Distributed fiber optic systems – application to strain measurement of post-tensioned concrete structures - EDF
Article Dans Une Revue European Journal of Environmental and Civil Engineering Année : 2024

Distributed fiber optic systems – application to strain measurement of post-tensioned concrete structures

Résumé

This paper aims to showcase recent advances on Optical Fiber distributed strain measurement sys-tems applied to concrete monitoring. It focuses on their ability to accurately quantify concrete strain in post-tensioned containment buildings of nuclear power plants under various conditions, including instantaneous concrete strain due to pressure tests, delayed concrete strain due to creep/shrinkage, and instantaneous concrete strain due to tendon rupture. To achieve this, the study considers several mockups including the VeRCoRs building, a 1/3 scale prestressed concrete containment mockup equipped with a large number of monitoring systems. This mockup facilitates the testing and qualification of distributed measurement systems within con-crete structures during both operational phases (for prestressing monitoring) and pressure tests (for measuring instantaneous strain/displacement under pressure). Additionally, a post-tensioned beam was specifically designed and fabricated to examine tendon re-anchorage after cutting. Another objective is to assess various Optical Fiber Cables (OFC) from different suppliers to ensure reliable measurements. The study also aims to test different installation methods, such as embed-ding the OFC into concrete or attaching them to the external surface using various adhesives.
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Dates et versions

hal-04750027 , version 1 (23-10-2024)

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Mathieu Galan, Edouard Buchoud, Jean-Marie Henault, Frédéric Taillade, Karim Benzarti. Distributed fiber optic systems – application to strain measurement of post-tensioned concrete structures. European Journal of Environmental and Civil Engineering, 2024, pp.1-18. ⟨10.1080/19648189.2024.2389155⟩. ⟨hal-04750027⟩
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