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Title: Using the vibration envelope as a damage-sensitive feature in composite beam structures
Authors: Kasinos, Stavros
Palmeri, Alessandro
Lombardo, Mariateresa
Keywords: Composite bridges
Damage detection
Moving load problem
Non-destructive evaluation
Structural health monitoring
Issue Date: 2015
Publisher: Elsevier Ltd / © The Institution of Structural Engineers
Citation: KASINOS, S., PALMERI, A. and LOMBARDO, M., 2015. Using the vibration envelope as a damage-sensitive feature in composite beam structures. Structures, 1, pp. 67-75.
Abstract: A novel approach of damage detection in composite steel-concrete composite beams is suggested. Based on the idea of using the envelope's profile deflections and rotations induced by a moving load, this approach can lead to a practical cost-effective alternative to the traditional use of accelerometers and laser vibrometers.A parametric study has been undertaken, quantifying the sensitivity of the dynamic response of a realistic composite bridge to the presence of damage at different levels of partial steel-concrete interaction and velocity of the moving load.When compared to shifts in the natural frequencies, it has been verified that the proposed approach generally enjoys a higher sensitivity (so damage can be detected at an early stage), is more effective when closer to the ends of the bridge (where shear studs are more likely to be damaged), and displays an ordered set of results (which would reduce the possibility of a false damage).Further work is required to assess the effects of uncertainties and the adoption of more refined models for the moving load.
Description: This article was published in the journal Structures [Elsevier Ltd / © The Institution of Structural Engineers] and the definitive version is available at: http://dx.doi.org/10.1016/j.istruc.2014.10.001
Sponsor: The present research was conducted as part of the ENSURE scheme of Loughborough University, whose financial contribution is gratefully acknowledged.
Version: Accepted for publication
DOI: 10.1016/j.istruc.2014.10.001
URI: https://dspace.lboro.ac.uk/2134/17376
Publisher Link: http://dx.doi.org/10.1016/j.istruc.2014.10.001
Appears in Collections:Published Articles (Civil and Building Engineering)

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