Analysis Of Influence Factors Of Highway Bridges In Situ Static Loading Test

At present, China has built about 600000 various forms of highway bridge, in use process, some bridges due to traffic, load, environmental effect and natural aging, has been unable to meet the current traffic load requirements, need through the load test to determine the bearing capacity and performance (especially for raw material all of the existing bridge), and thus determine the limit load solutions or renovation program for reinforcement. At the same time, load test can test the new design and construction quality of large-scale bridge structures, and provide a reliable basis for the finishing quality identification.However, due to the lack of theoretical analysis of technical data, the influence of various factors, test equipment performance, hypothesis testing the quality of personnel and the test environment, the current actual bridge load test are often not satisfied with the result.At present, our country related highway bridge current mainly "rules for the detection and evaluation of load bearing capacity of highway bridge bearing capacity detection evaluation standard" (JTG/T J21-2011) and "method of long span concrete bridge load test (1982 Edition)", the former of static load test is introduced too general, the latter due to release an earlier time has not updated version, also cannot meet the needs of the current load test. According to the development trend of highway bridge construction, the application will be more extensive static load test of highway bridge, the relevant norms of the system remains to improve. By the Chang’an University editor of the "highway bridge load test procedures" also in for advice stage.This thesis aims at the whole process of static load test of highway bridge is analyzed, the three stage combination of bridge structure static load test, namely the preparation stage, the stage of experiment and observation and test result analysis and summary of each stage, to determine the factors affecting the test results, and further analysis of influence scope of all kinds of factors, summed up the main influence factors of type the different structure of bridge static load test, static load test for the future to provide the necessary experience and theoretical complement.