With the rapid rise and growing popularity of BIM in China, it has captured the attention of many, especially beginners who are still unclear about what BIM really is. Although the editor has previously addressed this topic, today we will revisit it with a focus on helping newcomers better understand What is BIM? What is the core of BIM? Hopefully, this article will provide some valuable insights.
1. What is BIM?
The American Institute of Architects (AIA) defines BIM as “a model-based technology linked to project information databases.” Similarly, expert Ghang Lee describes BIM as “the process of collecting and managing relevant information throughout a building’s lifecycle.” In essence, BIM is an information technology applied across the entire lifecycle of a project, with a strong emphasis on information sharing.
BIM creates an integrated network centered on information technology, vertically covering all phases from design and construction to operation and demolition, and horizontally involving various stakeholders such as owners, designers, contractors, supervisors, cost consultants, and suppliers. Through this platform, these parties can accurately, promptly, and conveniently access relevant construction information at every stage and make informed decisions.
BIM utilizes the most advanced modeling techniques available today, incorporating many specialized industry tools to represent building information in the greatest detail. As a new direction in building informatization, BIM has evolved from a purely theoretical concept into a practical application tool. It brings both new challenges and opportunities to the construction industry, spanning design, construction, management, and operation phases.
Designers can optimize and compare solutions more effectively using BIM models, while constructors can rely on more precise technical details than before. Project managers combine BIM with 4D simulation to enhance project management efficiency. After construction, mature BIM models also assist facility managers in maintenance and major repairs.
2. What is the core of BIM?
1. Parametric design
Parametric design is fundamentally about assembling components. A building information model is made up of countless virtual components, known as families. Instead of relying heavily on traditional modeling techniques like stretching or rotating, parametric design sets adjustable parameters for these components. Changing these parameters drives changes in component shapes to meet design needs.
2. Component correlation design
Component correlation design builds on parametric design. When all components in a building model are controlled by parameters, linking these parameters together creates associative design. This means that when one component is modified, the entire building model automatically updates with all related changes applied consistently.
3. Parameter-driven architectural form design
This approach generates architectural forms by defining parameters. When an architect adjusts a parameter, the form updates automatically, aiding in form exploration. For example, designing a high-rise with complex shapes can be approached by treating each floor as a component. The geometric shape of each floor is described using defined parameters, including simple functions. By associating parameters between floors—such as setting the twist angle between levels—the model can be driven to produce a series of building shapes by modifying these angles. This method is especially useful for creating regular yet complex architectural forms.
4. Collaborative design
Traditionally, collaborative design referred to cooperation among architecture, structural, plumbing, and electrical engineering disciplines. However, with increasing project complexity, interdisciplinary collaboration has become essential. For example, construction companies can integrate time parameters into BIM models for virtual construction and progress control, while government agencies can perform electronic plan reviews directly from the BIM data.
That wraps up our overview of What is BIM? What is the core of BIM? We hope this article has been helpful for everyone seeking to understand BIM better!
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