Eliminating Beating Effects in Damping Estimation of High-Rise Buildings
Publication: Journal of Engineering Mechanics
Volume 145, Issue 12
Abstract
The beating phenomenon, induced by coupling between translational modes of tall buildings with closely spaced frequencies, may have significant effects on modal identification, especially damping estimation. This paper proposes a new method for attenuating the adverse effects of beating on modal identification for high-rise buildings. Beating in typhoon-induced responses of a high-rise building is clearly observed via both frequency domain and time domain analysis. To eliminate the effects of beating on structural modal identification, a normal coordinates–based modal decomposition method for coupled translational modes is proposed, which is proved to be effective for separating closely coupled translational modes and thereby improving the accuracy of damping estimation for high-rise buildings. This paper aims to provide valuable implications for damping evaluation of high-rise buildings.
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Acknowledgments
The work described in this paper was fully supported by a grant from the Research Grants Council of Hong Kong Special Administrative Region, China (Project No. CityU 11256416) and a grant from the National Natural Science Foundation of China (Project No. 51778554).
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Published In
Journal of Engineering Mechanics
Volume 145 • Issue 12 • December 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Oct 2, 2018
Accepted: Apr 10, 2019
Published online: Sep 28, 2019
Published in print: Dec 1, 2019
Discussion open until: Feb 28, 2020
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