining plate is connected with the middle lining plate through a first buffer rod and located in an upper spherical face installation hole of the lower portion of the middle lining plate. The lower portion of the spherical cap lining plate is located in a lower spherical face installation hole of the upper portion of the lower support plate. The bridge support has the advantages that the external action force applied to a bridge can be counteracted through a larger rotating angle and higher rotating capacity, and the problem that acting force is directly transmitted to a bridge body due to the fact that the rotating angle of the support is limited, and accordingly, damage to the bridge is unrepairable can be solved.

Description

technical field [0001] The invention relates to a bridge bearing, which belongs to the technical field of bridge construction, in particular to a spherical bearing for a bridge. Background technique [0002] In the structural design of the bridge, it is necessary to use the bearing as the supporting part of the bridge span structure to offset the external force on the bridge, such as the pressure on the bridge when passing vehicles on both sides of the lane drive on the bridge. Taking the spherical bearing as an example, when a vehicle passes through the bridge, the spherical bearing meets the horizontal displacement requirements of the bridge through the sliding of the flat stainless steel plate and the flat PTFE plate, and through the sliding of the curved PTFE plate and the curved stainless steel plate. The sliding of the plate is used to meet the rotation of the bridge. Under normal circumstances, the support can meet the needs of actual working conditions. However, whe...

AI Technical Summary

Problems solved by technology

However, when there are heavy-duty vehicles driving on one side of the bridge, take the vehicle driving on the right side of the bridge as an example, at this time, the right side of the support is under the vertical downward pressure of the vehicle, and the vertical pressure on the right side of the support Under the action of force, the left side of the support has a tendency to move upwards, but the left side of the support cannot move upwards due to the blocking effect of the flat stainless steel plate, thus causing the spherical crown liner of the support to be unable to move vertically , only a small range of rotation can be performed on the lower curved surface, that is to say, the rotation angle of the support is limited. Part of the force is directly transmitted to the bridge girder, and even under the condition of extreme vehicle pressure on one side (for example, when there are overloaded vehicles), the support will fail, the liner will be stuck and unable to rotate, and it will not be able to offset the impact of the vehicle on the bridge girder. The force of the vehicle will eventually be transmitted to the beam itself, causing irreparable damage to the bridge

In addition, my country is an earthquake-prone country, and the seismic performance of existing spherical bearings is difficult to meet the requirements of large earthquake resistance

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