Brief introduction of Revit parametric design

Anyone who has come into contact with revit software knows that it has a parametric design. Perhaps beginners don't quite understand how the parametric design of revit is embodied, and there are many questions about parametric design. Therefore, this paper wants to share an introduction to the parametric design of revit and answer some questions about it. If you have this content, please read on. Introduction to Parametric Design of Revit Many partners have been exposed to Revit modeling, and some even participated in many projects and built many models. Today's content, we want to ask questions. Question 1: Have you ever been bothered by model accuracy? When modeling, we mostly aim at drawing and expressing, so it is enough to present the results, which leads to frequent collisions between walls, beams, plates and equipment in actual modeling, and collision inspection also tries to grasp the overall situation, otherwise it may not be solved by working overtime one by one. When your model has overlapping surfaces or unevenness, it will be a bit troublesome to render if you look at the heart. Even if these can be overcome, what about the application analysis and calculation after the model? Question 2: How do you do repetitive modeling? It is easy to say that the repetitive work in the big model is the worst. We always want to do some challenging work, but who hasn't done it mechanically? Question 3: Have you found any methods or videos of Revit bridge construction? As we all know, Revit is unprofessional in road and bridge construction. We are willing to use more professional software if possible, but the reality is cruel, the software is not enough, and we still have to do things. Most of what you can find online is just to write a general idea, or to demonstrate it simply and quickly, but there is no detailed and systematic operation flow on how to realize it. After thinking for a long time, both sides feel uncomfortable. These three questions all have a better answer: parameterization. There is a good parametric partner in Revit. Since Revit version Revit20 17, it has been integrated into Revit as a function in the management tab. It is Dynamo. The course we bring to you today is called Modeling of Dynamo Simply Supported Beam Bridge, which is a practical case course. Through this course, we can have a deeper understanding of the control of model accuracy, the treatment of repeated modeling, how to control Revit by using excel data table through Dynamo, and the description of some "brain-burning" calculation and modeling ideas will also be involved. The model needs to be established by software, and the bridge modeling generally chooses software A or software B. The advantages and disadvantages of these two softwares are also obvious. The disadvantage of a software is that there are too few "building blocks" to support the professional modeling of roads and bridges. The advantage is that you can make your own building blocks or borrow them. The advantage of B software is that there are enough "building blocks", but the disadvantage is that the word "expensive" is not affordable for every company. This course can't solve the problem that you can't afford to use B software, but you can make full use of the functions of A software as a bridge. Building blocks in Revit are also families. The architectural family is obviously different from the bridge family. Building component families are usually horizontal and vertical. Because of the superelevation and curve of the bridge, the bridge family will have slope, included angle and cantilever, which requires high accuracy. The drag-and-drop modeling method is obviously not suitable. After making the family, you need to put the family in the correct position in the project. You see, this is also a requirement for accuracy. Because there are all kinds of slopes on the bridge, positioning is not an easy task. Often draw a bunch of reference planes for positioning, but finally put them in the wrong position. Dinamo will be invited here. Dynamo can improve the efficiency of Revit and expand the operability of Revit. Imagine, and then work out "1+ 1=? In this simple operation, you can blurt out "2", but face "1234*432 1=? "So what? I believe that most people will silently take out their mobile phones and turn on their calculators. Dynamo is our calculator in Revit. In the course, we will explain to you how to locate various components. Using Dynamo positioning can avoid all kinds of problems of manual placement, and make your model accuracy reach the point where manual modeling can't be completed. The placement process often takes only a few seconds, which reduces the time spent on the model. And data entry. The difference between BIM model and other models is that it contains information, which requires the model to contain accurate data. Dynamo will be used for data entry in the course, which has two advantages: accuracy and speed. Let's not explain "quasi" here, but say "fast" first. If you often use Revit, you must know that when the scale of the project reaches a certain level, Revit will get stuck every time you enter a data. This stagnation is small but obvious. If you keep working in this situation, you will be in a bad mood and the efficiency of repeated operation will be very low. Try using Dynamo for batch input, which will make your work much easier. Dynamo can provide extra precision and progress for revit. Practical application to the project can greatly extend the BIM industry chain, speed up the preliminary work and contribute to the later operation and maintenance. Of course, BIM is not a suspended attic. In the final analysis, what is the application point in practical application? This paper mainly expounds the later application part and illustrates it with examples. 1. The cooperation with BIM on the construction site not only integrates the complete information of the building, but also provides a three-dimensional communication environment. Compared with the traditional mode, the personnel of all parties communicate after finding effective information from the drawing pile on the spot, and the efficiency of the project is greatly improved. BIM has gradually become a convenient communication platform for all parties in the construction site, allowing all parties to coordinate the project plan conveniently, demonstrate the manufacturability of the project, eliminate potential risks in time, and reduce the resulting changes, thus shortening the construction time, reducing the cost increase caused by design coordination and improving the production efficiency of the construction site. 2. The completed model is delivered to the building as a system. When the construction process is completed and ready for use, the building needs to be tested and adjusted to ensure that it can operate according to the original design. In the handover process after the completion of the project, the property management department needs not only conventional design drawings and as-built drawings, but also documents and materials related to operation and maintenance that can correctly reflect the real equipment status, material installation and use. BIM can organically integrate building space information and equipment parameter information, thus providing owners with a way to obtain complete building global information. Through the correlation between BIM and the recorded information of the construction process, even the completion information including the concealed engineering data can be integrated, which not only brings convenience to the subsequent property management, but also provides effective historical information for the owner and the project team in the future renovation, reconstruction and expansion process. 3. Maintenance plan during the service life of the building, structural facilities (such as walls, floors, roofs, etc. ) and facilities (such as equipment and pipelines, etc.). ) Need continuous maintenance. A successful maintenance scheme will improve building performance, reduce energy consumption and maintenance costs, and then reduce the overall maintenance costs. BIM model combined with operation and maintenance management system can give full play to the advantages of spatial positioning and data recording, formulate a reasonable maintenance plan, assign special personnel to carry out special maintenance work, and reduce the probability of accidents in the use of buildings. For some important equipment, the history of maintenance work can also be tracked, so as to judge the applicable state of the equipment in advance. 4. An orderly asset management system will effectively improve the management level of building assets or facilities. However, due to the separation of construction and operation information, these asset information needs to be entered through a large number of manual operations at the initial stage of operation, and it is easy to make data entry errors. A large amount of building information contained in BIM can be successfully imported into asset management system, which greatly reduces the time and manpower input for system initialization data preparation. In addition, because the traditional asset management system itself can not accurately locate assets, the asset tag chip combined with BIM and RFID can also make the location and related parameter information of assets in the building clear at a glance and quickly query. 5. Space management Space management is the management of building space by the owner in order to save space costs, effectively use space and provide a good working and living environment for the end users. BIM can not only be used to effectively manage resources such as building facilities and assets, but also help the management team to record the use of space, handle the requests of end users for space changes, analyze the use of existing space, rationally allocate building space and ensure the maximum utilization of space resources. 6. Building system analysis Building system analysis is a process of measuring building performance according to the owner's use requirements and design regulations, including how mechanical systems operate and building energy consumption analysis, internal and external airflow simulation, lighting analysis, and people flow analysis. BIM combined with professional building system analysis software avoids repeated modeling and system parameter collection. BIM can be used to verify whether the building is built according to specific design regulations and sustainable standards. Through these analysis and simulation, we can finally determine and modify the system parameters and even the system transformation scheme to improve the performance of the whole building. 7. Disaster emergency simulation Using BIM and corresponding disaster analysis and simulation software, the process of disaster can be simulated before the disaster occurs, the causes of the disaster can be analyzed, disaster avoidance measures can be formulated, and emergency plans for evacuation and rescue support can be formulated after the disaster occurs. When a disaster occurs, BIM model can provide complete information of emergency points of rescuers, which will effectively improve emergency response measures. In addition, the building automation system can obtain the status information of buildings and equipment in time. Through the combination of BIM and building automation system, BIM model can clearly show the emergency position inside the building, even the most suitable route to the emergency point, so that rescuers can make correct on-site disposal and improve the effectiveness of emergency actions. That is "Introduction to Parametric Design of Revit". Have you learned more about parameterization after reading the above introduction and answers? Pay attention to learn more about the graphic tutorial "Article".