Research Article
Apr 1979
Free Torsional Vibrations of Suspension Bridges
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VIEW THE REPLYPublication: Journal of the Structural Division
Volume 105, Issue 4
Abstract
A generalized theory of free torsional vibration for a wide class of suspension bridges with double lateral systems is developed, taking into account warping of the bridge deck cross section and the effect of torsional rigidity of the towers. The analysis is based on a linearized theory and on the use of the digital computer. A finite element approach is used to determine vibrational properties in torsion. Simplifying assumptions are made, and Hamilton's principle is used to derive the matrix equations of motion. The method is illustrated by numerical examples. The objective of the study is to clarify the torsional behavior of suspension bridges and to develop a method of determining a sufficient number of natural frequencies and mode shapes to enable an accurate practical analysis.
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Published In
Journal of the Structural Division
Volume 105 • Issue 4 • April 1979
Pages: 767 - 788
Copyright
© 1979 American Society of Civil Engineers.
History
Published in print: Apr 1979
Published online: Feb 1, 2021
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Ahmed M. Abdel-Ghaffar, AM.ASCE
Asst. Prof., Dept. of Materials Engrg., Univ. of Illinois at Chicago Circle, Chicago, Ill.; formerly, Research Fellow, Civ. Engrg. Dept., California Inst. of Tech., Pasadena, Calif.
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
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.
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.