In The Service Of Prestressed Concrete Continuous Box Girder Bridge Maintenance Decision Systems’ Research

At present, there are still a lot of problems for the safety assessment of the existing prestressed concrete girder bridge. For example, in the object of study, researchers most selection ordinary reinforced concrete bridge as the research object, in the study of existing prestressed concrete girder bridges rarely, also in research in the safety assessment of existing prestressed concrete girder bridge, just simple using a safety assessment method to the bridge were safety assessment, resulting in the inaccurate, resulting in the custody unit is difficult to the bridge to make reasonable dimension raising decision.This paper is mainly reflected in the following aspects:①Disease database of the existing prestressed concrete girder bridge. According to the basic data of the construction unit, the corresponding bridge input basic information database, according to the appearance inspection of the detection unit, special testing, structure calculation, static and dynamic load test and safety assessment level and curing suggestions are entered into the database, let a person can be more intuitive to see the bridge disease data.② The safety assessment program of the continuous prestressed concrete continuous box girder bridge is compiled. This paper, the application of the three kinds of safety assessment method: static loading test safety evaluation method, reliability evaluation method, to standardize the assessment method of compiling program analysis, and database are combined to form the system of management and maintenance, according to the disease of the bridge to determine the relevant parameters, and can quickly on the bridge safety assessment.③The disease of the continuous box girder bridge in service is contrasted, and the trend of the disease is predicted. Analysis which is the new disease, the database was established and according to the data of detecting back, deflection from the cracks in the concrete, girder, steel bar corrosion factors, combined with the modeling analysis, and attempts to predict disease development trend, compared detection in the detection of disease information.④Selected in existing prestressed concrete continuous box girder bridge of Chongqing, disease and suggestions on maintenance and entered into the database; again according to the above three methods of safety evaluation and the bridge of safety assessment, operation interface, assessment of the bridge are obtained.