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A friction damper dissipates energy through

  • A.the flow of a viscous fluid through a narrow orifice
  • B.the purely elastic deformation of a steel plate housed within the device
  • C.the yielding of a lead core at the centre of the device
  • D.slip between clamped surfaces once a threshold force is exceeded

Answer: D

Below the threshold the device is rigid and the structure behaves normally, and above it the connection slips at a constant force. The behaviour is displacement-dependent, so the damper force peaks at the same instant as the elastic force in the frame.

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