Research Article
Apr 1981
Tortional Vibration of Along-Wind Excited Structures
Authors: D.A. Foutch, AM.ASCE, and E. SafakAuthor Affiliations
Publication: Journal of the Engineering Mechanics Division
Volume 107, Issue 2
Abstract
A method for analyzing the torsional vibration of along-wind excited structures is presented. The method is based on random vibration concepts and yields the expected maximum translational and torsional responses of a single-mass structure. The approach is similar to the gust factor method. Aerodynamic admittance functions are derived which are used to estimate the spectral density function of the random torque and the cross-spectral density function of the force and torque acting on the structure. These are required for estimating the structure's translational and torsional mean square responses. Results for several examples indicate that the dynamic torsional response increases as follows: as the width of the structure's exposed face increases, as the structural or geometric eccentricity increases, and as torsional natural frequency decreases.
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Published In
Journal of the Engineering Mechanics Division
Volume 107 • Issue 2 • April 1981
Pages: 323 - 337
Copyright
© 1981 American Society of Civil Engineers.
History
Published in print: Apr 1981
Published online: Feb 3, 2021
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Affiliations
D.A. Foutch, AM.ASCE
Asst. Prof. of Civ. Engrg.; Univ. of Illinois at Urbana-Champaign, Urbana, Ill. 61801
E. Safak
Grad. Research Asst.; Dept. of Civ. Engrg., Univ. of Illinois at Urbana-Champaign, Urbana, Ill. 61801
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.