Periodic Assembly of Steel Truss Systems for Efficient Analyses and Early Detection of Localized Damage Using Impulse Response Method
Publication: Journal of Structural Engineering
Volume 144, Issue 5
Abstract
In this paper, the design of truss systems configured with a periodic pattern is proposed for obtaining the frequency response of truss units by the recursive finite-element method and monitoring their variations with localized damage using the impulse response method. The periodic assembly of a truss allows modeling with the unit cell approach in order to obtain local vibration modes independent from boundary conditions and applying recursive finite-element models that significantly reduce the required degrees of freedoms for dynamic analyses. Once the local vibration modes are obtained using dispersion curves, the impulse response method is used for tracking the damage location on the truss geometry. The approach is numerically demonstrated using three different periodic topologies and experimentally verified using a selected truss topology. The integration of the structural design and damage detection method at their earliest stage provides a forward solution for structural design and diagnosis.
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Acknowledgments
This investigation was supported by National Science Foundation Award No. 1552375 entitled “CAREER: Engineered Spatially Periodic Structure Design Integrated with Damage Detection Philosophy.” The support from the sponsor is gratefully acknowledged. Any opinions, findings, and conclusions or recommendations expressed in this paper are those of the authors and do not necessarily reflect the views of the organization acknowledged above.
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Published In
Journal of Structural Engineering
Volume 144 • Issue 5 • May 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Apr 12, 2017
Accepted: Oct 23, 2017
Published online: Mar 8, 2018
Published in print: May 1, 2018
Discussion open until: Aug 8, 2018
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