3-D seismic response analysis of long lined tunnels in half-space |
| |
| Authors: | AA Stamos DE Beskos |
| |
| Institution: | Department of Civil Engineering, University of Patras GR-26500 Patras, Greece |
| |
| Abstract: | The dynamic response of infinitely long lined tunnels with a uniform cross-section buried into an elastic or viscoelastic half-space to body and surface harmonic seismic waves is numerically determined by a special direct boundary element method in the frequency domain. The waves have an arbitrary direction of propagation with respect to the axis of the tunnel and this renders the problem three-dimensional. However, this problem is effectively reduced to a two-dimensional one by a coordinate transformation and appropriate integration of the full-space dynamic fundamental solution along the direction of the tunnel axis. Quadratic isoparametric boundary line elements and advanced numerical integration techniques for the treatment of singular integrals produce results of high accuracy. Numerical results are presented for the case of an infinitely long lined tunnel of circular cross-section and compared against those of a full three-dimensional boundary element analysis, as well as those of other methods. Thus the proposed method is illustrated and its merits demonstrated. |
| |
| Keywords: | Boundary Element Method dimensional reduction frequency domain half-space lined tunnels seismic response seismic waves |
| 本文献已被 ScienceDirect 等数据库收录！ |
