PSI - Issue 44

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Marianna Leonori et al. / Procedia Structural Integrity 44 (2023) 1022–1029 Author name / Structural Integrity Procedia 00 (2022) 000–000

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Fig. 7. SOL-CAM ® numerical tests

2.4. The UNI CAM system to preserve historical exposed masonry For many historical buildings in Italy one always hopes to find a solution which combines structural safety and the original appearance of the exposed brickwork or stone. It is necessary to understand that using non-invasive technology means a loss in performing strength. In fact, a single side wall strengthening has a value equal to less than half of a reinforcement applied to both sides of the wall. In order to address this problem, while maintaining the three-dimensionality of CAM ® consolidation actions, a new solution called UNI CAM has been found. Observing the facades in historical buildings, one can notice that tie rods and their anchor-plates are visually accepted as a sign of historical reinforcement. So, one can imagine many small and widespread anchor plates on exposed masonry. On the opposite side of exposed masonry, ribbons create the one-sided CAM ® mesh. When they go through the wall, they arrive at a particular anchor plate that allows the return in the same hole. On the side that needs to be preserved, UNI-CAM anchor-plates remain exposed with minimal visual impact or can easily be recessed into the wall and hidden by a stone or any another element removed only locally. In all those applications where minimum intervention is necessary, the UNI-CAM solution can provide a reduced invasiveness and a visually unilateral intervention with a full transverse self-tightening tie effectiveness similar to the CAM ® System active sewing. The dimensions of the ribbons and the related anchor plates can be reduced according to aesthetic needs.

Fig. 8. UNI-CAM arrangement