High-performance finite-element simulations of seismic wave propagation in three-dimensional nonlinear inelastic geological media

Abstract

We present finite-element numerical simulations of seismic wave propagation in non linear inelastic geological media. We demonstrate the feasibility of large scale modeling based on an implicit numerical scheme and a nonlinear constitutive model. We illustrate our methodology with an application to regional scale modeling in the French Riviera, which is prone to earthquakes. The PaStiX direct solver is used to handle large matrix numerical factorizations based on hybrid parallelism to reduce memory overhead. A specific methodology is introduced for the parallel assembly in the context of soil nonlinearity. We analyse the scaling of the parallel algorithms on large-scale configurations and we discuss the physical results.

Evaluation of remote collaborative manipulation for scientific data analysis

“…The scientific data were seismic data from a physical simulation of an earthquake near Nice in France [4]. This earthquake is not real, but it is realistic according to localisation and intensity.…”

2-D soil-structure interaction in time domain by the SBFEM and two non-linear soil models

“…The analyzes were carried out with two-dimensional finite elements [49]. Dupros et al [47] used the Finite Element Method to inspect seismic wave propagation in three-dimensional non-linear inelastic geological media. The feasibility of large-scale modeling based on an implicit numerical scheme and a non-linear constitutive model is demonstrated in their work.…”

“…They resulted that besides shaking intensity, soil 0 s relative density and thickness and the building 0 s weight and width, the earthquake strong shaking is of utmost importance. They finally stated that the development of high excess pore pressures, localized drainage in response to the high transient hydraulic gradients, and earthquake-induced ratcheting of the buildings into the softened soil are important effects that should be captured in design procedures estimating liquefaction-induced building settlement [47].…”

3D SEM Approach to Evaluate the Stability of Large-Scale Landslides in Nepal Himalaya

“…Some researcher worked under SEM platform (e.g., Serini 1994;Komatitsch and Tromp 1999;Taylor and Wingate 2000;Pasquetti and Rapetti 2006;Kristel et al 2008;Tromp et al 2008;Dupros et al 2010;Oye et al 2010;Peter et al 2010;Gharti et al 2012, etc.). Some SEM parallel packages developed by Komatitsch, Tromp and their team (Komatitsch et al 2012a, b, c) (2010), GNU plotting tool and Tacplot are used to visualize the results from serial and parallel processors.…”