Wind-Induced Response Characteristics of Monolayer Cable Net
Publication: Journal of Engineering Mechanics
Volume 136, Issue 3
Abstract
Monolayer cable net system supporting glass facades is structurally sensitive to wind excitations. At present, there are limited researches on its wind-induced vibration performance, therefore it appears imperative to understand the wind-resistant behavior of this type of cable net. The wind-induced response of the monolayer cable net subjected to fluctuating wind loads is investigated with frequency-domain method in this paper, when the cable net deforms to the balance position under the mean wind loads. Some critical factors to wind-induced response are highlighted, including participation property of the modes in the dynamic vibration, and coupling effect among modes. The response spectrum of the cable net is also intensively investigated. It is shown that the first mode dominates wind-induced response significantly in all the modes, and the modes contributing to the wind-induced responses prominently are distributed in a narrow band of low order modes. When some lower modes and coupling effects among these modes are considered, the results in frequency domain agree well with the corresponding results obtained from time domain method, which are adequate for engineering practice. The characteristics of response spectrum of the nodal displacements are similar to those of the cable forces. When the wind loads and structural parameters vary in practical ranges in engineering, the resonant component in the total response sometimes occupies larger part in the total fluctuating wind response of the cable net, while the background component dominates in the wind response more commonly. Nevertheless, the first mode makes the largest contributions, no matter the background or the resonant component dominates.
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Acknowledgments
The Specialized Research Fund for the Doctoral Program of Higher Education (Grant No. UNSPECIFIED20050003080) and KGE Research Fund (Grant No. UNSPECIFIED200303) is gratefully acknowledged for financial support of the work described in this paper including the corresponding software.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 136 • Issue 3 • March 2010
Pages: 311 - 321
Copyright
© 2010 ASCE.
History
Received: Dec 29, 2007
Accepted: Oct 28, 2009
Published online: Feb 12, 2010
Published in print: Mar 2010
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