In recent years, construction projects have been steadily increasing in number, with the scope of work continuously expanding. The use of BIM technology in prefabricated building design by construction professionals has significantly enhanced overall design quality and work efficiency.
Specific Applications of BIM Technology in Prefabricated Building Design
1. Model Deepening
During the prefabricated design phase, many disciplines face similar challenges and require highly detailed work. Design content and costs must be strictly controlled. Traditional design methods no longer meet the demands of prefabricated buildings, but BIM technology enables component separation and assembly through collaborative, parametric workflows. Starting from construction drawings, BIM creates a range of building information data such as floor height, door and window openings, wall thickness, and floor thickness. This data ultimately forms the BIM information structure and a 3D building model.
Next, based on the structural model, mechanical, electrical pipeline, and decoration models are developed. Conflict analysis reports are generated from model issue logs, allowing for problem identification and the creation of appropriate solutions. Virtual reality technology is then used to simulate construction processes and work outcomes, enabling plan selection and optimization ahead of time. Additionally, immersive model walkthroughs provide a realistic sense of the actual site conditions.
2. Application of BIM in Deepening Design
The Revit family library serves as a unit for editing and managing various family files, supporting the detailed design of prefabricated components. It integrates external contours, embedded parts, and reinforcement forms of prefabricated elements. Components can vary according to their outer shapes, while standard embedded parts are positioned according to general requirements. The Revit family library draws and stores these parts as conventional measurement models based on files.
Family drawings are based on the shape of steel bars within components and allow editing parameters such as steel bar specifications, bending angles, and defining reference planes. For example, a sandwich wall panel consists of an outer and inner panel. The outer panel includes a decorative surface layer and an insulation layer. The surface layer is modeled as a single brick (differentiated by color) within a family file. The insulation layer is parameterized based on geometric information like external contours, edges, and panel thickness to define its material.
The BIM model acts as a common information carrier, allowing different project branches to insert, extract, and update data, facilitating collaboration across disciplines. BIM technology effectively maintains data consistency between floor plans, elevations, part drawings, and detail drawings, enhancing analysis capabilities and accurately conveying project intent.
3. Drawing Deepening
After creating a 3D BIM component model, teams generate detailed BIM drawings by converting component data into 2D construction drawings, which are then used for component processing and production. Large-scale projects often require numerous components with diverse types, making traditional industrial prefabrication processes labor-intensive and prone to calculation errors.
With BIM technology, these issues are addressed effectively. Computer software automatically analyzes component data and creates production models. Unlike traditional design approaches, BIM-based 3D part design models update associated indexes and data automatically when changes occur, reducing inconsistencies during the design process.
4. Visual Design
For prefabricated exterior wall panels, technical control focuses on the layered structure of insulation, node structure, and insulation. To simplify complex shapes, BIM models of exterior wall panels are constructed using prefabricated methods to optimize structural positioning. Model parameter information is synchronized in subsequent drawings through real-time data updates.
This synchronization between digital information and graphical views ensures the integrity of BIM information models throughout design and use, greatly improving design efficiency for prefabricated buildings. It also eliminates information conflicts caused by human error in traditional design workflows.
In summary, this article has outlined how BIM technology can be effectively used in prefabricated building design. We hope this information proves helpful to everyone!
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