Distributed fibre optic sensing: reinforcement yielding strains and crack detection in concrete slab during column failure simulation

The structural behaviour of the RC slab-column structure was controlled using advanced measurement techniques, including DFOS. Despite the extensive state of the art in distributed sensing, the paper provides the new knowledge gained during research. It is mainly related to extremely high (post-yield) strain measurements thanks to the excellent bonding properties and strain transfer to the optical fibre from both steel reinforcement and surrounding concrete.

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