Aiming at the bearing dynamic response problem of curved steel-concrete composite continuous girder bridge under vehi-cle dynamic load,the refined finite element model of the bridge considering the lateral superelevation and longitudinal elevation change of the bridge deck and the multi-rigid-body real vehicle model based on the actual heavy-duty vehicle were constructed respectively.The Fiala tire based on the elastic foundation beam theory was used to simulate the tire-road contact relationship.The vehicle-curved bridge dynamic coupling model was established.The influence of vehicle speed,eccentric load and pavement irregularity on the bearing response were explored.The results show that the radial reaction force and vertical reaction force are larger when the vehicle is driving near the bearing,and the tangential reaction force is larger when the vehicle is driving in the middle of the span.The maximum values of the three bearing reaction forces increase with the increase of the vehicle speed,which has a great influence on the radial reaction force and tangential reaction force.The influence on the vertical reaction force is reflected in the decrease of the inner bearing reaction force and the increase of the outer bearing reaction force.The dynamic reaction force of the three bearings increases with the increase of road surface irregularity.The road surface irregularity excitation has a great influence on the radial reaction force and vertical reaction force,and has little influence on the tangential reaction force.The driving eccentric load has little influence on the radial and tangential reaction forces,but has a great influence on the distribution of the vertical reaction force.
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