Description:
Neoprene Bearing Pads are molded or cut
from a molded sheet of high-grade, new neoprene synthetic
rubber compounds.
Use: As economical
efficient bering plates for pre-cast, pre-stressed concrete or
steel beams in bridges and buildings. Neoprene Pads permit a
smooth and uniform transfer of load from the beam to the
substructure and allow beam rotation at the bearing due to
deflection of the beam under load. They further allow lateral
and longitudinal movement of the beam caused by thermal forces.
Neoprene Pads have no movable parts and thermal expansion and
contraction are absorbed by the pad's ability to give and take
in shear. There is no sliding motion between pad and beam or
between pad and abutment.
NEOPRENE IN COMPRESSION
Compressive
Stress/Strain of Steel-Reinforced Neoprene Bearings.
Materials: The material
specification for the elastomeric bearing shall meet the
requiremnts of the current AASHTO M 251 (Standard
specifications for laminated elastomeric bridge bearings) as
listed under subsections "Materials" and "Test".
Fabrication:
Elastomeric bearings shall be composed of multiple laminates
of elastomeric material separated by steel reinforcing.
Bearings have steel plates as the reinforcement shall be cast
as a unit in a mold under pressure and heat and the steel
plates separating the elastomeric layers shall be completely
bonded by vulcanization to the elastomeric material on all
surfaces. An external load bearing steel plate(s) shall be
factory vulcanized to the elastomeric bearings during the
primary molding process.
