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Tuned Mass Damper

What are?

Tuned mass dampers or TMD are devices applied to particularly flexible structures such as tall buildings or walkways to mitigate vibrations due to earthquakes, wind or other dynamic actions.

The TMD is achieved by connecting to the main mass an additional mass by means of a system of elastic springs and viscous dampers.

On the buildings the TMD can be easily realized (as well as with the insertion of an additional mass), using as mass that of the last floors of the building itself (or other structural mass) inserting a system of elastic devices + heatsinks. The TMD in this case is similar to a SEISMIC PROTECTIONinserted not at the base but at a higher level.

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