Research And Application Of BIM-based Parametric Modeling Method For Special-shaped Buildings

With the advent of socio-economic development and the advent of the information age,more and more special-shaped buildings have appeared,manifested in irregular shapes,and often have zigzag or streamline characteristics.As a result,a large number of non-standard buildings and structural components have appeared in the building itself.The modeling process is complex and inefficient,so BIM parameterization techniques are increasingly used in the design and construction of shaped buildings.However,the current parametric technology is mostly used in the early conceptual design stage of special-shaped buildings.In the later stage of BIM model establishment,traditional methods are still used for modeling.The process of modeling the huge amount of information attached to special-shaped building components is time-consuming and labor-intensive.In order to efficiently build and manage model in formation,this article selects Revit as the modeling software,uses the visual programming plug-in Dynamo as the main development tool,and combines Python and Design Scrip languages to study the parametric generation of special-shaped building surfaces and data information mana gement and application.jobs:Firstly,the method of parameterized generation of special-shaped surface based on Dynamo is researched.Starting from the characteristics of special-shaped building surfaces,the modelling logic and rules of typical special-shaped building cases at home and abroad are sorted out.Grid division develops adaptive node packages,and uses Dynamo program to drive Revit to quickly generate surface models.Secondly,it analyzes the data transmission and processing requirements of special-shaped building components,and builds a model information management system based on Dynamo-Revit.It is divided into three parts: "base database-data operation platform-data output platform".For low-level problems,based on Dynamo and the Python language,a corresponding program for rapid layout and modification of components was developed,which can quickly process information data and output accurate and reliable data.Finally,the engineering application of parametric modeling was performed.Taking a curtain wall project in Fuzhou as an example,the proposed process framework was used to demonstrate the realization of the parameterized generation of curtain wall surface modeling,component data processing and transmission,and the traditional Revit modeling method.The comparison verifies the feasibility of the surface creation ideas and procedures proposed in this paper,as well as the efficiency and accuracy of its application to actual engineering,and demonstrates the effectiveness of the method.The research results show that the parametric modeling method proposed in this paper can be effectively applied to actual engineering.Based on the Dynamo-Revit platform,the special-shaped surface parameter generation and information data management can greatly improve the modeling efficiency,and can be used for BIM in parametric construction.The application promotion of the mold provides technical support,and at the same time provides reference and reference for future Dynamo applications.