PSI - Issue 62

Adalgisa Zirpoli et al. / Procedia Structural Integrity 62 (2024) 217–224 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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All the aforementioned data are georeferenced using plane coordinates according to the Coordinate Reference System (CRS) with the EPSG 3003 identification: Monte Mario/Italy Zone 1. This georeferenced information was crucial for constructing the infrastructural model, ensuring compatibility within a collaborative ecosystem configured precisely according to EPSG 3003. In the Infrastructural BIM platform used (Trimble Quadri), terrain data for the entire province were further triangulated to focus on the specific area of interest, thereby creating a DTM for La Botte Bridge. The combination of this orographic data, a portion of the road network graph, and the WMS information enabled the identification and accurate georeferencing of the bridge. This process established a reference database for structural BIM modeling tools. Additionally, the data could be visualized in a georeferenced manner through the web interface, providing the capability to view the area of interest and associated information. Users also have the option to include additional layers, such as Open Street Map, Bing Aerial, and more, in the map views. Furthermore, a direct link with the data-sharing environment (Trimble Connect) was utilized to exchange the DTM model in open IFC and LandXML formats. This data served as a georeferenced foundation for subsequent structural modeling of the bridge. Now, the digital twin of the bridge begins to take shape. To achieve this goal, Trimble's Tekla Structures structural modeling software was utilized, specifically employing the Bridge Creator plug-in. It allowed for the extrusion of cross-sections along reference axes, which were imported in LandXML/DWG format from the Infrastructural BIM platform. The plug-in also facilitated complex geometry modeling, including objects with double-curved reinforcement. After importing the elevation profile in DTM format, the bridge's primary components, such as the main girders, pilons, slab foundations, and piles, were meticulously modeled along the entire span. The choice of reference zero was made in accordance with infrastructural discipline, and it was decided to work as close as possible to the origin to prevent excessively large coordinate values. The modeling process began with the core elements of the deck, starting with the longitudinal beams and arches, followed by the transverse beams and abutments. Subsequently, the model was enriched with secondary elements like joints, supports, and more. To facilitate collaboration, the model was shared through the Tekla Model Sharing service. This service allows BIM Specialists and BIM Coordinators to collaborate on the same model in real-time, streamlining the design and modeling process.

Fig. 2. The BIM model.

Thanks to customized settings tailored to fulfill the modeling requirements of existing bridges, several functionalities were made possible. For instance, it became feasible to generate custom model views, employ