GoI + GoA = GoG

[1]

The GoG Grades of Generation model generation classes dedicated to as-built models (for building management) and HBIM (BIM model for monuments) consist of GoI - Information Generation and GoA - Accuracy Generation. Scientific article by F. Banfi from ABC Department, Politecnico di Milano - BIM ORIENTATION: GENERATION CLASSES AND INFORMATION FOR DIFFERENT KINDS OF ANALYSIS AND MANAGEMENT PROCESSES - [2] well describes this classification and the progress in the possibility of using 3D scan for BIM as a necessary milestone on the road for full building management, i.e. 7D BIM. Below he quotes its most important passages:

The architecture, engineering, and construction (AEC) industry is facing a massive redesign of management procedures for new construction, and recent research shows a significant increase in the benefits of Building Information Modeling (BIM) methodologies. This innovative approach requires new information and communication technologies (ICT) solutions to improve collaboration and interoperability between different actors and disciplines. Therefore, BIM can be described as a new tool capable of collecting / analyzing large amounts of information (Big Data) and improving the management of a building throughout its life cycle (LC). The main purpose of this research is, in addition to reducing production time, to reduce physical and financial resources (economic impact), to demonstrate how technology development can support a complex generation process with new digital tools (modeling impact). This article reviews the recent BIMs of various historical Italian buildings, such as the Collemaggio Basilica in L'Aquila, the Masegra Castle in Sondrio, the Basilica of St. Ambrose in Milan and Visconti Bridge in Lecco, and a methodological analysis was performed to optimize the input and results combining different data and modeling techniques in a single hub (cloud service) by using a new generation (GoG) and information (GoI) level (impact on management). Finally, this study demonstrates the need to orient the GoG and GoI to a different type of analysis that requires both high-end accuracy (GoA) and an automated verification system (AVS).

Document Cited

The benefits of MMSI are not limited to morphological and geometric aspects, but to improving management information about the intangible values ​​of the heritage being built.

The entire model can be fully characterized by GoG 1 or the alternation of all GoGs (from 1 to 10). They can harmoniously coexist in the same BIM, providing greater stability during 3D reconstruction. The real benefits of a system that can include any information can be realized if every single architectural and structural element is realized. This allowed you to log into the BIM logic to connect / create and orient any information and automatically calculate each item, keeping the parametric type of Information Management System. AMT integration played a decisive role in presenting the complex forms of historic buildings, characterized by irregular walls, complex vault systems, pillars and various types of arches. These geometric singularities have been demonstrated by going beyond the simple basic modeling offered by parametric software. The image shows ten GoGs, from the simplest to the most complex. Each GoG is geometrically represented by its primitive geometric properties, the required modeling transformation, and the final 3D object. Generation Class (GoG) for existing and HBIMs. The tested method allowed for the parameterization of a complex 3D object. The BIM application requires GoG 9 and 10 to enable automatic generation of complex 3D objects from point clouds.

GoI 01 made it possible to define the following information for each architectural and structural element: Application: Structural or architectural dimensions: height, width, length, area, volume Identification data: type, image, description, model, manufacturer, type comments, URL, description, code assembly, type designation, fire resistance, cost steps: Created: existing or new structure; Demolition - existing or new structure function: interior, exterior, foundation, fastening, soffit Material and finishes: family, type, total thickness, resistance (R), layer and stratigraphy information

GoI 02 has raised the level of information. Includes: Analytical Properties: Heat Transfer Coefficient (U), Thermal Resistance (R), Thermal Mass, Absorbance, Physical and Thermal Material Information: Name, Description, Keyword, Type, Subclass, Source, Source URL, Properties, Light transmitted, Isotropic or orthotropic behavior, Thermal conductivity, Specific heat, Density, Emissivity, Transmittance, Porosity, Reflection, Electrical resistance, Density, Young's modulus, Poi factor Suction, Linear Modulus, Yield Strength, Tensile Strength Appearance: Information Name, Description, Keywords, Wall Paint, Finish, Tone Graphics: Shading, Color, Transparency, Surface Pattern, Color Alignment, Texture, Mapping

GoI 03 represents a cloud-based holistic system in which all involved users can expand their knowledge of the heritage being built. BIM required orientation in various disciplines. Each discipline has implemented its own process. The latter defined their own national level of detail (LoD) or information level (LoI). The BIM cloud allows two approaches: the first approach is characterized by internal databases (bidirectional logic) and the second is to connect an external database via a specific plugin such as DBLink. The flexibility of MMIS has allowed different disciplines (not included in the model management process) to define their own level of development, detail and information.

The combination of 3D digital measurements, AMT, NURBS modeling, parametric applications and monitoring datasets required a special development of the structural health monitoring (SHM) archiving and visualization system at the HBIM of the Azzone Visconti Bridge. The availability of a BIM database in the digital cloud has made it possible to integrate various types of data such as reports, tables, charts, etc. With a representation directly linked to the structure with the new GoG 09 and 10 for structural elements such as arches and vaults. Finally, the BIM model of St. Ambrose in Milan was the main challenge for developing a model capable of interacting with different historical phases. Interpretative analysis of construction elements and their historical archives allowed for the creation of a model capable of representing complex forms and disseminating specific information at different time phases. The third dimension has given way to an innovative methodology that can reflect historical thresholds by finalizing the Automated Verification System (AVS) of the previously mentioned HBIM.

The definition of GoGs, GoIs and GoAs is not intended to replace various national reference laws, but its main purpose was to describe how it should be possible to increase the bi-directional flow of information between a 3D object and data over time. Industry, research, and government can benefit from BIM through the free bundling process. Future as-built projects will be able to relate to MMTS, favoring a detailed description of how the model was generated (GoG), linked information (GoI) and which is the degree of accuracy between each 3D object and point clouds (GoA). The results show that the defined GoA and Automated Verification System (AVS) can be considered as quality control criteria for "Scan to BIM". Our generations have seen them move from drawing to China and from 2D CAD to BIM in an instant. For this reason, future research will not stop at representing buildings through BIM projects, but will certainly find new innovative ways to implement new management techniques for our building heritage.

Sources:

[1] pixabay.com; author: Heiko S.

[2] F.Banfi; BIM ORIENTATION: GENERATION CLASSES AND INFORMATION FOR DIFFERENT TYPES OF ANALYSIS AND MANAGEMENT PROCESSES - ABC Department, Politecnico di Milano, Piazza Leonardo da Vinci 32, Milan, Italyfabrizio.banfi@polimi.it http://www.gicarus.polimi.it; Commission VI, WG VI / 4; https://pdfs.semanticscholar.org/047c/2b81fdae926c92adf48374c5a0537a1ee3cc.pdf