Research Article
Jan 1977
Damping Characteristics of Composite Girder
Authors: Roger C. Duffield, Harold J. Salane, M.ASCE, Allen R. Olsen, AM.ASCE, and Robert R. WellsAuthor Affiliations
Publication: Journal of the Structural Division
Volume 103, Issue 1
Abstract
An experimental laboratory program was conducted to determine the damping characteristics of a composite girder at different strain levels and the effect of structural deterioration due to cyclic loading on these characteristics. The cyclic loading was imposed by means of a moving-mass closed-loop electrohydraulic actuator system. Five different methods were employed in the investigation to evaluate the equivalent linear viscous damping of the composite girder. The results show that strain level and structural deterioration have a considerable effect on the damping ratio. Initially, the damping ratio increased as the strain level increased. However, after the composite girder had incurred some structural deterioration, the damping ratio decreased as the strain level increased. All five of the different methods used to determine the damping ratio yield approximately the same value for the damping ratio and predict the same trends with regard to the strain level.
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Published In
Journal of the Structural Division
Volume 103 • Issue 1 • January 1977
Pages: 105 - 118
Copyright
© 1977 American Society of Civil Engineers.
History
Published in print: Jan 1977
Published online: Feb 1, 2021
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Authors
Affiliations
Roger C. Duffield
Assoc. Prof. of Mech. and Aerospace Engrg., Univ. of Missouri-Columbia, Columbia, Mo.
Harold J. Salane, M.ASCE
Prof. of Civ. Engrg., Univ. of Missouri-Columbia, Columbia, Mo.
Allen R. Olsen, AM.ASCE
Lieutenant; U.S. Army Corps of Engrs., Clearfield, Utah; formerly, Grad. Student, Univ. of Missouri-Columbia, Columbia, Mo.
Robert R. Wells
Development Engr., Western Electric, Winston-Salem, N.C.; formerly, Grad. Student, Univ. of Missouri-Columbia, Columbia, Mo.
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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.