Steel damping shock absorption anti-falling beam support

Abstract

The invention relates to a steel damping shock absorption anti-falling beam support. The beam support comprises an upper support plate, a spherical crown, a middle support plate and a lower support plate, wherein sliding friction pairs are arranged between the upper support plate and the spherical crown, between the spherical crown and the middle support plate and between the middle support plate and the lower support plate, and directional slide ways and annular steel damping elements are arranged between the upper support plate and the spherical crown and between the middle support plate and the lower support plate. Under the normal use condition of a bridge, displacement requirements of the main beam under the load effects of temperature, shrinkage and creep, vehicle braking force and the like can be met; when an earthquake comes, when the shearing force borne by the support exceeds a set capacity value, the pin is cut off, the upper seat plate and the spherical crown or the middle seat plate and the lower seat plate generate translational friction slippage along the slide way, and inertia force generated by the main beam is prevented from being continuously transmitted to the pier; the annular steel damping elements on the supports play a role to dissipate earthquake energy, when the displacement of the pier beam is increased to a certain degree, the annular steel damping elements can make contact with the limiting blocks, the steel damping elements are prevented from continuously deforming to form pull rods, and the beam falling prevention effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of shock-absorbing and isolating components for bridge engineering, and relates to a steel damping, shock-absorbing and anti-drop beam support. Background technique [0002] Bearings are functional components that connect bridge girders and piers. The fixed support can realize the displacement constraint on the main girder under the normal use condition of the bridge; the movable support can satisfy the expansion and contraction of the main girder under the normal use condition. In a simply supported girder bridge, one end of the girder uses a fixed support and the other end uses a movable support; in a continuous girder bridge, only one pier in a link uses a fixed support, and the rest of the piers are arranged with movable supports. [0003] Under the action of earthquake load, since the movable pier has no connection device, there will be a large relative displacement of the pier beam, and most of the se...

AI Technical Summary

Problems solved by technology

[0003] Under the action of earthquake load, since the movable pier has no connection device, there will be a large relative displacement of the pier beam, and most of the seismic force is borne by the fixed pier. Under rare earthquakes, the damage of the fixed pier is more serious, and there is no energy dissipation device. , there may also be a danger of falling beams, and additional anti-falling beam devices need to be installed. The design and construction of anti-falling beam devices in actual projects are relatively cumbersome

Images