地震-列车移动荷载耦合作用下高铁路基振动特性研究
作者:
作者单位:

作者简介:

通讯作者:

基金项目:

山东省自然科学基金项目(ZR201702160391)


Vibration Characteristics of High-speed Railway Subgrade under Earthquake-Train Moving Load Coupling
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
    摘要:

    基于轨道结构-路基-地基动力相互作用理论,建立考虑地震-列车移动荷载耦合输入的轨道结构-路基-地基动力学模型,研究高速铁路路基及轨道在耦合荷载作用下的振动响应问题。通过编制DLOAD子程序并与ABAQUS有限元计算程序联立,实现地震荷载与列车移动荷载耦合作用的施加,以高速铁路桩承式路基及自由式路基为研究对象,对地震-列车移动荷载耦合作用下两种路基系统的动力响应进行数值计算并比较两者的振动响应差异。结果表明,耦合荷载对桩承式路基动力响应影响显著,该荷载作用下桩承式路基会发生共振现象,使得桩承式路基中轨道和路基振动位移幅值均大于自由式路基的振动位移幅值;桩承式路基不会影响路基系统的振动频率,但会改变路基系统的振动大小,桩承式路基中轨道X方向加速度、路肩边及路基坡脚处的竖向加速度分别减小6.2%、50%、28.6%。

    Abstract:

    To analyze the vibration responses of high-speed railway subgrade and track under the coupling action of seismic load and train moving load, a dynamic model of track structure-subgrade-foundation considering the coupling input of earthquake-train moving load was established based on the dynamic interaction of track structure-subgrade-foundation. First, DLOAD subroutine and ABAQUS finite element calculation program were compiled to realize the coupling effect of seismic load and train moving load. Then, the numerical simulation was carried out to analyze the dynamic responses of pile-supported subgrade and free subgrade of high-speed railway under the coupling action of seismic load and train moving load, and the vibration response difference between them were compared. The numerical results showed that the coupling load has a significant effect on the dynamic response of pile-supported subgrade. Under the coupling load, the resonance phenomenon occurs on the pile-supported subgrade, which makes the vibration displacement amplitude of track and subgrade in pile-supported subgrade larger than that of free subgrade. The pile-supported subgrade will not affect the vibration frequency of subgrade system, but will change the vibration amplitude. The acceleration in the X direction of track on pile-supported subgrade, the vertical acceleration at the shoulder and toe of subgrade are reduced by 6.2%, 50%, and 28.6%, respectively.

    参考文献
    相似文献
    引证文献
引用本文

高盟,彭晓东,李大勇,石传志,陈昊.地震-列车移动荷载耦合作用下高铁路基振动特性研究[J].地震工程学报,2021,43(2):386-395. GAO Meng, PENG Xiaodong, LI Dayong, SHI Chuanzhi, CHEN Hao. Vibration Characteristics of High-speed Railway Subgrade under Earthquake-Train Moving Load Coupling[J]. China Earthquake Engineering Journal,2021,43(2):386-395.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
历史
  • 收稿日期:2020-03-15
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2021-05-06