Design And Development Of The Information Visualization Platform Based On BIM For Bridges Health Monitoring

In recent years,the phenomenon of large-scale and intricate bridges become obvious as China's bridge industry boosts.Moreover,there are different degrees of diseases and damages of bridges as theri service life prolongs.To ensure operational safety of bridge structures,more and more bridges have been installed with structural health monitoring and evaluating system.However,today's bridge health monitoring system displays monitoring data based on two-dimensional graphics interface,which lacks visualization compared with three-dimensional graphics,besides,it requires maintenance workers to possess some relevant professional knowledge.Therefore,this thesis combines bridge health monitoring with three-dimensional information display technology,designs and develops a visual platform for bridge health monitoring information based on BIM.First,the visual platform takes Visual Studio 2017 and SQL Server 2008 as the major development environment,and adopts B\S network structure,second,it accomplishes the data storage,query,data processing and other in the platform with C # language and SQL language.Third,the front page design of the visual platform is accomplished by using HTML5 and JavaScript language,and the adaptive display of the visual platform on PC and mobile is fulfilled by applying BootStrap framework.The visual platform is based on the health monitoring project of Guanting Reservoir grand bridge on Beijing-Zhangjiakou high-speed expressway passing from Huailai to Xuanhua.It is partitioned into three parts in accordance with function domains,namely,background configuration module,foreground display module and three-dimensional BIM display module.The background configuration module achieves users' remote editing of monitoring,such as contents,points,devices and relevant information in database project.The foreground display module exhibits monitoring data stored in database by horizontal and vertical comparison,thus,users are able to analyze the bridge health according to the comparison of monitoring data,and it can send the alarm information to the bridge operators without delay when the monitoring data obtained by the senor exceeds limit.The three-dimensional BIM display module utilizes the secondary development function of Revit software,and export and load three-dimensional model which contains the structure of bridge health monitoring information in the front page,and then display the three-dimensional model on the platform with WebGL technology.The practical application of BIM technology in health monitoring exerts positive effects on improving the level of bridge health monitoring and monitoring the efficiency of data usage,thus making it easier to manage the bridge maintenance workers and enter the working field of monitoring data usage.