PSI - Issue 62

Luigi Petti et al. / Procedia Structural Integrity 62 (2024) 16–23 2 Petti L, Montuori R, Lupo C, De Gaetano CM, Guida D, Loncarevic D and Repetto E/ Structural Integrity Procedia 00 (2019) 000 – 000 1. Introduction The Italian road network is exceptionally articulated, owing to the complex geological structure and geomorphological setting of the territory. In particular, in terms of infrastructures, it is possible to count 3 international tunnels, 566 tunnels, and 1,718 bridges along the highways, as well as around 1,200 tunnels and 11,000 bridges on roads managed by ANAS. Furthermore, there are also approximately 30,000 bridges, viaducts, and tunnels along provincial roads [Ministry of Infrastructure and Transport (2019), Pierluigi B, 2019]. Most of these assets are dated (around 52% were built after the Second World War and before the 1980s) and they are often characterized by advanced decay state due to a lack of maintenance activities. In addition, each infrastructure has been conceived and built according to the environmental conditions of the crossed areas, as well as the construction regulations at that time, and even if on the same route, these can present relevant differences concerning the materials, the geometric dimensions, the static schemes, and the construction details. This situation presents a possible difficulty in developing an efficient standard Bridge Management System (BMS). In Italy, a great contribution was made by the adoption of the “Guide lines for the Risk Classification and Management, Safety Assessment and Monitoring of Existing Bridges ” [Ministry of Infrastructure and Transport (2020a)] - Annexed to the opinion of the Superior Council of Public Works No. 88/2019” [Ministry of Infrastruc ture and Transport (2020b)]. LG20 has been developed by a commission of experts with the aim to define and standardize the criteria for monitoring, assessing structural safety, and classifying the risk of existing bridges. In particular, the main goal is to guarantee acceptable levels of risk, through the implementation of a multilevel knowledge process to support the maintenance management of existing bridges. The guidelines can be considered as a specialized standard, in agreement with the provisions of the NTC2018 [Ministry of Infrastructure and Transport (2018)], conceived to take into account the bridge vulnerability, the environmental hazards (seismic, landslide, flooding, etc.), and the exposure (traffic loads, etc.) to evaluate the infrastructural risk. LG20 look at a quick identification of the road infrastructure to prioritize for intervention to be performed, thus ensuring savings in terms of human, economic, and time resources [Petti L et al., 2023]. In order to meet the requirements defined by the standards and simplify the management of maintenance and monitoring processes, the BMS must be integrated with the most modern technologies and tools, with a view to digitalisation, managing and collecting overall information in a database. In particular, the BMS platform needs advanced/integrated BIM and GIS representations to develop a Digital Twin of the infrastructures. Currently, several study cases related to the LG20 in a national context [Santarsiero G. et al. (2021), Buratti, G. et al. (2022), Capogna M et al. (2023), Di Sano S et al. (2023)] and several international experiences [Gul W (2019), Abdallah AM et al. (2022), Jin X (2022), Mufti A et al. (2021), Fujino Y and Siringoringo D M (2020)] are available. Moreover, a comparison between the Italian and UK guidelines has been made [Pregnolato M et al. (2022)]. This study describes a new methodology developed by CUGRI to support surveillance activities on the A3 highway, which connects Naples to Salerno in Southern Italy, within the LG20 requirements. Nomenclature A1-E45 A1 Highway (Milan-Naples) A2-E45 A2 Highway (Salerno-Reggio Calabria) A3-E45 A3 Highway (Naples-Salerno) AINOP National Archive of Public Infrastructures ANAS National Autonomous Roads Company S.p.A ASPI Highways for Italy S.p.A CUGRI Inter-University Research Center for the Prediction and Prevention of Major Hazards ISPRA Italian Institute for Environmental Protection and Research PGRA Flood Risk Management Plan SAM Southern Highways Company S.p.A SIS-SPN Stable Consortium SIS Scpa - Naples-Pompeii-Salerno S.p.A Company 17