【摘要】 基于多源粘弹性人工边界,利用有限元软件ABAQUS建立了动力荷载作用下的路基-桥梁-车辆整体数值分析模型,分别计算动力荷载作用下车速、土-结构动力相互作用(SSI)因素对车-桥系统的影响规律。结果表明:对车桥系统来说,考虑土-结构相互作用时桥梁结构和车辆的竖向动力响应都较忽略时有显著的增大;桥梁的各参考点的竖向动力响应随着列车速度的增大而增大,但车速对桥梁的动力响应影响要大于土-结构动力相互作用的影响;地震使得车桥系统的动力响应明显的增大,同时地震作用下桥梁的参考点上竖向位移、速度的最大值出现时刻和只有列车荷载作用下出现时刻也不同。更多还原

【Abstract】 Based on the viscous- spring superposition artificial boundaries theory,a finite element model involved into foundation,bridge and train under dynamic loads are built by finite software ABAQUS,the dynamic response laws of the train- bridge system accounting for different train running speeds,soil- structure dynamic interaction effect are calculated respectively under dynamic loads. The results show that vertical dynamic response of bridge and train has a significant increase compared with ignoring SSI; the vertical dynamic response of each reference point in bridge become more and more great with train speed increases,while the influence of train speed to the dynamic response of the bridge is larger than SSI; the dynamic responses of the train- bridge system is increased significantly under seismic loads,and the coming moment of the maximum vertical displacement and velocity of each reference point in bridge considering earthquake is different compared with vehicle loads exclusively.更多还原