Artificial Intelligence and Data Science
Online ISSN : 2435-9262
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Displaying 1-6 of 6 articles from this issue
  • Pang-jo CHUN, Masato ABE
    2024 Volume 5 Issue 4 Pages 1-3
    Published: 2024
    Released on J-STAGE: December 27, 2024
    JOURNAL OPEN ACCESS

    The concept of “i-Construction” is being promoted to improve productivity at construction sites by utilizing ICT and other technologies throughout various processes, from surveying and measurement to design, construction, and maintenance. In this context, there is growing interest in BIM/CIM (Building/Construction Information Modeling) as an information infrastructure to drive digital transformation (DX) in the construction sector. This paper collects and publishes discussions on the efforts related to BIM/CIM, including past initiatives, international standardization, domestic standards and applications, as well as its practical use in design and construction, highlighting contributions from industry, government, and academia.

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  • Nobuyoshi YABUKI
    2024 Volume 5 Issue 4 Pages 4-14
    Published: 2024
    Released on J-STAGE: December 27, 2024
    JOURNAL OPEN ACCESS

    The background factor behind the inability to feel the effects of digitalization may be the “data enclosure syndrome.” We should adopt a new mindset and utilize databases. Databases input and update data based on a data model. A data model abstracts and systematizes the information structure. The origin of BIM is computer graphics (CG), and the resulting creations are referred to as shape models. The 3D shape model of BIM is primarily a solid model. BIM conducts design processes for architecture, structure, equipment, and production concurrently and proactively. By leveraging design data, we aim for overall optimization. To achieve this, it is necessary to standardize 3D product models and enable data exchange and sharing. For automation, standardizing terminology is essential so that machines can understand the data.

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  • Yugo MASUYA
    2024 Volume 5 Issue 4 Pages 15-28
    Published: 2024
    Released on J-STAGE: December 27, 2024
    JOURNAL OPEN ACCESS

    The Ministry of Land, Infrastructure, Transport and Tourism has developed “i-Construction 2.0” aimed at automating construction sites. This initiative focuses on three main pillars: 1) automation of construction processes, 2) automation of data integration (digitization and paperless operations), and 3) automation of construction management (remote and off-site operations). As part of this effort, BIM/CIM has been applied as a general principle since last year. We have identified both issues that have been resolved and ongoing challenges.Currently, the main initiatives are “linking 3D models with 2D drawings” and “utilizing attribute information.” The former aims to align key components of the 3D models with the 2D drawings. The latter targets cost estimation by automating the input of quantity data to reduce human errors and simplify checks, while also being applicable at various stages of the project. Data integration through BIM/CIM needs to be approached systematically across the entire project. We plan to further increase use cases to promote BIM/CIM in the future.

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  • Yoshiyuki MIYAUCHI
    2024 Volume 5 Issue 4 Pages 29-32
    Published: 2024
    Released on J-STAGE: December 27, 2024
    JOURNAL OPEN ACCESS

    The Tower of Babel illustrates the importance of enhancing interoperability through standardized data. The solution to the problems of data silo is IFC and bSDD (buildingSMART Data Directory). Using bSDD simplifies data input and dramatically accelerates interoperability. In BIM, the key to data integration is the exchange of attribute information both within and across sectors. The openBIM® workflow, which facilitates data integration, utilizes world-class standards in IFC and BIM technology. It is crucial to fully leverage the technical standards that support IFC when building workflows. Relying on specific software or closed technologies is very risky, and we must always consider “sustainability.” Workflows must be open and highly interoperable to ensure that even those with only construction knowledge can effectively use BIM.

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  • Junji GOKAN
    2024 Volume 5 Issue 4 Pages 33-38
    Published: 2024
    Released on J-STAGE: December 27, 2024
    JOURNAL OPEN ACCESS

    The construction management of RC structures is complex. Creating a schedule takes time, and selecting the appropriate processes is also challenging. To address these issues, Kajima Corporation has been working on developing an automated schedule creation tool. The main improvements include automating quantity calculations and optimally selecting from multiple schedules. The automated scheduling tool operates by creating pour divisions based on a 3D model, inputting construction information, and determining construction steps. When this information is converted to CSV data and fed into the software, a schedule is generated. For formwork, scaffolding, and shoring, “AutoCAD” is used. The workflow is defined and systematized by individual components, allowing for the calculation of end dates based on fluctuations in procurement plans and the number of times shoring is repurposed, leading to optimal solutions. Additionally, the company is developing an automatic layout optimization system for formwork and working on technologies to improve the efficiency of rebar processing and assembly tasks.

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  • Masashi HOSOYA
    2024 Volume 5 Issue 4 Pages 39-46
    Published: 2024
    Released on J-STAGE: December 27, 2024
    JOURNAL OPEN ACCESS

    At IHI Infrastructure Systems, a steel bridge manufacturer, the primary application of BIM/CIM is in construction (from the start to completion). However, the data provided from the design phase cannot be read by the factory systems. To address this, we tested the effectiveness and challenges of data integration through trial projects. Traditionally, the most inefficient aspect was the actual size process, so we implemented a database for data utilization. As a result, the most significant benefit was the acceleration of the 3D model, which enabled the automation of interference checks. While the impact on reducing labor in the actual size process was minimal, key challenges were identified. Additionally, we have started utilizing BIM/CIM in maintenance management. For the maintenance of long-span bridges, we are exploring how to effectively use models and attribute information. Notably, the identification of defect locations has become significantly more efficient with the use of AR technology, making it easier to understand defect distribution. However, directly applying upstream models has proven difficult, and we are currently in the process of trial and error.

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