Elastomeric Bearings
Elastomeric bearing can accomodate translation movements in any direction and rotational movements in any axis by elastic deformation. They should not be used in tension or when rotation is high and vertical load small. The basis of design is that the elastomer is an elastic material, the deflection of which under a compressive load is influenced by its shape (shape factor). Reinforcing plates should be bonded to the elastomer to prevent any relative movement at the steel/elastomer interface. The dimension and the number of internal layers of elastomer chosen shall satisfy the following clauses of IRC: 83(Part-II).
Design Criterion Clause no of IRC: 83 (Part-II)
Dimensional 916.3.3
Translational 916.3.4
Rotational 916.3.5
Frictional 916.3.6
IRC: 83 (Part-II) recommends that chloroprene (CR) only shall be used in the manufacture of elastomeric bearing. The elastomer shall conform to all the properties specified in table 1 of IRC: 83 (Part-II), and tolerances in dimensions specified in table2 of IRC: 83 (Part-II).
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