PSI - Issue 62

Manuel D’Angelo et al. / Procedia Structural Integrity 62 (2024) 9–15 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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Fig. 3 and 4 show the distribution of the structural scheme of the bridge sample, distinguishing within each scheme the construction period and the prevalent deck material. Note that the subdivision for the structural scheme has been applied according to the one requested by the Guidelines. Arch bridges represent the majority of the total sample. Among those are distinguished Maillart and tied-arch, but they represent only a small percentage. Arch masonry bridges represent the most common bridge typology (27% of the total). They were typically built before 1945. A minor fraction is represented by r.c. arch bridges. Girder bridges are divided in simply supported, continuous, half-joint, and box girder bridges. Simply supported beams represent the second most frequent type of the stock, being the 33% of the total sample. This type of structural scheme was realized mainly after 1945; concerning the deck material, the majority were built in reinforced concrete (r.c.) and pre-stressed reinforced concrete (p.r.c). A minor percentage is represented by bridges with steel and wooden girders. On the other hand, continuous (4% of the total), half-joint and box girder bridges are less common in local municipalities context.

Fig. 3. Structural scheme distribution of the L0 sample subdivided according to the construction period

Fig. 4. Structural scheme distribution of the L0 sample subdivided according to the construction period