What is the core point of BIM design consultation? What are the most important points?

? Engineering design is the leader of engineering construction. In the past 20 years, the popularization of CAD technology has made architects and engineers move from manual drawing to electronic drawing. The technical core of building information model (BlM) is the database formed by three-dimensional computer model, which contains not only the architect's design information, but also the whole process information from design to completion and even the end of service life. All kinds of information are always built in a three-dimensional model database. Building Information Model (BIM) can continuously and instantly provide information about project design scope, schedule and cost, which is complete, reliable and completely coordinated. Building Information Model (BIM) can keep information constantly updated and provide access in a comprehensive digital environment, so that architects, engineers, constructors and owners can clearly and comprehensively understand the project. This information can speed up the decision-making progress and improve the decision-making quality in the process of architectural design, construction and management, thus improving the engineering quality and increasing the income.

The core points of BIM design consultation include:

1. Parametric design

? Parametric design is essentially a component combination design, and the building information model is composed of numerous virtual components. Component design does not need to use too many traditional modeling languages, such as stretching, rotation, etc., but set corresponding parameters for the established component (called family) and make the parameters adjustable, thus driving the shape of the component to change and meet the design requirements.

2. Component related design

? Component-related design is a derivative of parametric design. When all components in the building model are controlled by parameters, if we relate these parameters to each other, then we realize relational design. In other words, when the architect modifies the component, the building model will be updated automatically, and this update is interrelated. For example, in practical engineering, we often encounter the situation of modifying the height of each floor. In the building information model, all walls, columns, windows and doors will change automatically as long as we modify the elevation values of each floor, because the parameters of these components are related to the elevation, and this change is three-dimensional, accurate and synchronous. We no longer need to modify the horizontal profile separately. Relevance design not only improves the efficiency of architects, but also solves the long-standing problems of mistakes, omissions and deficiencies between drawings, and its significance is obvious.

3. Parameter-driven architectural form design

? Parameter-driven architectural modeling design refers to the method of generating architectural modeling by defining parameters. When the architect changes the parameters, the shape can be updated automatically, thus helping the architect to study the shape. Parameter-driven architectural modeling design can still be achieved by defining components. If we want to design a complex high-rise building, we can take each floor of the high-rise building as a component, then define and describe the geometric shape of this floor with parameters (including some simple functions), and finally connect the parameters of the upper and lower floors. In Revit, there is another convenient tool-mass. Mass design is closer to the working mode of architects. Architects can start with quality review without having to care about the relationship between quality and size parameters. When the mass inspection is satisfactory, they can attach building components with real properties to the mass, such as curtain walls, walls and floors to shapes. The powerful function of mass mode is that when we modify the mass again, the original attached building components can be updated accordingly. This actually realizes the design mode of "shape before size", and its technical idea is close to "variable solid modeling technology"

4. Collaborative design

In the past, the cooperative design we understood was usually the professional cooperation between architecture and structural water heating and electricity. In today's increasingly complex architectural engineering, interdisciplinary cooperation has become the trend of architectural design.

? In the era of two-dimensional CAD, collaborative design lacks a unified technical platform, and building information model provides a good technical cooperation platform for traditional building work. For example, when structural engineers change the size of their columns, the columns in the building model will be updated immediately, and the building information model also provides a good cooperation platform for different production departments and even management departments. For example, construction enterprises can add time parameters to the building information model for construction virtualization, control the construction progress, and government departments can review electronic drawings. This not only changes the traditional work coordination mode of architects, structural engineers and equipment engineers, but also allows owners, government departments, manufacturers and construction enterprises to work together based on the same building model with three-dimensional parameters.

? Among them, parametric design is the core point, which simulates various real attributes of building components in the form of parameters, and makes statistics and calculations on relevant data. In the building information model, the building component is not only a virtual visual component, but also can simulate some non-geometric properties besides geometric shape, such as fire resistance rating of materials, heat transfer coefficient of materials, cost of components, purchasing information, weight, stress status and so on.