Function separation-type combination seismic isolation bearing containing steel block structure and construction method thereof

Abstract

The invention provides a function separation-type combination seismic isolation bearing containing a steel block structure and a construction method thereof. The seismic isolation bearing comprises a bearing upper steel plate, sealed rubber rotation parts, ordinary rubber bearing parts, a bearing lower steel plate and a side face steel baffle plate; the rotational deformation function of the seismic isolation bearing is independently borne by the sealed rubber rotation parts, and part of the seismic energy is consumed by relying on the rotational deformation; the horizontal shear deformation function of the seismic isolation bearing is independently borne by the ordinary rubber bearing parts, and part of the seismic energy is consumed by relying on shear deformation. The rotational deformation function of the bearing is separated from the horizontal shear deformation function of the bearing by the function separation-type combination seismic isolation bearing, so that the bearing meets the requirements of the inherent cycle and buckling stability in the seismic isolation design; in addition, the side face steel baffle plates are mounted on two sides of the cross bridge by each seismic isolation bearing, in comparison with ordinary reinforced concrete blocks, the crash locations are dispersed, the collision force is smaller, the damage to the bearings themselves can be reduced, and falling beams and earthquake damage can also be prevented.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering and construction, and relates to a bridge composite shock-isolation bearing device and a construction method thereof. Background technique [0002] my country is one of the earthquake-prone countries in the world. Except for a few provinces, earthquakes have occurred in other provinces. The destructive effect of the earthquake has caused great damage to the bridges in our country. During an earthquake, isolation bearings can effectively reduce bridge damage, and ordinary rubber bearings are widely used in bridge isolation. [0003] Generally speaking, ordinary rubber bearings need to meet the following functions: 1. Vertical support function; 2. Horizontal shear deformation function; 3. Rotation deformation function. In order to achieve the above functions, the shape of the support and the arrangement of the laminated structure are subject to certain restrictions. On the one hand, in...

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Problems solved by technology

But on the other hand, thicker rubber bearings are prone to instability and damage when subjected to vertical loads.

It is difficult to satisfy both

[0004] In addition, during the earthquake, the girder body will have a large displacement in the direction of the bridge or along the bridge, and in severe cases, beam falling damage in the direction of the bridge or along the bridge may occur

In order to prevent the damage of the beam falling in the direction of the transverse bridge, reinforced concrete stoppers are often installed on both sides of the transverse bridge direction at the top of the bridge pier cover girder in our country, and the collision between the reinforced concrete stopper and the beam body is used to limit the relatively large cross-bridge direction of the beam body. Displacement, but the number of ordinary reinforced concrete stoppers is small, and the collision positions are concentrated. In earthquakes, damage often occurs due to excessive collision force and horizontal shear force, which causes the beam damage of the transverse bridge; similarly, the larger The large collision force may damage the limit device of the bridge along the bridge direction, causing earthquake damage to the beam falling along the bridge direction

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