Analysis On The Coupled Vibration Of Vehicle-bridge For Highway Curved Girder Bridge

In recent years,China 's expressway and urban expressway has developed rapidly,more and more urban interchange Ramp bridge,highway bridge was built.When the bridge through the bridge can cause the vibration of the bridge,the bridge structure may have a greater damage effect.And now for the curved beam bridge,bridge coupling research is not wide enough and profound,so this research is necessary.Firstly,the background and purpose of this paper are introduced,including the application of curved beam bridge at home and abroad,the research history of bridge and bridge coupling and the research status of highway curved beam bridge.Secondly,three methods commonly used in axle coupling research are introduced and the similarities and differences of the three methods are analyzed.The results show that the three methods are reliable in calculating the bridge and bridge coupling.Then,the bridge engineering of Chifeng Yingjin Bridge is introduced,and the bridge type is compared,and the superiority of the prefabricated continuous prefabricated curved box girder bridge is clarified.Afterwards,the finite element simulation software MIDAS/Civil was used to simulate the influence of the vehicle through the Chifeng Yingjin Bridge.The relevant time history analysis results are presented in the form of lists and illustrations,and their rationality is briefly described.The static response of the bridge under similar conditions is obtained by using MIDAS/Civil.On top of this,the calculation method of the impact coefficient of the bridge is introduced,and the impact coefficient is obtained by using MIDAS/Civil.The static results are compared with the results of the static analysis and the time history analysis results.It is found that when the speed limit is 50km/h,The existing norms on the impact of the value of the relatively conservative.Finally,the modeling process of ANSYS mobile force model and the realization process of axle coupling simulation are introduced.Combined with ANSYS and MATLAB,the transversal displacement response of the first three spans of the six span continuous curved girder bridge is plotted with the curve of the vehicle speed,and the basic law of the bridge coupling is obtained.Compared with the ANSYS mobile quality model,the accuracy of the results of the moving force model is further verified,and the influence of the vehicle speed on the mid-span deflection is summarized.The results of MIDAS calculation and the results of ANSYS calculation are compared and found,and the error between them is small.