Research On Construction Monitoring And Information Management Of Continuous Rigid Frame Bridge Based On BIM

With the mature of the bridge structure analysis theory and the application of high strength materials,the bridge construction in China is gradually developing towards a larger span.Continuous rigid frame bridge has become the preferred bridge type of long-span prestressed concrete bridge because of its continuous girder,no expansion joint,no system conversion and great flexural stiffness and torsional stiffness.Prestressed concrete continuous rigid frame bridge generally adopts the construction method of hanging basket cantilever.In the construction process,the requirements for the construction quality and structural safety of the bridge are increasingly high.Therefore,the monitoring and control of the construction process of the bridge is the key to ensure the construction quality and structural safety of the bridge.In recent years,China will regard "smart bridge" as the next development strategic goal in the field of bridge engineering,and the emergence of BIM technology will accelerate the realization of this goal.With the gradual maturity of BIM technology,the bridge construction monitoring based on BIM technology has become one of the directions of bridge engineering application research.In this paper,Shibaochuanhe Bridge is taken as the engineering example background,and BIM technology is applied to the construction monitoring of continuous rigid frame bridge.Through the combination of structural theoretical calculation and field actual monitoring results,the information and visualization of bridge construction monitoring are realized.This paper mainly carries out the following research contents:(1)This paper introduces the research background and significance of this paper,and summarizes the application and research status of BIM technology in bridge engineering at home and abroad.It is of great significance to apply BIM technology in bridge construction monitoring.(2)The definition and characteristics of BIM as well as the concept and method of construction control of continuous rigid frame bridge are deeply analyzed.This paper presents the main construction monitoring scheme of the main bridge of Shibaochuanhe Bridge,and describes in detail the importance of linear control,stress control and stability control in construction monitoring.Combined with the basic application of BIM technology in bridge engineering,the application of BIM technology in construction monitoring of continuous rigid frame bridge is expounded.(3)Focused on the basic content,extensibility and Revit API application program interface.Aiming at the secondary development technology of Revit software,this paper introduces the development environment,development mode and development process needed for the secondary development.(4)Based on BIM technology theory,combined with Revit secondary development technology,Visual Studio 2019 integrated development environment and C# programming language,Revit fast bridge modeling plug-in was developed.The plug-in can directly read the Excel spreadsheet data,and create the main girder model of the long-span continuous rigid frame bridge by driving the standard box girder parameterized.The feasibility of the plug-in is verified by the application of the plug-in in Shibaochuan River Bridge,and the modeling efficiency is greatly improved.Write formula in the Excel spreadsheet,prestressed reinforced the coordinates of point,with a space curve by visual programming plug-in chateau marmont as the carrier,using prestressed Python Script Script language program,according to the coordinates of points,program automatically created space curve model line,through the Revit lofting command for the creation of the prestressed reinforcement.The problem of not directly creating the spatial curve prestressed reinforcement model in Revit software is solved.(5)The model conversion method between Revit software and ANSYS finite element software was studied.By using c # language and Revit secondary development technology,extraction and prestressed girder model in Revit software model,the coordinates of points and the points through the code into the coordinates of APDL command stream format,ANSYS by reading this command flow to achieve the main girder BIM model and prestressed conversion between BIM model with ANSYS model.By transforming BIM model into ANSYS model,the simulation analysis of main girder cantilever construction stage is carried out,and its linear shape and stress are calculated,which provides theoretical data support for construction monitoring,and realizes the integration research of BIM software and finite element software.(6)Using C# language and Revit secondary development technology,a bridge monitoring information management plug-in was developed based on Revit software platform.By simulating the process of bridge construction stage,the functions of data input,modification and early warning analysis are realized in the BIM model.By applying the plug-in to the construction monitoring of the main bridge of Shibaochuan River Bridge,the stress and linear monitoring data of the main girder can be managed more efficiently.In this plug-in,the measured and theoretical values of girder alignment and stress are compared by selecting the pier number and construction procedure.When the error value exceeds the allowable range,the 3D model in Revit software will give an early warning,so as to provide technical guidance for the next construction stage.