Research on Train-rail-bridge Coupling Vibration of Jieyang-Huilai Railway(72+72)-m Groove Box Composite Girder Bridge
In order to study the influence of additional deformation caused by temperature on the running performance of trains on the bridge,based on train-rail-bridge coupling vibration analysis method,the dynamic response of the(72+72)-m groove box composite continuous girder bridge and the trains on the bridge under additional deformation of temperature is analyzed.The influence law of structural deformation during the operation stage of the bridge on the track smoothness,the safety and comfort of trains on the bridge is verified.The results show that the vertical dynamic response of the main beam increases slightly when the additional deformation of temperature is considered,in which the mid-span vertical displacement of the main beam is greatly affected by the temperature additional deformation.The dynamic response of the train on the bridge increases with the increase of the train speed.The influence of the train speed on the dynamic response of train is amplified when the temperature additional deformation is considered.Compared with the CRH6F EMU multiple unit,the dynamic response of the bridge is not obvious with the change of train speed during the running of C70 truck,especially the displacement of the bridge,but the vehicle dynamic response is more sensitive to the train speed.
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