| With the development of building informatization,the degree of informatization in the field of engineering design in our country is also increasing year by year.With the introduction of BIM Technology,many achievements have been achieved in the design stage of building field in BIM forward three-dimensional design.In contrast,the design informatization of bridge engineering field,which also serves as infrastructure,needs to be developed urgently.In this paper,the basic system of the bridge-beam bridge as the research carrier,with BIM ideas to explore the application of three-dimensional forward design mode.Through investigation and practice,literature research and other methods,the following problems in the current three-dimensional forward design of beam bridges need to be solved urgently: the low matching degree between the universal three-dimensional design software and the bridge discipline leads to the low efficiency and the model accuracy and enforceability can not be guaranteed when the three-dimensional modeling is directly carried out;the information between BIM model and structural design software cannot be communicated,leading to The design process needs to be modeled repeatedly;the design information contained in the three-dimensional forward design is comprehensive and various,and the output of the design results is easy to cause problems such as output confusion and output incompleteness.As the initial end of the construction cycle,the design stage is directly related to the information level of the whole life cycle of the project.In view of the above problems,this paper mainly uses the concept of parametric design to do the following research:(1)Referring to the two-dimensional design rules,following the forward three-dimensional design idea,combining with the difficulties existing in the current three-dimensional design,and comparing in many aspects,the current three-dimensional design software combination with high cost performance and suitable for the design and research of beam bridge is selected,and the flow chart of BIM forward three-dimensional design mode,the research scheme of each step and the required software tools are proposed.(2)Make full use of the three-dimensional design advantages of BIM design software,and combine the visual programming tools to develop the software again,and write the program according to the functional requirements to make up for the disadvantage of the mismatch between the three-dimensional software and the bridge specialty.Realize efficient and fast 3D parametric model design.(3)the first mock exam of the principle of parameterized design method of 3D design,and the interworking method between BIM design software and finite element structural analysis software.The bridge girder system is explored to explore the correlation between two kinds of software models,and finally to realize the interaction of model parameter information,so that the whole design process can be "one mold and multi use".(4)Considering that the BIM forward design mode of this project is still in the testing stage,in order to ensure the practicability of the three-dimensional model,this paper takes the original two-dimensional design data as the source,exports the model positioning information with the help of the visualization program,and compares the deviation with the original data,so as to verify the positioning accuracy of the three-dimensional model.(5)The design process is accompanied by the generation of geometry,data,drawings and other information.At this time,3D design software is the resource base of all design information,but the information contained in it cannot be classified and exported,so it can not be fully utilized.According to the demand,this paper divides the information into three categories: geometry information,data information and 2D drawing information.With the help of visualization program,all kinds of information are sorted out and exported Good information storage lays the foundation for information transmission. |
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