Access the full text.
Sign up today, get DeepDyve free for 14 days.
Loading next page...
/lp/ios-press/estimation-of-transitory-changes-in-bending-stiffness-using-the-Yd708oT81Z
- Publisher
- IOS Press
- Copyright
- Copyright © 2019 © 2019 – IOS Press and the authors. All rights reserved
- ISSN
- 1573-2487
- eISSN
- 1744-8999
- DOI
- 10.3233/BRS-190163
- Publisher site
- See Article on Publisher Site
Abstract
A finite element model of a bridge can be calibrated based on field measurements, and then updated periodically using a structural health monitoring system. The value of a structural parameter such as bending stiffness can be adjusted to measurements using well-known modal updating techniques and monitored in conjunction with external effects such as temperature to assess the condition of the structure. A value of the parameter that is predominant during the period under investigation will be captured, however, in the case of bending stiffness, brief and transitory values could take place as a result of a section exceeding the yield point due to a moving traffic load. Given that the latter is probably the prelude of more severe damage, this paper proposes a novel two-stage method based on the Hilbert-Huang transform combined with a statistical optimization approach to characterize the stiffness changes associated with a non-linear response.
Journal
Bridge Structures – IOS Press
Published: Dec 31, 2019