抄録
Based on the seismic deformation method, a new finite element inelastic model is developed to analyze the transverse direction of shield tunnels. The model is subjected to ground displacements and shear stress es determined from the free field earthquake response. The response is determined by applying increments of the external forces. The incremental and the total forces (stresses) in the tunnel (ground springs) are determined. The updated coordinates and stiffness matrices can be determined according to the new elastic/inelastic conditions. The model is utilized in studying the response of sewage shield tunnels at Takamatsu (with secondary lining) and at Karimojima (without secondary lining) in Kobe City during Hyogo-Ken Nanbu Earthquake.
