Abstract：The high bridge occupation ratio, the large train operating density and the wide distribution range of the seismic zone make the high-speed railway bridges in China suffer huge potential earthquake threats. At present, the relevant regulations on the safety of high-speed railway bridges and running safety on the bridges under earthquake are not detailed or specific enough. Safety prevention and controlling under earthquake fail to take trains, tracks and bridges as a large system for safety fortification. It is urgent to carry out systematic research to ensure the safety of high-speed railway bridge structures and running safety on the bridges under earthquake. Aiming at the structural characteristics of the high-speed railway track-bridge system, the research status of the damage characteristics and damage mechanism of high-speed railway track-bridge system under earthquake is introduced firstly. Then,the progress and deficiencies of current researches are stated from the aspects of the deterioration mechanism of the track irregularity on the high-speed railway bridge after earthquake, the dynamic analysis of the train-track-bridge system of the high-speed railway under earthquake, the safety analysis of running safety on the bridges after earthquake and the seismic design method of high-speed railway bridges based on performance. Finally, the problems of multi-state, multi-level, multi-defense line security prevention and control in high-speed railway train-track-bridge system under earthquake that urgently need to be studied systematically are prospected.
