| BIM technology,which is based on the three-dimensional model,has the function of information storage,transmission and sharing of bridge project.However,in the construction process of assembled box arch bridge,it is less used in combination with finite element software,so BIM technology cannot play a better role in the arch bridge construction phase.In view of this problem,based on the basic theory of BIM technology and its core software Autodesk Revit,combined with the finite element software such as Midas/Civil and ANSYS,this paper analyzes the load conditions of the Helong section of linear deviation prefabricated arch box after single ribbing by using a reinforced concrete box arch bridge as the engineering background.And this paper proposed the relevant treatment method combined with BIM technology;Created a model conversion interface between BIM technology and ANSYS software,summed up the influence of sunshine temperature and prefabricated component installation on arch box assembly construction,and proposed some suggestions about the relevant arch box construction process.The main points of this paper are as follows:(1)Conducting a research on the current status of BIM technology and box arch bridge construction technology.Firstly,it surveyed the development of BIM technology at home and abroad and the construction technology status of reinforced concrete box arch bridge.It is proposed that the modeling process of arch bridge at this stage is complicated,the change speed is slow,and it is difficult to control arch axis shape and assembly quality in prefabricated arch box during assembly and construction.Secondly,it sorts out the application of BIM technology in the current bridge and the related problems with the finite element,and finally established the research route:developing the BIM model and finite element software interface program,quickly establishing the finite element model,analysing the linear deviation of the precast arch,and assembling the components of construction technology.(2)Establishing relevant models according to the engineering background and develop interface programs for BIM and finite element software.Establishing the overall structural model of the reinforced concrete arch bridge with Autodesk Revit software.Using Revit API interface technology and C# programming language for secondary development,the Revit structural model is divided into geometric shapes suitable for ANSYS structural analysis.It is possible to directly convert the memberswithout curvature such as webs and diaphragms in the Revit arch bridge model to generate the APDL command stream,and the modeling efficiency is improved.(3)Analysing the linear deviation arch box and the prefabricated arch box assembly members.Firstly,analyze the linear deviation of the prefabricated arch box of the bridge.It is considered that the arch design and the span ratio are the most reliable when the arch concrete is not poured and the arch precast is not considered.Secondly,using Revi2018 to quickly establish the ANSYS finite element analysis model,the sunshine temperature and installation static analysis of the prefabricated arch box components are combined to find the cause of the crack.Finally,the relevant construction suggestions are put forward in combination with BIM technology.It is believed that the use of BIM technology for prefabrication control and management of arch boxes can improve the quality and efficiency of precast construction of arch boxes.The purpose of this thesis is to combine BIM technology with finite element software.Based on the construction status of a prefabricated arch box in mountain area,this paper is aimed to provide effective software and technical support for on-site construction,and to speed up the information transmission and project construction speed of each participant.It has directive significance for no-site Construction and it's a reference for similar bridge construction. |
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