Takis Georgarakos

TL;DR: In this article, a multisegment tunnel is modeled as a beam connected to the ground through properly calibrated interaction springs, dashpots, and sliders, and free-field acceleration time histories are computed from these records through one-dimensional wave propagation equivalent-linear and nonlinear analyses of parametrically different soil profiles along the tunnel.

TL;DR: In this article, a numerical study is presented for a rigid block supported through a frictional contact surface on a horizontal or an inclined plane, and subjected to horizontal or slope-parallel excitation.

TL;DR: In this paper, a modified kinematic hardening constitutive model is developed and encoded in ABAQUS through a user-defined subroutine, and the retaining walls are analyzed at model scale, assuming model parameters appropriate for very small confining pressures.

TL;DR: In this article, the response of a future 70 m deep immersed tunnel to the consecutive action of a major nor-mal fault rupturing in an earthquake occurring in the basement rock underneath the tunnel, and a subsequent strong excitation from a different large-magnitude seismic event that may occur years later was investigated.

TL;DR: In this article, the authors investigate the nonlinear response of a surface foundation on sand and its effect on the seismic performance of an idealized slender single-degree-of-freedom structure.