ENERGY DISSIPATION OF TUNED MASS DAMPERS DURING EARTHQUAKE EXCITATIONS

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ENERGY DISSIPATION OF TUNED MASS DAMPERS DURING EARTHQUAKE EXCITATIONS

Author: K. K. F. WONG and Y. L. CHEE | Size: 504 KB | Format: PDF | Quality: Original preprint | Publisher: K. K. F. WONG and Y. L. CHEE | Year: 2003 | pages: 17

The effectiveness of energy-dissipative tuned mass dampers (TMD) on structural dynamic responses have been
studied extensively since its development in the 1970s. Its applications have recently been extended to the use
of active multiple tuned mass dampers. However, the process of a damper in improving a structure’s ability to
dissipate the earthquake’s input energy has never been investigated. In this research, the objective lies in studying
the process of structural energy transfer and the ability for the structure to dissipate energy. Numerical
simulations are performed to study the energy responses of structures with and without TMD installed. The effectiveness
of TMD in reduction of energy responses is also studied by using energy spectra and in a case study of
a six-storey building. Results show that TMD is more effective in reducing the energy responses for structures
with a moderate to long period of vibration than those for short period structures. In addition, TMD is very effective
in reducing both the maximum kinetic energy and strain energy of the structure, while it is also effective in
reducing the amount of damping energy that must be dissipated through the structure by providing an alternating
route of damping energy dissipation through the TMD

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