Rubber Bearing Seismic Isolation Base

Prodution Description

OVICTOR rubber bearing is composed of alternating laminations rubber layers and vulcanized steel plates (shims), bonded together to provide vertical rigidity and horizontal elasticity.

The vertical stiffness ensures that the isolator will support the weight of the structure, while the horizontal flexibility translates the destructive horizontal vibration into a gentle motion.

Since the steel plates are completely embedded in the elastic material, they are sealed and thus prevent corrosion. The devices are manufactured with rubber vulcanized to the top and bottom connection plates. The bearings can also be supplied with additional anchor plates, allowing easier replacement of device in case of maintenance needs.

Design principle

The working principle of OVICTOR high damping rubber bearing is the isolation of the base and the transfer of energy from the ground to the structure during an earthquake. Rubber and steel laminate supports are designed to support the weight of the structure and provide flexibility after yielding. After the earthquake, the rubber provides isolation and re-centring of the bearings, while reaching higher damping of up to 16%.

Application

High Damping Vibration Isolation Rubber Bearing Pads, also known as block bearings or rubber pads, are especially suitable for small and medium loading.

Different plane shapes are suitable for different span structures: orthogonal bridge applies to rectangular bearings; curved bridge, skew bridge and cylinder pier bridge applies to circular bearings.

Elastomeric bearings shall be designed and manufactured to accommodate translational movements in any direction and rotational movements about any axis by elastic deformation, in order to transmit in a correct manner, from one structural component to another, the design forces and accommodate the design movements derived from the structural analysis.

They can be combined with complementary bearing devices to extend their field of use, such as a sliding system, either temporary or permanent, or a constraining system in any direction.

Elastomeric bearings shall function correctly when they are subject to normal environmental conditions and maintenance, during an economically reasonable designed working life. Where exceptional environmental and application conditions are encountered additional precautions shall be taken (see EN 1337-9). The conditions shall then be precisely defined.

Although elastomeric bearings are designed to accommodate shear movements, they shall not be used to provide permanent resistance to a constantly applied external shear force.

Elastomer rubber bearing pad technical parameter