Modal Identification and Damage Detection on a Concrete Highway Bridge by Frequency Domain Decomposition

Rune Brincker, Palle Andersen, Lingmi Zhang

    Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

    Abstract

    As a part of a research project co-founded by the European Community, a series of 15 damage tests were performed on a prestressed concrete highway bridge in Switzerland. The ambient response of the bridge was recorded for each damage case. A dense array of instruments allowed the identification of a modal model with a total of 408 degrees of freedom. Six modes were identified in the frequency range from 0 to 16.7 Hz. The objective of this paper is to demonstrate the effectiveness of the Frequency Domain Decomposition (FDD) technique for modal identification of large structures. A second objective is to show the application of the FDD method as an efficient way to perform health monitoring of civil engineering structures. The modal properties, frequencies, damping ratios and mode shapes for the different damage cases were compared with those for the undamaged bridge.

    Original languageEnglish
    Title of host publicationProceedings of the SEWC2002 Structural Engineers World Congress
    Number of pages8
    PublisherJapan Structural Consulting Association (JSCA)
    Publication date2007
    Publication statusPublished - 2007
    EventSEWC2002 Structural Engineers World Congress - Yokohama, Japan
    Duration: 9 Oct 200212 Oct 2002

    Conference

    ConferenceSEWC2002 Structural Engineers World Congress
    CountryJapan
    CityYokohama
    Period09/10/200212/10/2002

    Keywords

    • Damage tests
    • Frequency Domain Decomposition
    • Health monitoring of civil engineering structures

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  • Cite this

    Brincker, R., Andersen, P., & Zhang, L. (2007). Modal Identification and Damage Detection on a Concrete Highway Bridge by Frequency Domain Decomposition. In Proceedings of the SEWC2002 Structural Engineers World Congress Japan Structural Consulting Association (JSCA).