PSI - Issue 64

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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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For instance, the arched structures need additional specification according to their structural behaviour – be it closer to a beam (“tr”), a slab (“sl”), or a proper arch (“ar”) – while plinths, foundation rafts, and piles are categorised differently according to the relative superordinate element (see green area of the code in Fig. 3). Table 1. Extract of the “DM 578/2020 – All.B” form number assigned to arched structures according to the component type. For the complete updated schedule, see Sanseverino (2024c). Structural Sections ID Components ID „DM 578/2020 – All.B” form number

Main structure

SP 14, 15, 16, 17, 18, 19

10, 11, 12, 13 10, 11, 12, 13 10, 11, 12, 13

Longitudinal connections Cross-connections and partitions

IL IT TI IP

14, 15, 16, 17 14, 15, 16, 17

Arched structures

AR

Tympanum

10, 11, 12, 13 14, 15, 16, 17

Longitudinal connection between piers

3. Results: Data collection and BrIM modelling for the pilot case of the Olivieri Viaduct The Olivieri viaduct, built between 1954 and 1958 and belonging to the Salerno-Cava de' Tirreni Strategic Infrastructural Corridor, has an overall length of 136.80 m; it consists of a hyperstatic R.C. arch structure with a continuous frame deck over the valley and two viaducts. It has two additional continuous-frame spans on the Naples side and six continuos-frame spans on the Salerno side. Expansion joints are located at piers 2 and 12, where the arch springers are (see Fig. 4). Having already been modelled via a thorough scan-to-BIM approach implemented for the update of the relative state of knowledge within the framework of the “CUR_CIS2020_Metodologie per la valutazione puntuale del rischio idrogeologico in aree fortemente antropizzate e strumenti per le strategie di sviluppo regionale” project (Barba et al., 2021; Di Benedetto et al., 2021), the Olivieri Viaduct was selected to test the experimental workflow. The previous data collection and BIM modelling stages covered the digitisation process from the 3DS to the 3DM via the setting up of a federated (FSC) and georeferenced (GEO) environment. The parametric families of the structural components generated for the previous modelling phase were easily adapted to fit the discretization required by the regulation (see Fig. 4).

Fig. 4. BrIM structural model of the Olivieri Viaduct (left) with the classification data for the third “Structural Section” (right).

3.1. Definition of the “Level of Information Need” for the infrastructure artwork As for the LOIN implementation, Revit custom parameters are generated in the form of “shared parameters” stored in a TXT text file (see Fig. 5), which can, if required, be shared externally to transfer its contents to other projects. In the present case, two sets of shared parameters – the only type of external parameter that can be included in any schedule within the Revit software - were first created: “IFC” and “ASPI Regulation” (Regolamento ASPI). The former set included “IfcExportAs”, “IfcExportType”, “Site Name” parameters (see red parameters in Fig. 5), while the latter contains the identification codes of the Structural Assets provided by the Surveillance Handbook (see yellow parameters in Fig. 5). The ASPI parameters – “Partial Structure (Opera Parziale)”, “Structural Section (Parte d’Opera)”, “Structural Section Number (Numero Parte d’Opera)”, “Component (Componente)”, “Component Number (Numero Componente)”, “Form