| As one of the most competitive bridges in the city,self-anchored suspension bridge has a broad development prospect.However,due to its special structure,it is necessary to strengthen the monitoring and maintenance of the bridge in the operation stage.In order to extend the service life of the self-anchored suspension bridge and ensure the safety and reliability in the operation process,the bridge structure was managed throughout its life.Information of all stages of planning,design,construction and operation was integrated,and the practical information was orderly stored and efficiently managed with the help of BIM technology.In order to solve the problem of lifecycle management information interaction between the entity of self-anchored suspension bridge and the virtual BIM model,Digital Twin technology was introduced to build the network service platform,improve the efficiency of information transmission,and realize the lifecycle management system with BIM model as the core and network platform as the link.The appearance and maturity of BIM technology has effectively solved the problem of information storage and calling in bridge engineering.The BIM model was established by Revit software in the engineering background of Yunlongwan Bridge,meeting the requirements of self-anchored suspension bridge’s complex structure and huge amount of information.However,over-refinement in the model would slow down the design process,the model was divided into geometric models and performance information models.According to the different design depth,the level of details was divided.The lightweight of BIM model was realized while satisfying the need of information expression of bridge structure.By means of parameterization,a geometric model was established.Using family parameters and the catalogue of family types,the components family of self-anchored suspension bridge was created.The related component instances were integrated to form nested families,which were spliced into a whole model to reduced the BIM modeling workload.The performance information of the bridge was obtained with the finite element software,by simulating the initial equilibrium state of the self-anchored suspension bridge,the tension and anchorage suspender process and the operation state of the completed bridge.In order to fuse the performance information into the geometric model more conveniently,the safety factor and safety grade were taken as the criteria.Information batched processing with the help of Dynamo visual programming software.Through logical design,using Excel file as transmission medium,reading performance information to create parameters,and assigning parameter values.Furthermore,the safety grade parameters were selected,and the color of different components was characterized,which could express the safety level reserve of structure clearly and intuitively in BIM model.Based on the Digital Twin,the lifecycle management system of bridge was proposed.Building a Web site and a Wechat applet as network service platforms,connected the virtual and the real,and improved the efficiency of information transfer between the self-anchored suspension bridge and the BIM model.Using the Web site managed a large amount of data produced in the whole lifecycle of the bridge,realized the linkage between the Web page and BIM model,remote cooperation and other function.The lifecycle management platform was miniaturized by using Wechat Mini Program,which increased the information interaction rate,maximized the information timeliness,and referenced the lifecycle management of bridges. |
