High damping rubber bearing (HDR)

High damping rubber bearing，also known as HDR bearing pad, is a kind of
seismic isolation bearingsimilar with lead rubber bearing.Made from special
rubber with excellent damping attribute and layers of steel, the high
damping rubber bearing has excellent flexibility,vibration reduction ability
and high restoring ability. Thus it is an important component of seismic
isolation system and can effectively reduce the bridge and building
structure damage caused by earthquake.The high damping rubber bearing itself
performs the isolation function and does not need to configure other
devices, so the maintenance and management cost is low.
Working principle of high damping rubber bearing
By producing large deformation and small rigidity, the high damping rubber
bearing has excellent seismic effect during the earthquake.As the elastic
stiffness of the bearing depends on its deformation degree. When the
deformation is small, the stiffness will be large. The high damping rubber
bearing has excellent seismic isolation function by this principle.
Characteristics of high damping rubber bearing
The hysteretic characteristic (load deformation curve) of high damping
rubber bearing is full, which can play an isolation effect for wind
vibration and large, medium and small earthquakes.
The high damping rubber bearing itself performs the isolation function and
does not need to configure other devices, so the maintenance and management
cost is low.
After a large earthquake, the high damping rubber bearing will not produce
residual deformation, and the characteristic change is very small, so it
does not need to be replaced.
The elastic properties and damping properties of high damping rubber
bearings have little dependence on temperature, that is, they are less
affected by temperature, so they are suitable for a wide range of fields.
The internal EPDM rubber is completely protected which is resistant to the
ozone and ultraviolet, so it has better aging-resistant ability.
HDR high damping rubber has the same superior creep performance as natural
rubber.
Applications
High damping rubber bearing is widely applied in the quake-prone areas for
bridge, building and other construction structures.

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