Bridge Reaction And Evaluation Based On The Experiment That The Vehicle Is Moving At The Uniform Velocity

With the rapid development of the communication, on the highway and urban road, the load of the automobile vehicle and speed of operation are being improved constantly, meanwhile, the structure of the bridge is becoming lighter and thinner and longer gradually with the use of the high-strength material, the work weight loaded by the structure of the bridge is increased, and the proportion that the dead weight occupies the whole weight is decreased. So, the dynamic function question which the vehicle loads impact the bridge is paid close attention more and more by project field.It is a very important subject for research in the railway bridge and highway bridge that the vehicle-bridge coupling vibration problem under the impact of moving load, over the past 100 years, for the question of moving load, people have already done a large amount of work. But when considering the quality of moving load influences, systematic sport equation will turn differential equation group into when mutual coupling, and can only solved by the number value method , brings very great difficulty for solving and studying of the problem. Moving vehicle model and bridge model are carried on a lot of simplicities in the existing research, for solving the problem easily, gradual total mark law precision is not very high is adopted to go on number value for the system differential equation group, but on realizing the real procedure, it still takes a long time to solve the question, it is unfavorable for real scientific research and project application.The difficulty analyzing the vehicle-bridge coupling of vibration lies in finding one method which can deal with vehicle-bridge coupling vibration. So at first it is expounded that the research overview of the survey for bridge-vehicle vibration problem, and is introduced that the several typical theories calculating the vehicle-bridge coupling vibration, furthermore, it is put forward that one simulation bridge - vehicle interactive analysis model in this paper, i.e. it is the model that the vehicle is simulated 7 degrees of freedom including centroid the vertical displacement, in front and at the back of rotate as side direction rotating, and each there is one vertical to the degree of freedom each wheel, have popularized one dose of models of arranging of quiet strength of nonlinearity of the bridge, set up the whole movement equation of coupling vibration of the vehicle-bridge, neglects the influence of non-smooth-going of road surface .Then a dynamic analysis model of KongWan bridge is established by means of the ANSYS general grogram. it is analyzed and studied that the bridge reaction based on the experiment that the vehicle goes with the uniform velocity, The shake frequency of KongWan Bridge is calculated by the ANSYS software, and moving deflection is calculated too and compared with the result of the test, a large number of figures value result are provided, it is useful to understand and realize the complication course of the vehicle-bridge vibration.