Bridge Structural Health Monitoring And Management System Based On GIS Techniques

If the 20th century was the climax of the bridge increased,21st century will be the century of large span bridge construction. In China, there are five cross-sea projects from Tongjiang to Sanya in the national main trunk line:Bohai Bay cross-sea project, Yangtze River estuary cross-sea project, Hangzhou Bay cross-sea Bridge project, Lingdingyang Bay of the Pearl River estuary cross-sea project and Qiongzhou Channel cross-sea project.Using modern technology and new materials, long-span bridges will be longer, larger, more flexible. With the growing attention to those important bridges on safety, comfort, durability and monitoring to ensure their safety has become a hot topic in research field. More and more people wade into bridge health monitoring and system development. When those bridges have been put to use, automatically monitor and manage systems will ensure the safety and normal operation. Once in the event of failure or damage, the system will report the site of damage, the damage degree, and the conservation strategy.Bridge health monitoring and management systems are rapid develop on the basis of increasingly mature of monitoring technology. At home and abroad they have launched their own application products. Tongji University alone has developed two systems to apply in practice. However, due to our late start bridge monitoring and management system, management experience and a relatively small bridge information to assess the theoretical development of a single, system functionality and expert evaluation criteria have stayed at the initial stage, the level of the bridge monitoring and management is still not a good solution to the class bridge management needs and technical state assessment. Therefore, scientific, standardized and highly efficient management system for construction of bridge health monitoring is particularly urgent.Based on the analysis of the large-scale construction of bridge structural health monitoring system, design the table structure of a tied arch bridge involved in the main message. Study modern Geographic Information Science Theory (GIS), and the GIS' advantages in the development of bridge health monitoring system. There are necessity and natural advantages using GIS when we develop bridge health monitoring and management system. Analysis the Oracle Spatial, which is Object-oriented database, espatially the core technologies in Spatial, and I successfully applied it to the construction of the system.On the basis of syndicated MapInfo's control MapX and Oracle Spatial's powerful unified storage capability of spatial information and attribute information, Use of object-oriented development of ideas, research and development of the bridge health monitoring and management information system, which has the abilities of storage, management, analysis and visualization on bridge geo-information and attribute data. Realize the query of the distance from one point to another, the area of one section, and the material of structure. Using OpenGL's three-dimensional plug-in technology, I establishment the solid model of the bridge. Depend on the real-time information of the bridge monitoring system, use reliability assessment method to assess the bridge active state. The system establish the interfaces with LabVIEW(data acquisition software), MATLAB(data processing software) and ANSYS(structural analysis software), so that we are able to transfer, process and analysis data for structural damage identification, diagnosis, warning, in order to the purposes of monitoring and management the bridge.