Evaluation of Vibration Damping of Glass-Reinforced-Polymer-Reinforced Glulam Composite Beams
Publication: Journal of Structural Engineering
Volume 131, Issue 7
Abstract
A systematic experimental investigation was conducted to evaluate the damping ratios of unreinforced glulam beams, and glulam beams reinforced with E-glass reinforced epoxy polymer (GRP) plates. The methods considered were the logarithmic decrement, the Hilbert transform, the moving block, and the half band power (HBP) methods. A modification to the HPB method is proposed to improve the method’s accuracy when considering materials with relatively high damping ratios. The influence of the lay up sequence, thickness, and through-the-depth location of the GRP plate on damping of the composite beams is also investigated. The results obtained from our experimental and numerical investigations show that the proposed modification to the HPB method could effectively improve the accuracy of the method when considering the vibration damping of composite materials possessing relatively high level of damping.
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Acknowledgments
The financial support granted to the second writer (F.T.) by the NSERC and CFI, which made this work possible, is greatly appreciated and acknowledged. The first writer (M.N.) also gratefully acknowledges the financial support of Mazandaran Univ. of Iran, as well as the Dept. of Civil Engineering at Dalhosuie Univ., for providing him the opportunity of spending his sabbatical leave in Canada. Acknowledgement also goes to Charles Mader for his assistance in setting up the experiments outlined in this paper.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 131 • Issue 7 • July 2005
Pages: 1044 - 1050
Copyright
© 2005 ASCE.
History
Received: Feb 6, 2003
Accepted: Apr 23, 2004
Published online: Jul 1, 2005
Published in print: Jul 2005
Notes
Note. Associate Editor: Barry Thomas Rosson
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