Products  〃〃  Friction Damping Seismic Bearing(FDS)
1. Principle.
  Datong FDS Friction Damping Seismic Bearings are seismic protection devices, which can reduce and limit the energy transferred
from the ground to the superstructures, especially in the events of earthquake. Rotation and friction as the horizontal movement of the
superstructure can also absorb the energy in earthquake and reduce the period of vibration, avoid destroying the structure by resonance.
2. Structure.
3. Application.
  Due to its simplicity and economy, FDS bearings are widely applied in many kinds of bridges, sky-scraping buildings and steel
structural constructions, especially in earthquake-prone areas. FDS bearings can work as normal elastomeric bearings in regular days.
Once earthquake comes, they will move and rotate to absorb and dissipate energy of the earthquake.
4. Standards.
  FDS bearings are manufactured and designed in accordance with ^GB/T 17955-2000、JT/T391-2009、EN1337 2004、
BS5400 or AASHTO LRFD bridge construction specifications ̄.
5. Types.

6. Raw Materials.

  Reinforcing plates, the top and bottom plates are made from steel grade Q235 or Q345 in accordance with ^AASHTO LRFD

bridge design specifications ̄ or CE1337 standard.

  Elastomeric materials are made from natural rubber, type ^NR ̄, grade3 as ASTM d4014-81.

7. Corrosion prevention.

  FDS bearings execute corrosion prevention systems according to EN ISO 12944. Specific corrosion work depends on its location,
environment, and the need of customers.
8. Handling, Storage, Installation and Maintenance.
  See the Handling, Storage, Installation and Maintenance chapter of bearings.
9. Inquiry.
  Quotations are welcomed with the following information:
  the vertical loads, including the maximum, permanent and the minimum, and the corresponding horizontal loads.
  maximum horizontal loads in the longitudinal and the transverse direction, and the related vertical loads.

  rotations in the longitudinal and transverse directions.

  the corresponding working drawing.
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