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Digital image correlation for structural measurements.

McCormick, N; Lord, J D (2012) Digital image correlation for structural measurements. Proc. Inst. Civil Eng. - Civil Eng., 165 (4). pp. 185-190.

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Digital image correlation (DIC) is an optical imaging technique that compares images taken of a structure and is well established for laboratory measurements. By processing pairs of images under different loading conditions then the full field deformation of the structure can be measured, using modern high-resolution digital cameras in-plane displacement resolutions can approach 5 ppm of the horizontal field of view. The technique is attractive as it uses familiar photographic practices and little specialized setup or preparation is generally required to produce unambiguous results.

This measurement performance combined with the ready availability of low-cost computing resource means that DIC is now useful for full field deformation measurements of civil engineering structures and can help identify suitable sites for installation of continuous measurement deformation sensors. Examples of its use in this area will be described and the some of the practical problems of deploying the technique in-situ will be discussed.

Item Type: Article
Keywords: Field testing & monitoring, Bridges
Subjects: Advanced Materials
Advanced Materials > Structural Health Monitoring
Identification number/DOI: 10.1680/cien.11.00040
Last Modified: 02 Feb 2018 13:14
URI: http://eprintspublications.npl.co.uk/id/eprint/5649

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