Analytical solution for seismic response of deep tunnels covered by an isolation layer subjected to SH waves

Abstract

AbstractThe paper presented a novel analytical solution to evaluate the seismic‐induced stresses and displacements of tunnels covered by an isolation coating layer subjected to SH waves. The solution is derived based on the assumptions that the ground, isolation coating layer, and liner are linear elastic and in steady‐state motion. The analytical solution is obtained using the Bessel‐Fourier series. Comparisons are made between the seismic responses of tunnels obtained using the proposed analytical solution and those of the simulation results from the FEM software ABAQUS. Additionally, the proposed solution is also compared with the known degraded solution from the literature to validate its accuracy. The influence of various key factors, such as the Young's modulus ratio between the coating layer and the ground, the thickness of the coating layer, and the relative stiffness between the ground and the liner, on the seismic response of tunnels are investigated using the proposed analytical solution.