Test Research Of Longhua Super Bridge Above Songhua River In Songyuan

In this paper,Longhua super bridge was investgated from construction test and final test.The construction test consist of concrete strength test and C50 concrete elastic modulus test and stress monitoring of test section in the course of constructionIn this paper, final test is load test of bridge.Load test of bridge is a mean that can verify the bridge structure design theory.By exerting load on bridge ,test data can be got, and Bridge structure' s safety can be valuated. Bridge load test can accumulate practical datum especially for the new structure, the new design theory and development and the application of the new construction craft.The test of the semi-rigid frame prestressed concrete box girder is researched,which is supporteded by the subject "long-span prestressed concrete box beam structure of the thin-walled study" in bureau of Jilin Province .The research is based on the test on the Longhua super bridge above Songhua River in Songyuan, the bridge structure design theory, the finite element method, the the theoretical basis in vibration testing and Analysis.Through the theoretical analysis of Longhua super bridge by Dr.Bridge software,and the reasonable control load and load condition were made sure.Theory calculated value was compared with test data,and load carrying capacity of the bridge can be made sure.By test,we will know more about prestressed concrete semi-rigid frame continuous box girder bridge.In this paper, the old norm's vehicle load and the new norm's lane load is imposed in the most disadvantaged loading position of the affected line of the control section and the internal force are compared. The results show that internal force in the new norms is more than the old norm.The finite element model of the bridge is established by ANSYS software and the fundamental frequency and the corresponding vibration mode is drawed by Modal Analysis. The dynamic performance is determined by the dynamic test of the vehicle's racing, jumping off, braking, and so on, analyze and determine the dynamic performances of the songyuan longhua songhua river bridge. The testing results and the theoretical calculation indicate that this bridge has a good dynamic performance.