PSI - Issue 64

Anna Sanseverino et al. / Procedia Structural Integrity 64 (2024) 1271–1278 A. Sanseverino et al. / Structural Integrity Procedia 00 (2019) 000–000

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preserve historic bridges by incorporating these aspects into the “Attention Classes” (CdAs) (Marra et al., 2021). Therefore, in the following, we present an operational workflow developed initially for the Olivieri Viaduct (Salerno, Italy) and later optimized for 207 bridges, viaducts, and overpasses on the A3 highway between Naples and Salerno 5 . It leverages BrIM to support the classification of infrastructure and structural components while automating the assignment of monitoring forms according to regulations and standardising data exchange between information models and the monitoring platform. 2. Method: Monitoring ECO-System methodology for the digitisation of the existing infrastructure heritage To manage built heritage exploiting the full potential of Digital Twins, it is essential to define an information system, such as the proposed monitoring Digital ECO-System, i.e., an Enriched COoperative System (Parrinello et al., 2023), which aims to produce interoperable models that can connect to different systems and scales, such as BIM and GIS. The digitization of built heritage can be efficiently implemented in three main steps: i) Data Collection, concerning general and specific documentation (DOC) as well as digital 3D surveying (3DS); ii) BIM Modelling, which further consists of four iterative steps: Georeferencing (GEO), working in a federated environment where a common set of standards has been defined (FSC), 3D geometric modelling (3DM), paying particular attention to the granularity of the information to be added, as specified by the current legislation – European legislation ISO 19650-1:2018, adopted via the Italian UNI EN 17412-1:2021 – in the definition of the "Level of Information Need" (LOIN); iii) Data sharing for monitoring and management, preferably in open formats such as Industry Foundation Classes (IFC) (Borrmann et al., 2019) and GeoBIM models (Bortot and Paolo, 2020; Di Benedetto et al., 2021). These phases must work together synergically and continuously, similar to a physical ecosystem that responds to external feedback. Implementing a Visual Programming Language (VPL) can enhance the BIM modelling process by allowing direct manipulation of parameters for both geometric design and non-graphic information, which populates the BIM database. To comply with the regulations in force – the LG20 (DM 578/2020), the ASPI (“Autostrade per l’Italia”) Surveillance Handbook (ASPI, 2020) and AINOP (Retico et al., 2020) – an inspection method has been developed to combine cataloguing and assessment requirements. This was done in collaboration with C.U.G.R.I., which also developed online monitoring software to optimize visual inspections as per LG20. The developed BMS-type platform design aims to create a structured database that integrates the register data of Italian infrastructure – as required by AINOP –, updated information from in-situ inspections, and 3D models imported through open-exchange IFC models. 2.1. Proposal for a procedural workflow aimed at digitising the infrastructures included in the C.U.G.R.I.-SAM agreement The methodological procedure – first developed and optimised on the pilot case of the Olivieri Viaduct case study – consists of two main phases: I) Modelling, cataloguing, and exporting of BrIM models and the related datasets towards the C.U.G.RI. monitoring platform (see Fig. 1); II) Populating the models within the BIM editing environment with “Relative Defectiveness – Dr” data defined at L2 (see Fig. 2). The first phase of the digitisation procedure starts with the cataloguing of the elementary components of a bridge, which is first analytically broken down by the operators – who serve as both BIM modellers and inspectors – and then recomposed in a synthesis process represented by the BrIM modelling of the entire infrastructure 6 . Automation is employed to minimise the risk of errors when transferring information from the BIM repository to the monitoring platform developed by C.U.G.R.I. technicians. This includes precisely assigning monitoring forms for each component, following the Italian guidelines, by implementing four custom VPL (Visual Programming Language) scripts 7 . At this stage, the human component is again decisively involved in the figure of the inspector, carrying the inspection paper forms and camera and measuring instruments to the site, only to report later on the results of the surveys carried out within the monitoring platform (see Fig. 1). 5 The application was developed within the scope of the C.U.G.R.I. (Consorzio inter-Universitario per la previsione e prevenzione dei Grandi Rischi) agreement with the “Autostrade Meridionali” (SAM) company – and its later managing corporation, i.e., the “Naples-Pompeii-Salerno S.p.A” company, subject to management and coordination by the “Stable Consortium SIS Scpa” (SIS-SPN) – concerning the awarding of the “service for the surveillance of the major works of art of the A3 Naples-Pompei-Salerno”. 6 The BrIM models have been developed via the Autodesk Revit BIM authoring tool in its 2021.1.5 release. 7 The VPL scripts were developed within the open software environment Dynamo Revit in its 2.6.1.8850 release, employing both additional free packages, such as Orchid (v.206.3.0.8046), and a custom node “Elements.CorrespondingAtIndex” written as an “IronPython2” script and provided via the VPL scripts made available (Sanseverino, 2024a, 2024c).