PSI - Issue 62

Alberto Brajon et al. / Procedia Structural Integrity 62 (2024) 32–39 A. Brajon et al. / Structural Integrity Procedia 00 (2019) 000 – 000

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Fig. 2. Panoramic view of case study 1.

3.2. Case study 2 The bridge being evaluated (Fig. 3) is in a region of Northern Italy and stands out for its historically valuable construction. Positioned along a railway line, the work is made up of 16 masonry arches that rise above a river. Each arch has a span of 25 meters (theoretical distance between the shutters), and the structure reaches a maximum height of 40 meters in the central spans. Overall, the bridge extends for approximately 400 meters and is a focal point for the railway traffic that passes through the area. Furthermore, the bridge is equipped with a pedestrian path that allows even pedestrians to cross the river. In the context of this study, specific attention was focused on pier number 2. Also in this case the selection of the pier was carried out considering its significance.

Fig. 3. Panoramic view of case study 2.

4. Summary of the results The analysis is developed with reference to multiple images of the investigated piers; in particular, the adopted strategy is the quadrant scheme dictated by the DOMUS Manual, provided by RFI Italian railway network (2019) for railway infrastructures (first field of application of the software ADD_B ©). This is a more detailed approach than the LG22, which allows to directly consider the entire pier to be analyzed. In detail, the type of investigated piers for both case studies, wall piers, leads to the processing of a total of 12 images for pier, where each image identifies a quadrant: 4 quadrants in the front part, 4 in the back part and 2 for each lateral face. The level of detail with which the software describes the nature, extension and intensity of the defects is highlighted in the example in Fig. 4, where three photographs are shown, one for each of the investigated piles.