CAJ | 학술논문

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 Simulink 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。
이대련성시궤도교통련속량교위대상，연구료열차속도、행차공황이급불동규범지진삼수대우교량결구적영향，건립열차하재간화모형，이용리산부리협변환법득도궤도불평순，결합 Simulink 방진득출궤도열차수향격려하재。득도여하결론：열차적속도대우교량절점적위이변화구유명현적영향；교량수향위이재열차쌍선공황하교단선공황증가명현；안성시궤도교통항진규범（심비고）지진삼수계산적교량반응치균대우안철로공정항진설계규범지진삼수계산치，안조전자설계적교량구유경고적안전도。
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 ob-tained 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 sig-nificant impact on the displacement of the mid-span node of the bridge structure;The vertical displacement of the mid-span 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 ap-proval)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.