轨道交通荷载作用下单双箱梁桥空间振动研究

被引:4
作者
宋福春
王瑜
机构
[1] 沈阳建筑大学土木工程学院
关键词
双箱桥; 空间振动; 共振; 动力响应;
D O I
暂无
中图分类号
U441.3 [];
学科分类号
0814 ; 081406 ;
摘要
目的为解决一体式单线桥梁占地空间大、施工周期长、造价高的问题,建立单双箱有限元模型,对单双线高架桥梁在轨道荷载的动力作用下进行研究.方法分别建立桥梁子系统模型和车辆子系统模型,忽略轨道竖向不平顺,考虑车辆横向蛇形运动,运用快速模态动力学分析工具(IMDplus)进行移动荷载作用下桥梁结构动力响应计算.结果双线桥的主频率比单线桥大12%;单列车过桥工况下,双线桥的横、竖向位移比单线桥分别减少42%、36%,双线桥的横、竖向加速度比单线桥分别减少21%、22%;双列车过桥工况下,双线桥的横、竖向位移及其加速度较单线桥分别减少20%、17%和12%、17%.结论在轨道交通荷载作用下双线桥较单线桥具有刚度大、节省空间、结构动力响应小等优势.
引用
收藏
页码:824 / 832
页数:9
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