摘要
通过高速铁路隧道衬砌振动响应的现场试验,发现隧道衬砌拱圈在列车荷载作用下,其振动加速度幅值随车速的增大而增大,且拱圈横向振动与竖向振动呈现不同的传递规律。文中开展理论分析与仿真计算,建立ABAQUS有限元平面模型,采用动力隐式算法对不同车速列车荷载作用下的隧道衬砌拱圈振动响应问题进行了理论分析,得出以下结果:有限元数值计算结果与实测结果基本吻合,可用作对实际测量数据的补充与预测;隧道振动响应随列车速度的增加而呈现增大趋势;不同车速引起的衬砌振动加速度响应传递规律一致;不同车速引起的衬砌竖向振动加速度幅值在拱顶位置较小,且随列车时速增大而变化不明显;衬砌拱顶横向振动明显随列车速度的增大而增大,但不同车速引起的衬砌横向振动在隧道圆心水平位置(即0°与180°)随列车时速变化不明显,且振动幅值较低;拟合了不同时速列车引起的隧道衬砌横向与竖向振动加速度的经验公式。
Through the field tests, the study finds that the vibration of a lining arch under train load grows up with the increasing of train speed, and that the lateral and vertical vibrations of the arch show different transfer laws. A finite element model was established based on ABAQUS, and the vibration response of a tunnel lining arch under train loads at different speeds was analyzed by an implicit method. The study results show that： the calculation results of finite element agree well with the measured values, which could be used as a supplement and forecast of the actual measurement data; and the vibration response of tunnel grow up with the increasing of train speed; the accelerations of the vibration response of lining caused by different speeds are consistent; and the vertical vibrations of the lining caused by different train speeds are smaller in the vault, whose change is not obvious with the increasing of the train speed; and the lateral vibration of the lining arch increases obviously with the increasing of the train speed, but the different speed caused by transverse vibration in the horizontal position of the center of lining tunnel（at 0° and 180°） with the train speed did not change significantly, and the vibration amplitude is lower; the empirical formula is fitted for the lateral and vertical vibration accelerations of the tunnel lining caused by different speed trains.
作者
田甜
雷洋
齐法琳
黎国清
TIAN Tian;LEI Yang;QI Fa-lin;LI Guo-qing(China Academy of Railway Science, Beijing 100081, China;China Academy of Railway Science, Infrastructure Inspection Research Institute, Beijing 100081, China)
出处
《工程力学》
EI
CSCD
北大核心
2018年第5期143-151,共9页
Engineering Mechanics
基金
国家自然科学基金委员会-中国铁路总公司高速铁路基础研究联合基金项目(U1434211)
国家重点基础研究发展计划项目(973计划)(2013CB036205)
关键词
不同列车荷载
衬砌拱圈
振动响应
现场试验
数值模拟
train load at different speeds
arch lining
vibration response
field tests
numerical simulation
