Safety estimation of railway concrete bridge under moving train

摘要

In this paper, regarding the train and bridge as a system, a dynamic analysis model of the train-bridge interaction system under moving train is presented. The method can be applied to analyze the dynamic response of bridges. The static deflections, dynamic deflections, vertical and transversal accelerations, vertical and transversal amplitudes of a 30 years old bridge subjected to trainloads were measured. The comparisons between the criterion value and test data are given. The safety quality of the old bridge under static trainloads and moving train is estimated.