The Research On Rapid Modeling Method Of Bridge Based On BIM Technology

In the last few years,BIM technology has been more widely used in Bridge Engineering.However,the construction of the bridge BIM model is mainly based on manual modeling method,which is not only inefficient in modeling,but also difficult to guarantee the quality of the model.In view of this,this paper focuses on the rapid and accurate construction method of bridge BIM model,and develops the following research work:Based on the existing bridge engineering problems of low cooperative efficiency,a lack of sharing mechanism,and drawing changing so often,combined with the advantages of coordination and parameterization in BIM technology,this paper carries out a detailed analysis on the concept,theory and standard of BIM technology and its application research status at home and abroad,and at the same time illustrates the advantages when BIM technology is used in Bridge Engineering.On the current situation of Bridge Engineering project information not being effectively shared,on the basis of "classification and coding standard for building information model" and referring to "classification and coding standard of railway engineering information model",the component of simple supported beam bridge is further divided from modeling angle and this paper gives a classification coding table on bridge BIM components.On comparison and selection of several popular BIM modeling softwares,this paper discusses the advantages and disadvantages of various BIM modeling software,and confirms the application of Revit as the bridge BIM modeling software.According to the characteristics of each component of the bridge,and combining with the Revit software family function,the paper tested the family templates,and found the family template which is suitable for making bridge BIM components.In view of the lack of production standards for bridge BIM components at present,the production process of BIM components is given.The common BIM components of concrete beam bridge are made,and the BIM components resource library is established,which provides reference for the production of other kinds of bridge BIM components.Pointing on the low efficiency and difficulty on ensuring quality of the current bridge BIM model construction,the Dynamo function nodes are studied,and the functional nodes applicable to bridge modeling are developed and summarized.By writing Dynamo node program,the bridge BIM components are placed according to Bridge Engineering data,and a set of modeling process for fast and accurate construction of bridge BIM model is realized,and at the same time,the feasibility of the modeling method in the paper is verified by an example,which provides a reference on the application of BIM technology in the design stage of Bridge Engineering.For the situation of requiring multiple changes on drawings when there are differences on construction and design conditions of bridge engineering,the modification of drawings are quickly completed when use the method of parameterized modeling,which greatly reduces the repeated workload of bridge designers due to the changes of drawings.