Study On The Security Assessment Technology Of The Prestressed Concrete Girder Bridges In Services

In recent years, built a large number of prestressed concrete girder bridges, and their number in our large, medium and long-span bridges are dominant. In the initial defect, the natural environment, increasing traffic flow and vehicle load (or overload), and materials under the action of internal factors, over time, these bridges in the materials, components and structure of the three levels of varying degree of damage, these injuries will inevitably lead to the accumulation of a bridge bearing capacity decreased, performance degradation, and decreased durability, and affect their normal use.For this, carry out in-service pre-stressed concrete Liangqiao An assessment of technical research for all traffic management departments to provide accurate assessment of the conservation of such means to bridge the new security situation, with which to accurately assess the actual performance of the bridge, take the appropriate timing of the different bridge maintenance, this saves the bridge strengthening and maintenance costs, extend the life of the bridge. This has a good promotion prospects.This paper, based on existing research, collect enough in-service inspection of prestressed concrete beam bridge instances and bridge Checking with the existing analysis, detection technology, specifications, proposed and analyzed factors affecting their reliability and internal external factors, the researchers carrying capacity of various factors such as deterioration factor, the effective cross-sectional area, grouting conditions, tendons deviation, intensity and other factors, analysis of these factors on the in-service reliability of prestressed concrete beam bridge impact, identify key factors and general factors, which made for in-service reliability of prestressed concrete beam bridge evaluation system.