PSI - Issue 62

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

221

5

personalized settings for drawings, customize reports, and export data in IFC format. Additionally, Property Sets were customized for Work Breakdown Structure (WBS) and Classification purposes. These aspects, particularly the export of data in IFC format and the utilization of custom Property Sets for WBS and Classification, assume significant importance within a global, shareable, and contemporary project framework. They serve as a vital link to various other disciplines in the construction chain and are fundamental for effectively overseeing the project. The classification Property Sets have been implemented at three distinct levels: bridge type identification, assemblies of model objects, and individual model objects, aligning with the IFC standard (UNI EN ISO 16739). Closely related to classification, but not quite the same, is the Work Breakdown Structure (WBS). It's a top-down decomposition of the structure designed to create an analytical framework with sufficient detail to simplify project management processes. The WBS is typically represented as a tree structure governed by hierarchical logic, with increasingly detailed levels that lead to the identification of manageable and measurable work packages, often referred to as the "leaves" of the tree. As you move down the tree structure, the level of detail increases, aiming to provide a clear description of deliverables (services, products, or partial results) and unambiguous identification of responsibilities and contractual references associated with work packages. An essential aspect involves assigning unique and consistent codes to each level and package within the WBS. The most commonly used coding scheme involves adding components to the code as you progress through the WBS levels. In our proof of concept, we employed a specific tool called WBS Controller, developed for Tekla Structures. These are the primary advantages gained from its use: creation/import of multilevel WBS trees, associating WBS nodes with modeled parts through a user-friendly drag-and-drop interface, automatic population of user attributes related to the WBS, selection and display of all elements connected to the highlighted WBS node. It is essential to emphasize that, while classification is standardized by regulations, the WBS decomposition is the responsibility of the designer. In the following we will describe some of the choices made for the La Botte bridge project.

Fig. 3. Some parts of WBS tree for La Botte bridge.

First and foremost, we designated the South-North direction as the primary ordering principle for object numbering. Secondly, within each group, components were processed following an East-West order. The entire asset was conceptualized as comprising four major sets of structural elements: foundations, sub-structures, the deck, and a final group containing other constituents, such as joints and support devices. Subsequently, each of these four macro components was further subdivided. The foundations consist of two distinct elements for load distribution in the ground: slabs and piles. Although they constitute a single type of foundational structure (deep foundations), we chose to distinguish between these two resistant contributions because they are constructed at different times and with different technologies, making them capable of functioning independently.