PSI - Issue 64

Alex Carpenter et al. / Procedia Structural Integrity 64 (2024) 319–326 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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As noted in Section 2, FBGs are beneficial in long-term monitoring of historic structures due to their versatility, multiplexing capability, and small size, enabling minimally intrusive installation and operation. Based on data from Phases 1 and 2, strain and temperature FBGs will be added to structural components of the site in Phase 3 to assess conservation efforts, including mortar repointing, set to take place in 2025 and determine if their versatility and multiplexing capabilities are worth the high costs of interrogators. 4. Conclusion This article provides a review of previous SHM systems in 45 historic places of faith, briefly covering the limitations and benefits of sensors used in these case studies. Drawing from the information and insights obtained through this review, a phased strategy was devised for gradual sensor implementation in the Cathedral of the Immaculate Conception, NB. This plan considers a limited budget and structural concerns that necessitate intervention. It consists of 3 phases: emergency monitoring of areas at risk of structural collapse, monitoring areas at a lower risk that necessitate future conservation efforts while introducing environmental monitoring, and the continuation of sensor implementation for long-term monitoring based on data from previous phases. Following intermittent data analysis, the contribution of each sensor will be assessed and the SHM system will be updated to include only sensors sufficiently contribution to the state of knowledge. A suitable selection of sensors will remain for long-term monitoring after Phase 2. Acknowledgements We would like to thank Sonya Burrill and the team at Heritage Standing for their expertise and guidance. We extend our appreciation to the Fibre Photonics group at National Research Council Canada for their invaluable support and guidance on FBG sensors. 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