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A tuned liquid damper works on the same principle as a tuned mass damper, using

  • A.the freezing and thawing of water within a sealed vessel
  • B.the sloshing of water in a tank tuned to the structure's frequency
  • C.the weight of a water tank acting as a rigid added mass
  • D.the pressure of water forced through a calibrated orifice in a pipe

Answer: B

Correct answer: the sloshing of water in a tank tuned to the structure's frequency

The sloshing mass of water moves out of phase with the building and absorbs energy in the same way as the mass of a tuned mass damper, with the tank dimensions and water depth setting the sloshing frequency. Its appeal is that the water can serve a second purpose - fire reserve, for example - and that there is nothing mechanical to maintain.

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