A bridge bearing is a product widely used in bridge construction to provide excellent absorption and transfer of external forces from the superstructure to the foundations. Meanwhile, it allows for stable rotations in any axis and horizontal sliding movements to reduce the forces upon bridges and buildings. Bridge bearings are not only used in bridge construction, but also can be applied to highways, roads, docks, airports, buildings and other applications where large and heavy objects need to operate safely.
Different bridge bearings have different appearances, but all of them are in small size, which means they are smaller than bridge deck sometimes even the piers they sit on. Taking advantages of the small size, all forces converge on a small point and to be transferred to the foundation through a very compact line. In this way, it effectively decreases the shearing force and provide higher security during the transference.
There are ten main types of bridges bearings are supplied to meet your different needs. Some specific designs are also available as your request.
Laminated elastomeric bearings with reinforced steel plates have higher longitudinal and compression strength and allow for rotations in any axis.
PTFE top elastomeric bearings utilize sliding surface and lubricant to reduce sliding resistance and it is suitable for bridges with large spans, etc.
Lead rubber bearings feature central lead plug, are widest used for building or bridges to proof earthquake and avoid deformation and damage to the building.
High damping rubber bearing, made of quality rubber with damping ability and laminated layers of steel, is used as a seismic isolator of building or bridges.
In summary, the traditional water stop has been unable to meet the specific requirements of tunnels. It is necessary to develop a new type of water stop structure specialized for the near sea tunnel.
The construction quality of isolation layer is the key point and difficulty of the quality control of seismic isolation building.
This paper firstly expounds the development of isolation theory and then carries out the finite element analysis of the isolated structure and non - isolation structure.
In this study, the application of seismic isolation not only improves seismic performance, but ensures that the overall structure of bridge in the serious disasters is still good.