Research on a Distributive Network System for the Safety Monitoring of Bridge StructureZHANG Song(Key Laboratory of Fiber Optic Sensing Technology and Information Processing of Ministry of Education,Wuhan University of Technology,Wuhan 430070,China)The paper proposed the framework of distributive network system for structure monitoring and health analyzing,which based on expert systems as the main diagnosing resort,was composed of a tripe stage hierarchic structure and could be used for system state monitoring and health evaluating of the main structure of bridge and may serve as the important technical guarantor that change the planned overhaul to premonitory repair for bridges.The monitoring systems had withstood ordeal for more than one year proved that their durability and stability satisfied the need of health monitoring for bridge,and information could be provided for structural health diagnosis.optical fiber sensor;bowstring;health status