Effectiveness of Tuned Mass Dampers against Ground Motion Pulses
Publication: Journal of Structural Engineering
Volume 139, Issue 2
Abstract
It is known that the effectiveness of tuned mass dampers (TMDs) decreases as the input duration shortens. As a result, their use is commonly discouraged against short-duration, pulse-like ground motions, such as those occurring in near-field (NF) zones in the presence of forward directivity or fling-step effects. Yet a systematic assessment of such control impairment is still missing. In this paper, a recent analytical model of ground motion pulses is applied to the design and evaluation of TMDs against impulsive earthquakes. Based on this model, first, a new optimization method is introduced as an alternative to the classical approach. Then, the two strategies are tested on single- and multi- degrees-of-freedom linear structures subject both to analytical pulses and to a large set of NF records possessing pulse-like features. The resulting statistical evaluation, expressed by percentile response spectra, shows the pros and cons of a pulse-oriented TMD design and improves the general understanding of TMD performance under impulsive ground motions.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 139 • Issue 2 • February 2013
Pages: 188 - 198
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Jul 27, 2010
Accepted: Apr 24, 2012
Published online: Apr 26, 2012
Published in print: Feb 1, 2013
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