Research On Integration And Visualization Of Bridge Construction Monitoring Data Based On IFC

Bridge construction monitoring assumes the role of ensuring the safety of the bridge structure and controlling the alignment and internal force status of the structure.However,the informatization level of traditional bridge construction monitoring is insufficient,the integration,exchange and sharing of data are difficult,and the visualization means are single It brings a lot of inconvenience to the on-site construction control.With the maturity of BIM(Building Information Modelling)Technology,the deepening application of BIM in bridge construction phase will help to improve the informatization level of bridge construction and fine management,which has become one of the research hotspots in academic and engineering circles in recent years.Focusing on the two cores of integration of bridge construction monitoring data and BIM model-based monitoring data visualization,taking Fangting River Bridge in Xuzhou as an example,this paper studies the data integration of prestressed concrete continuous girder bridge construction monitoring based on IFC(Industry Foundation Classes)Standard and the visualization of beam stress and alignment monitoring data,mainly including the following contents:(1)The information expansion mechanism of IfcSensor entity and IfcBeam entity based on attribute set is proposed for IFC integration of beam stress and alignment monitoring data;according to the integration requirements of bridge construction monitoring data,the attribute set of sensor and alignment attribute set of beam are customized,and the expansion of IFC entity attribute set is realized by using xBIM parsing tool,and then the extension integration program of attribute set and IfcPropertyTableValue property assignment program are developed to realize the expression of bridge construction monitoring information based on IFC model,and the effectiveness of the program is verified by BIM vision V2.22 software.(2)Based on the basic idea and core characteristics of BIM,a parameterized model of beam is constructed.The model can realize parameterized control through the reference plane which constrained by size parameters positioning section control points,which can meet the requirements of visualization of stress and beam alignment.Dynamo visual programming is used to realize the interaction between the geometric dimension of the model and Excel data,so as to achieve the purpose of intuitively displaying the construction alignment of beams in the BIM model.The general situation of Revit API and the basic process of secondary development are described.The beam stress visualization function based on the AVF(Analysis Visualisation Framework)is developed by using C# language and Microsoft Visual Studio 2017 as the development platform.The visualization effect of directly expressing the stress error state of different measuring points in different colors on BIM model is realized.(3)In order to meet the needs of information management and visualization of prestressed concrete continuous girder bridge construction monitoring,the development framework of bridge construction monitoring BIM management system is defined,and the function menu of Revit software is expanded;three database solutions are compared and analyzed,and the Extensible Storage is determined as the database to conduct architecture design;the monitoring data integration module and monitoring data visualization module are developed,and UI interfaces are designed.A bridge construction monitoring BIM management system with integrated functions of data storage,extraction,analysis and visualization has been formed.The system has been successfully used in the construction monitoring of Fangting River Bridge,and its effectiveness and practicality have been verified.