What is elastomeric bearing system?

Elastomeric bearings are steel plate laminated rubber bearings installed between the hull of a vessel and its modules. They are used to accommodate axial, shear and rotational movement so they keep a vessel’s modules safe from impact, damage and deformation arising from adverse sea and weather conditions.

What are the types of elastomeric bearing?

The term encompasses several different types of bearings including bearing pads, bridge bearings, laminated elastomeric bearings, and seismic isolators which are all generally referred to as “bridge bearing pads” in the construction industry.

Why steel plates are used in elastomeric bearings?

Steel plates have the special property that it doesn’t affect the shear stiffness of Elasticmetric bearings. For increasing compression stiffness of elastomeric bearing by limiting the amount of lateral bulging. To function the bearing as a soft Spring in elastomeric bearing.

What is elastomeric bearing strip?

Generically referred to as an “un reinforced” Bearing Pad or Bearing Strip, they are pressure moulded from a high quality Natural Rubber of 60 IRHD hardness. NATA Certification, or equivalent, on Hardness, Tensile Strength, Compression Set and Ozone resistance is available.

What are elastomers?

elastomer, any rubbery material composed of long chainlike molecules, or polymers, that are capable of recovering their original shape after being stretched to great extents—hence the name elastomer, from “elastic polymer.” Under normal conditions the long molecules making up an elastomeric material are irregularly …

How do you determine the size of an elastomeric bearing?

The design of elastomeric bearings is based on striking a balance between the provision of sufficient stiffness to resist high compressive force and the flexibility to allow for translation and rotation movement. The cross sectional area is normally determined by the allowable pressure on the bearing support.

What are the types of expansion bearing?

Different types of bearings for bridges include:

• Sliding bearings.
• Rocker and pin bearings.
• Roller bearings.
• Elastomeric bearings.
• Curved bearings.
• Pot bearings.
• Disk bearings.

Is PE an elastomer?

A new kind of dynamic thermoplastic elastomers based on chlorosulfonated polyethylene and lowdensity polyethylene, which combine the advantages of composites of polyolefin with nitrile rubber and of polyolefin with ethylene-propylene rubber and are free of their drawbacks, was developed.

How do elastomers work?

Elastomer: Polymer that displays rubber-like elasticity. Rubber-like solids with elastic properties are called elastomers. Polymer chains are held together in these materials by relatively weak intermolecular bonds, which permit the polymers to stretch in response to macroscopic stresses.

How do you model an elastomeric bearing in sap2000?

You can model the bearing by drawing a Two Joint Link aligned vertically, in such a way that one end is connected to the bridge deck and the other end is fixed. You may assign Fixed restraint to the bottom end of the link to represent the fixed condition.

What is shear rating of elastomeric bearing?

Commonly used elastomers have a shear modulus between 0.080 and 0.175 ksi and a nominal hardness between 50 and 60 on the Shore A scale. The shear modulus of the elastomer at 73° F is used as the basis for design.

What is an expansion bearing?

The expansion (EX) bearing has a plain outer race roller track. This bearing takes radial load only. The inner race is clamped to the shaft, and moves axially with it when expansion or contraction occurs.