Research On The Application Of Highway Bridge Steel Weld Inspection Technology

With the development of urban construction and the progress of steel bridge design andconstruction technology, steel bridges use more widely. So we have to pay attention tosecurity issues and the quality of bridge inspection work, weld quality inspection is necessaryto control the content of welding quality and weld defect detection is also essential content ofwelding inspection. At present, steel connection is the main form of welding at home andabroad, so weld quality directly related to the structure of safety and usability. Weldingquality will largely determine the construction and use of safety steel construction and couldendanger human quality, it is important to detect weld detection and evaluate it. In spite ofvisual weld surface defection and forming defection, find internal defects in non-destructivetesting of welds usually. In order to keep this trend of develoment, the paper carried out thefollowing studies:1.In order to comprehensive and systematic review of the development of China’s steelconstruction and steel bridge nondestructive testing technology, further analysis by usingnon-destructive testing technology in steel bridge weld detection;2.Introducing the common causes of defects and their major impact in the quality ofwelding seam, we can identify the hazard cracks effectively, analyze and summarize theeffects of weld defects on the structural strength and bearing capacity, so ensure the safety ofthe structure;3.Introducing the steel bridge steel welds NDT site construction technology andapplications commonly used methods, focusing on details of ultrasonic testing and magneticparticle testing，that the two most of common means of detection. A more detailed summaryof the characteristics of each principle and construction technology testing, comparativinganalysis of the various non-destructive testing methods and summing up the advantages anddisadvantages of various detection methods.4.Introduce the development of fuzzy comprehensive evaluation and theoretical system, to explore and demonstrate the feasibility of fuzzy comprehensive evaluation of welddefects and comprehensive summary of the fuzzy comprehensive evaluation method andprocedure of weld defects. Combined with practical engineering analysis, the use of fuzzycomprehensive evaluation to conduct a comprehensive assessment of weld defect level, takingmultiple factors into considersion. Conducted a more reasonable level of division, using themodel operator and the weighted average method to deal with the accuracy and feasibility ofindicators. Fuzzy comprehensive evaluation applied to assess levels of weld defects have agood direction meaning. can be avoided with a greater level of undetected error detectiondefect detection,which is related to the feasibility of the project and provide higher accuracyin the future.