中文摘要：

结合宁波北站铁路枢纽东疏解线新建小半径反向曲线桥梁动载试验,阐述列车通过曲线桥梁的耦合振动分析理论,根据实测结果对桥梁结构横向自振频率、横向和竖向加速度、横向振幅与位移进行分析,评定列车通过该小半径反向曲线桥梁的运营性能.根据试验分析结果,对小半径反向曲线上桥梁动力特性的理论分析进行验证和比较,提出桥梁有限元模型中基础刚度计算修正的建议.然后,根据修正后的桥梁计算模型,进一步对本桥车桥耦合振动响应进行数值分析,提出货运列车通过该桥梁的合理运行速度及相关建议.

英文摘要：

In this paper,based on the dynamic load test for the newly built bridge on small radius and reverse curve for the East-Ease-Line of North Ningbo Station,the coupled vibration theory of train-curve-bridge was expounded.The transverse natural frequency,lateral and vertical acceleration,transversal amplitude and dis-placement of the bridge structure were analyzed according to test results to evaluate the operating performance of the freight train passing this bridge.According to the test results,the theoretical analysis on the dynamic characteristics of small radius reverse curve bridge was also verified and compared.Suggestions were proposed on the revision of the calculation of the foundation stiffness in the finite element model of the bridge.Then nu-merical analysis of vehicle-bridge coupling vibration response for this bridge was further done according to re-vised bridge calculation model,and the reasonable speed of the freight train passing the bridge and other sug-gestions for the train passing this special bridge were proposed.