Seismic response of shallow circular tunnels in two-layered ground

摘要

The effect of ground stratification on the seismic response of circular tunnels is investigated, as most practice-oriented studies consider homogeneous ground. A finite element plain-strain model of a circular tunnel cross-section embedded in a two-layered ground is used to highlight the influence of stratification on the tunnel's seismic response. The layers interface was placed at the crown, centre and invert level.