Bridge Health Evaluation Based On GIS

Now it's a hot research on the health and safety evaluation of bridges.With many new technologies developing fast,such as computer and 3S(GPS,GIS,RS),it's more meaning realistically to use these new technologies and methods in civil engineering.In this paper, to beginning with the works of "the bridge health evaluation system of GIS-applied" in the task team,some bridges in a certain area as a example,a procedure of health judging by the provided method from actual maintaining criterion evaluate the state of technique on every bridge,showing the results on the map.So the government of bridge management could convenient inquire and analyze these results.In the beginning,it is summarized that the status quo of bridge using and the researches on bridge health evaluating method and GIS in the whole world,the meaning and the contents of the work in this paper is introduced.Then the method,the tools and the functions which are based on the GIS in designing Bridge health evaluation is analyzed, bringing forward the structures of data in this system.Taking some bridges in a certain area as an example,the procedure code of modules is designed,which is to link the geography information and property data,making all types of information visualized and labeling the data on the map in the style of statistics chart realized by the function of theme particular to GIS.So it is directly and vivid to analyze and use the data.According to the demand of software engineering,the paper takes the bridge health evaluating method in the application to GIS for a example,introducing that the application software for Visual Basic is regarded as platform,adopting that the exploitation mode based on OLE-automatization is that the command is executed by sending the instruction of map basic or mapinfo from the application software of Visual Basic to mapinfo,making use of the data-base of access to memory the bridges inspection data.In this paper,it is introduced about the platform of the GIS software,such as MapInfo Professional and mapx. And this paper explains in detail the idea of designing the software system,the structure of the bridge health evaluating system based on GIS,the flow of procedure,the assignment of all functions and the design of the data frame.It is important to program the GIS module, the module of bridge information and inspection data and bridge evaluating module.At last, the bridge health evaluation based on GIS is tested in order to examine the correctness.