Parametric Modeling And Model Application Of Tunnel Based On BIM Technology

For the past few years,tunnel engineering has developed rapidly in China,which makes the design work increase hugely.However,there is little parametric modeling design method to reduce its workload.As we all know,the implementation of parametric modeling combined with the characteristics of tunnel engineering is the key to improving design efficiency by using BIM technology.Unfortunately,the parameterization ability of the existing modeling methods is not applicable to tunnel engineering modeling.Therefore,it is necessary to carry out research on parameterized modeling based on BIM technology.In view of the inadequacy of the existing modeling method's parameterization ability,this paper analyzes the basic principles of Revit+Dynamo parametric modeling based on the characteristics of tunnel engineering,and proposes the modeling methods of geological model,lining model and supporting member model.Then the difficulties of the parametric model application are studied: the conversion of the Building information model and the structural calculation model and the visual display of the monitoring information.In the end,the research results confirmed the research results.The main work and important conclusions of this paper are as follows:(1)Combining the modeling characteristics of tunnel engineering,the Autodesk platform is selected as the basic modeling platform,and the parametric modeling principle of the main modeling software Revit and the development and use principle of Dynamo are analyzed.The tunnel parameterized modeling aid is written.Programs,including geological model generation programs,skeleton inheritance programs,model generation programs,and component model parameterized layout programs.(2)Based on the analysis of the structural characteristics of tunnel engineering,combined with the parametric modeling principle,the parameterized modeling method of tunnel is proposed,including geological model,lining model,method of creating component support model and method of assigning information required by model.The application of the tunnel Building information model in the actual engineering,compared to the conventional modeling method,and greatly improved the modeling efficiency.(3)I analyze the difficulty of converting the Building information model of tunnel to the structural analysis model,study the conversion method of Building information model and structural analysis model,and use C # language to develop the interface program of Revit and ANSYS,so as to realize the automatic conversion from Building information model to finite element model.This program can be used for reference by other BIM software to automatically conversion into finite element model.(4)On the basis of constructed model,the monitoring information input and visual early warning methods are studied.With Dynamo,a monitoring data visualization program was developed to provide real-time feedback of data and visual status display.The visual status display mode is designed to be green when the monitoring value reaches the allowable range,and turns orange when the warning value is reached,and turns red when the alarm value is reached.(5)Through the practice of engineering cases,the applicability of this study is verified.The practical results show that the efficiency of modeling can be greatly improved by using the parametric modeling method in this paper.The interface program is used to automatically generate the ANSYS finite element model,which saves the time of remodeling in ANSYS.The generated finite element model can better reflect the stress characteristics,and has a good prospect of engineering application.