BIM-based Rebar Modeling for Variable Section L-shaped Columns

Building Information Modeling (BIM), as a kind of digital means applied in the process of building design, construction and management, has been widely used in all aspects of construction engineering. However, the application of BIM in the field of steel reinforcement engineering, due to the wide variety of rebar and complex shapes in the plan construction drawings, the rebar modeling is inefficient and prone to errors, and the traditional plug-in for standard column models is usually difficult to cope with the demand for modeling rebar of complex components such as variable cross-section shaped columns. Therefore, with the help of the program and algorithms to create a BIM model of rebar can reduce the occurrence of the above problems. This paper mainly uses Revit secondary development technology, with the help of C# programming language to develop a program for automatic generation of reinforcing steel BIM model for variable section L-shaped columns. The program combines the structural requirements of reinforcement in the building code and standard drawings, identifies the key nodes of the shaped column model, calculates the coordinate points of the reinforcement, and carries out targeted algorithmic processing for the arrangement of reinforcement in the complex variable cross-section area of the upper and lower columns to complete the creation of the BIM model of reinforcement in the shaped column. The development of this program provides a variety of efficient ideas for the creation of complex structural reinforcement for other shaped columns, which helps to save the time of designers to create BIM models, ensures the geometric accuracy of the reinforcement model, and helps to promote the informatization and intelligentization of the construction of reinforced concrete structures.