Seismic response of slopes subjected to incident SV wave by an improved boundary element approach

Abstract

In this paper, an improved boundary element approach for 2D elastodynamics in time-domain is presented. This approach consists in the truncation of time integrations, based on the rapid decrease of the fundamental solutions with time. It is shown that an important reduction of the computation time as well as the storage requirement can be achieved. Moreover, for half-plane problems, the size of boundary element (BE) meshes and the computation time can be significantly reduced. The proposed approach is used to study the seismic response of slopes subjected to incident SV waves. It is found that large amplifications take place on the upper surface close to the slope, while attenuations are produced on the lower surface. The results also show that surface motions become very complex when the incident wavelength is comparable with the size of the slope or when the slope is steep

Seismic site effects by an optimized 2D BE/FE method I. Theory, numerical optimization and application to topographical irregularities

“…HYBRID has been used to analyze the seismic response of topographical irregularities in [11,12,18,16,15].…”

“…Its size is nearly independent of the width of the time window. The influence of spatial truncation is studied on trapezoidal hills in [16], on the model presented in paragraph 2.5.2. Two types of mesh patterns are considered: one extended up to a distance of interval [ ]…”

Failure Mechanism of an Idealized Layered Rock Slope Subjected to Seismic Loads

“…Latha et al [11] carried out seismic stability analysis of a Himalayan rock slope using both the pseudo-static approach and the finite difference code of FLAC. Gatmiri et al [12] used an improved boundary element approach to study the seismic response of slopes subjected to incident SV waves.…”