The use of vibrating strain gages is rather common to monitor the deformation of large dams, nuclear containments, bridges, tunnels and so on. These gages are embedded in concrete structure and are known to have a good performance in terms of accuracy and lifetime. I have found an article in French (http://www.barrages-cfbr.eu/IMG/pdf/col2012-2-06-auscultation_par_capteurs_a_corde_vibrante-rex.pdf) dealing with West European practice. Is there any other industrial feedback available, from other parts of the world for instance?