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中文摘要：
以大连城市轨道交通连续梁桥为对象，研究了列车速度、行车工况以及不同规范地震参数对于桥梁结构的影响，建立列车荷载简化模型，利用离散傅里叶变换法得到轨道不平顺，结合Simtdink仿真得出轨道列车竖向激励荷载。得到如下结论：列车的速度对于桥梁节点的位移变化具有明显的影响；桥梁竖向位移在列车双线工况下较单线工况增加明显；按城市轨道交通抗震规范（审批稿）地震参数计算的桥梁反应值均大于按铁路工程抗震设计规范地震参数计算值，按照前者设计的桥梁具有更高的安全度。
英文摘要：
Taking the continuous beam bridge structure of Dalian urban rail transit for a research objective, the dynamic response analysis on the urban rail transit＇ s bridge structure under the effects of earthquake and train loads is carried out, including the effects of the different speeds, driving conditions and seismic parameters in different design codes for the bridge structure. For this purpose, the simplified model of the train load is built, then the track irregularity value is obtained by using discrete Fourier transform method, and the vertical excitation load of the train is obtained through Simulink simulation. Simultaneously, some important conclusions are drawn as follows： The speed of the train has a significant impact on the displacement of the mid-span node of the bridge structure; The vertical displacement of the midspan node has a significant increase under the bidirectional train driving condition than one-way train driving conditions; The response values calculated by the parameters in the code for the seismic design of urban rail transit（ draft for approval） are greater than those calculated by the parameter in the code for the seismic design of railway engineering, and the bridge designed by the former code has a higher security degree.
同期刊论文项目
同项目期刊论文
Experimental Studies on Seismic Performance of Subsidiary Piers of Long-Span Cable-Stayed Bridge wit
Study on Dynamic Characteristics of Long Span Continuous Bridge from Construction to Completion Cons
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