Static and dynamic testing of bridges through microwave interferometry

A novel microwave sensor capable of remote detection of structural displacements is experimented as geotechnical instrument for static and dynamic testing of bridges. The sensor is based on an interferometric radar providing range imaging capability and sub-millimetric accuracy range displacement me...

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Bibliographic Details
Published in:NDT & E international : independent nondestructive testing and evaluation 2007-04, Vol.40 (3), p.208-214
Main Authors: Pieraccini, Massimiliano, Parrini, Filippo, Fratini, Matteo, Atzeni, Carlo, Spinelli, Paolo, Micheloni, Michelangelo
Format: Article
Language:English
Subjects:
Applied sciences
Buildings. Public works
Cross-disciplinary physics: materials science
rheology
Dynamic monitoring
Exact sciences and technology
Interferometry
Materials science
Materials testing
Measurements. Technique of testing
Physics
Radar
Remote sensing
Structural test
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Summary:A novel microwave sensor capable of remote detection of structural displacements is experimented as geotechnical instrument for static and dynamic testing of bridges. The sensor is based on an interferometric radar providing range imaging capability and sub-millimetric accuracy range displacement measurement. Dynamic monitoring calls for sampling rate high enough for transient analysis, while static monitoring requires long-term stability. The instrument has been designed in order to provide both these features. The results of a validation campaign on a railway bridge during the final test before going into service are reported.
ISSN:0963-8695
1879-1174
DOI:10.1016/j.ndteint.2006.10.007