Abstract：Abstract：Research purposes：Combined with the practical design of heavy haul railway and the curve design of the railway bridge under the condition of heavy axle load in recent years,the dynamic responses of railway with the radius of 800 meters of the railway bridge which was sustained 30 t axle load of the heavy-haul train were generated in this paper using a multi-layer finite element model includes the rail, sleeper, ballast bed and bridge. The effect of 30 t axle load of freight train on dynamic response of curve bridge is analyzed.It makes a reference for the design of heavy haul railway.
Research conclusions：(1)The dynamic indexes caused by 30 t axle load meet the relevant specifications of railway on curve bridge with the radius of 800 m, the design of bridge and the railway line is reasonable. (2)The dynamic responses caused by centrifugal force and axle load have an impact on the adjacent bridge span with a train passing through the curve section. (3)The number of train marshaling has no effect on the peak value of dynamic response, but it affects the duration of the structure dynamic responses when it exceeds 4. (4)The research results have reference significances in curve designing of heavy haul railway on bridge.
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