Vehicle-Bridge Coupling Vibration Study of Railroad Long-Span Steel Truss Arch Bridge
To study the dynamic response of the vehicle-bridge coupling system of railroad large-span steel truss arch bridge,the dynamic load test of the bridge is carried out to test the self-vibration characteristics,dy-namic displacement and acceleration of the bridge with the Yongjiang Special Bridge as the engineering back-ground.The finite element software ABAQUS and multi-body dynamics software SIMPACK are used for jointly simulating the vehicle-bridge coupling vibration model to study the dynamic response of the bridge and the train under the action of different speeds and single and double line traffic.Results show that the dynamic re-sponse of both the train and the bridge increases as the speed increases.In addition,the vertical displacement and acceleration of the bridge under two-lane traffic are larger than those under single-lane traffic,and the trans-verse displacement and acceleration are affected by the vehicle bias load.The results under two-lane conditions are smaller than those under single-lane conditions.The maximum vertical and lateral displacements in the main span under different working conditions are 17.234 mm and 3.762 mm,the maximum vertical and lateral accelera-tions are 0.589 m/s2 and 0.213 m/s2,all of which meet the code requirements in China.The dynamic response of the train is not significantly affected by the single and double line traffic,and the derailment coefficient,axle transverse force,wheel weight reduction rate,car vibration acceleration and Sperling index of the train under dif-ferent working conditions meet the code limits.The overall performance of the bridge is favorable with sufficient transverse and vertical stiffness and the trains running on the bridge have good safety and smoothness.
NETL
NSTL
万方数据
