Research And Development On Coordination Platform System Of Medium And Small Span Steel Bridge Based On BIM

BIM(Building Information Modeling)technology is a digital expression model based on 3D modeling technology that integrates various engineering information and functional characteristics.Although BIM has been involved and applied in many engineering projects in China,there are few related technologies for applying BIM to the industrial design and manufacture of steel bridges in the field of bridges.Therefore,based on the structural form of steel structure bridge and its manufacturing characteristics,this thesis uses BIM technology and CATIA software to realize the parametric modeling of steel structure bridge;in the industrial production stage of steel bridge,the steel bridge manufacturing execution system is developed,and the genetic algorithm was used to develop the optimal scheduling program.In the aspect of information integration,an internal consistent and achievable information model was designed to ensure the real-time and consistent bidirectional association of information,shortening the bridge engineering design and manufacturing cycle,improving the project.Completing quality and reducing costs.The main work of this thesis is as follows:(1)Based on the CATIA platform,the research on parameterized modeling method of steel box girder segment is carried out.Taking the standard section section parameters as the research object,based on the “skeleton + template” modeling idea,the section standard is created by the Catalog,the model library is created by the CATIA secondary development technology,and then the “template” assemblyis formed by the skeleton with the positioning information.The three-tier architecture of the system was built using the C# development language for implementing the parametric design method from the program level.(2)Analyze the problems existing in the production management process of steel bridge manufacturing enterprises and the demand of enterprises for the system.Use business process and use case diagram to analyze the requirements from the perspective of steel bridge MES system,and outline the functional structure of steel bridge MES system.The detailed design and key technology of the manufacturing process module and production scheduling module were carried out,and the E-R diagram and data base table of the system were designed,which laid the foundation for the development and design of the subsequent system.(3)Aiming at the optimal scheduling function of the production scheduling module,the mathematical model of the shop scheduling in accordance with the steel bridge manufacturing enterprise is established.The scheduling model is solved based on the genetic algorithm.The implementation method of each design operator in the algorithm is studied,and the method is verified by an example.The effectiveness of the steel bridge MES system integrated scheduling method provides technical support.(4)Follow the relevant design principles,comprehensive use of.NET,CATIA API,database and XML technologies,using shared,object-oriented engineering models as the basis for the integration of design information and manufacturing information,to build the core ofdata structure and the overall architecture of the softwarefor the small and medium span steel bridge collaborative platform,and develop some functional modules of the prototype system.The application of BIM technology promotes the standardization and generalization design of steel bridge components,forms the design and manufacture with the template library as the core,accelerates the development of steel bridge design and manufacturing automation,not only liberating a lot of manpower in the design stage,but also controling the cost,quality and duration of the factory manufacturing.control has important implications.