Beijing-kowloon Line, Jiujiang Yangtze Bridge Operational Performance Test Study

In view of the complexity of the vehicle/track/bridge coupling system itself, the difference of actual bridge and the calculation mode, the con-struction quality of the bridge and the aging of component and other fact-ors, it has some difficulties to give an accurate evaluation on the operati- on performances of railway bridges with pure theory. Therefore, The mor-e direct approach is to take on the vehicle,track and bridge dynamic test, so as to evaluate the overall testing system performance.This paper presents the vehicle/bridge dynamic experimental research of Jiujiang Changjiang River bridge, and completed the following major aspects:1) Summerized the research on vehicle/bridge dynamic system analysis, and presented that the railway bridge dynamic experiment is important to estimate the operating performance of the whole bridge.2) Brifely introduced the structure form of Jiujiang Changjiang River bridge, and showed the status of operational phrase, especially the train shaking problem due to speeding up of the train.3) According to the status of operational phrase, the way of using vehicle/bridge dynamic experiment to estimate the operating function of vehicle, bridge, and track is put forward.4) By statistical analysis of the experiment results, find out the inter-action between the different train type, track and bridge structure.5) By analysis of the interaction of the test train-track-bridge dynam-ic response, finally find out that train shaking is the most important factor that influences the speed up of bridge, and suggest the solution.