Probabilistic damage detection in beam structures based on the neutral axis

D. H. Sigurdardottir, Branko Glisic

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The centroid of stiffness is a universal parameter and its position in a cross-section can be evaluated for any load-carrying beam structure as the position of the neutral axis under conveniently chosen loads. Thus, a change in the position of the neutral axis within a cross-section can indicate change in the position of the centroid of stiffness, i.e., unusual structural behaviors. This study presents a probabilistic damage detection method based on changes in the position of the neutral axis. Therefore, the method presented in this paper is potentially applicable to a large variety of beam-like structures. Dynamic strain data from the US202/NJ23 highway overpass in Wayne, NJ, is used to assess and validate its performance. The results show that the neutral axis location is varying even when damage is not present. Reasons to this variation are proposed and the accuracy in the evaluation assessed. The conclusion of this study is that the position of the neutral axis can be evaluated with sufficient accuracy using dynamic strain measurements and presents its potential to be used as a damage sensitive feature.

Original languageEnglish (US)
Title of host publicationStructural Health Monitoring 2013
Subtitle of host publicationA Roadmap to Intelligent Structures - Proceedings of the 9th International Workshop on Structural Health Monitoring, IWSHM 2013
PublisherDEStech Publications
Pages2678-2685
Number of pages8
Volume2
ISBN (Electronic)9781605951157
StatePublished - Jan 1 2013
Event9th International Workshop on Structural Health Monitoring: A Roadmap to Intelligent Structures, IWSHM 2013 - Stanford, United States
Duration: Sep 10 2013Sep 12 2013

Other

Other9th International Workshop on Structural Health Monitoring: A Roadmap to Intelligent Structures, IWSHM 2013
CountryUnited States
CityStanford
Period9/10/139/12/13

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Health Information Management

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  • Cite this

    Sigurdardottir, D. H., & Glisic, B. (2013). Probabilistic damage detection in beam structures based on the neutral axis. In Structural Health Monitoring 2013: A Roadmap to Intelligent Structures - Proceedings of the 9th International Workshop on Structural Health Monitoring, IWSHM 2013 (Vol. 2, pp. 2678-2685). DEStech Publications.