RESEARCH ON DYNAMIC RESPONSE LAWS OF LINING STRUCTURE OF TUNNELS BASED ON WAVELET ANALYSIS

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.