摘要
阐述了隧道衬砌结构动力有限元分析的小波解析方法与粘弹性边界条件,采用弹簧–阻尼单元模拟粘弹性边界条件;建立了相应的有限元分析模型,并利用现场振动测试成果,对京广线朱亭隧道在提速列车振动荷载作用下的动力响应特性进行分析研究,得出了衬砌结构各特征点处的振动位移、加速度、弯矩、剪力与轴力的时程响应规律,将计算结果与现场测试成果进行对比分析证明所提出的分析方法是合理的。研究成果对进一步分析提速铁路隧道衬砌结构的动力稳定性具有重要意义。
A method of wavelet analysis with the dynamic FEM of lining structure of tunnels and a viscoelastic boundary condition are expounded. The spring-damper element is adopted to simulate the viscoelastic boundary condition. And then, a corresponding FEM model is established. Based on the results of in-situ vibration measurement, the dynamic properties of Zhuting Tunnel on the Beijing-Guangzhou Line are analyzed under the vibrating loadings of the speed-up train. The time-response laws of vibration displacements, accelerations, bending moments, axial forces and shear forces of characteristic spots on the lining structure, are obtained. Comparing the calculation results with the in-situ data shows that the proposed method is reasonable. The results are significant for the analysis of structure stability of tunnel with speed-up trains passing through.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2005年第10期1746-1750,共5页
Chinese Journal of Rock Mechanics and Engineering
基金
湖南省教育科学研究基金资助项目(B30207)
上海市重点研究基金资助项目
关键词
隧道工程
提速列车
衬砌结构
小波分析
粘弹性边界
动力分析
Bending moments
Boundary conditions
Dimensional stability
Dynamic response
Finite element method
Tunnel linings
Vibration measurement
Vibrations (mechanical)
Viscoelasticity
Wavelet transforms
