Research Article
Jan 1981
Wind-Induced Lock-In Excitation of Tall Structures
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VIEW THE REPLYAuthors: Kenny C.S. Kwok and William H. MelbourneAuthor Affiliations
Publication: Journal of the Structural Division
Volume 107, Issue 1
Abstract
Circular and square tower models were tested in a boundary layer wind tunnel. At close to the critical reduced velocity and particularly at low values of structural damping, displacement dependent lock-in excitation was found to cause large increases in cross-wind displacement response, especially for the circular tower, in a suburban type wind model. Critical cross-wind response amplitudes were determined from the response characteristics. These response amplitudes represent the level of cross-wind response of a structure above which the response can not be accounted for by the random wake excitation process and that lock-in excitation is significant. A prediction procedure, which consists of a random excitation model and a sinusoidal lock-in excitation model, is described. Cross-wind response predicted by these models agreed well with the measured response.
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Published In
Journal of the Structural Division
Volume 107 • Issue 1 • January 1981
Pages: 57 - 72
Copyright
© 1981 American Society of Civil Engineers.
History
Published in print: Jan 1981
Published online: Feb 1, 2021
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Kenny C.S. Kwok
Lect., School of Civ. Engrg., Univ. of Sidney, New South Wales, Sidney 2006, Australia
William H. Melbourne
Prof. of Fluid Mech., Dept. of Mech. Engrg., Monash Univ., Victoria, Australia
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