Abstract
Among the most popular techniques for repairing and retrofitting masonry structures are those based on carbon fiber reinforced polymers (CFRP), textile reinforced mortar (TRM) and mortar reinforced with electro-welded wire mesh (WWM). These techniques have demonstrated to perform well in laboratory experiments and in real seismic events. However, up to date, there is no experimental field technique able to assess the effectiveness of this intervention in a non-destructive manner. In this study, four full scale unreinforced masonry walls were constructed in laboratory and retrofitted using CFRP, TRM and WWM methods. The walls were tested under a quasi-static cyclic load pattern and their modal properties were identified at different levels of load and damage by applying low intensity impact.
The results reveal variations in the modal frequencies of all the walls. However, these variations were only significant when the reinforcements distributed on the entire face of the panel. When damage was affecting the support conditions, it can be only identified when it was originally generated and not its progression.
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Acknowledgement
This research was supported by ANID/CONICYT through FONDECYT Iniciación 11200117 and by Dirección de Investigación UCSC through DI-FME 05/2021. In addition, there was the support of Sika Chile, Ubique Ltd and Kerakoll by the donation of the material used for the reinforcement of the tested walls. Also, we appreciate the contribution of D. Ortiz, L. Lobos, D. Nova and J. Hermosilla during the experimental work.
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Oyarzo-Vera, C., Romero-Carrasco, J. (2023). Variation of the Dynamic Response of Retrofitted Masonry Walls at Different Stages of Damage. In: Limongelli, M.P., Giordano, P.F., Quqa, S., Gentile, C., Cigada, A. (eds) Experimental Vibration Analysis for Civil Engineering Structures. EVACES 2023. Lecture Notes in Civil Engineering, vol 432. Springer, Cham. https://doi.org/10.1007/978-3-031-39109-5_70
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DOI: https://doi.org/10.1007/978-3-031-39109-5_70
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