kajima corporation
Tokyo, Japan
This is a high-rise complex building construction project that will be a landmark in the urban redevelopment project along Midosuji, Osaka-city's main street.
We constantly shared digital information among the client, designers, builder and O&M team to coordinate with one another and resolve issues such as conflicts in a short time.
ST-Bridge, which is standard format for "structural analysys model" information exchange developed by buildingSMART Japan, was used.
ARCHICAD, Revit, Solibri Model Checker, Japanese structural analysis software SS3 and Japanese MEP engineering software Rebro.
Rebro is IFC-compatible software approved by buildingSMART Japan.
• "BIM strategic meeting" also known as "Big Room" meeting involving the client, designers, builder and O&M team took place onsite several times a week to harmonize the whole BIM workflow challenges.
• Using IFC to perform conducting computational fluid dynamics for airflow analysis reduced the effort and time required
• Digital asset management, facility management and building management
• Delivered on time and under budget
4-2-3 Hiranomachi, Chuo-ku, Osaka 541-0046, Japan
This paper reports a part of an example of efforts aimed at improving productivity by carrying out BIM data operation from design to building maintenance, aiming at strengthening design and construction ability based on BIM and constructing a next generation type new production system.
In Japan, the construction industry is facing serious labor shortages and rising material and labor costs. Furthermore, in this project there was only 12 months left between the signing of contract and grandbresking. Under these circumstances, the contractor and O&M team participated in the early design phase and through concurrent engineering, BIM models for design, steel frame and various facilities were built in detail. We identified issues and finalized information on BIM, thereby building a completion model before groundbreaking. BIM and Concurent Engineering(CE) by IPD approach reduces the time from design to detailed review and improves Total Quality Control(TQC).
Specifically, the conventional workflow is typically designed by an architect, followed by a structural engineer who performs the analysis, then the equipment is verified, and any conflicts that occur are checked again in a similar cycle. However, in this project, the full BIM model operation was carried out from the design stage, and the persons concerned in the project gathered together, and the BIM data was always shared, and the "BIM strategic meeting" to solve the problem was held, and the design drawing with high accuracy was able to be made in a short period.
In addition, from the construction stage, the O&M team also joined, shared data in the same way and created data necessary for maintenance. While verifying what kind of information should exist in building management after completion, work is being carried out to give necessary attributes to the construction BIM model created at the site, and it is in the stage of searching for data cooperation with building management tools.
In terms of data exchange, we verified the optimum diffuser position by air flow simulation evaluation using IFC, and based on the results, we used BIM's takeoff function to reflect the module with the smallest material volume than the module model with multiple patterns on the construction plan. And as a result of data exchange between Japanese structural analysis software and ARCHICAD using ST-Bridge, which is a standard format for information exchange developed by buildingSMART Japan, it became possible to carry out initial verification with high accuracy and to grasp the amount of steel. Further, by linking the BIM model and the FM system, the system information and attribute information of the equipment expressed on the BIM model can be viewed on the FM system. This allows the system to be viewed in three dimensions via a 3D viewer, and allows drawings to be viewed from the FM system without opening the BIM model. Furthermore, by accumulating the work history of buildings, the failure rate of each equipment, and the failure locations as Big data, we hope to feed it back to the planning and design stages of the next project and use it for overall optimization.
• Sharing IFC data among the client, designers, builder and O&M team to coordinate with one another and resolve issues such as conflicts in a short time.
• Using IFC to perform conducting computational fluid dynamics for airflow analysis reduced the effort and time required
• Using ST-Bridge, a standard format for information exchange developed by buildingSMART Japan, to exchange data between Japanese structural analysis software and ARCHICAD
• Delivering IFC data from site to O&M team for digital asset management
・Improve total QC
・On schedule
・Improve owner satisfaction by providing accountability to the government and local residents using BIM
