A5061289747- Seismic Waves and Analysis
- Seismic Imaging and Inversion Techniques
- earthquake and tectonic studies
- Seismic Performance and Analysis
- Geotechnical Engineering and Underground Structures
- Electromagnetic Simulation and Numerical Methods
- Advanced Numerical Methods in Computational Mathematics
- Seismology and Earthquake Studies
- Landslides and related hazards
- Geotechnical Engineering and Soil Mechanics
- Geological Modeling and Analysis
- Geophysical Methods and Applications
- Drilling and Well Engineering
- Reservoir Engineering and Simulation Methods
- Structural Health Monitoring Techniques
- Numerical methods for differential equations
- Geophysics and Sensor Technology
- Advanced Algorithms and Applications
- Vibration and Dynamic Analysis
- Dam Engineering and Safety
- Parallel Computing and Optimization Techniques
- Soil Moisture and Remote Sensing
- Tree Root and Stability Studies
- Geological formations and processes
- Hydraulic Fracturing and Reservoir Analysis
Bureau de Recherches Géologiques et Minières
2013-2025
Sig Holding (Switzerland)
2019
Laboratoire de Mécanique des Sols, Structures et Matériaux
2007-2012
CentraleSupélec
2008-2012
United States Geological Survey
2011
PREdiction of NOn-LINear soil behavior (PRENOLIN) is an international benchmark aiming to test multiple numerical simulation codes that are capable predicting nonlinear seismic site response with various constitutive models.One the objectives this project assessment uncertainties associated 1D effects.A first verification phase (i.e., comparison between on simple idealistic cases) will be followed by a validation phase, comparing predictions such estimations actual strongmotion recordings...
This article presents the main results of validation phase PRENOLIN project.PRENOLIN is an international benchmark on 1D nonlinear (NL) site-response analysis.This project involved 19 teams with 23 different codes tested.It was divided into two phases; first verifying numerical solution these idealized soil profiles using simple signals and real seismic records.The second described in this referred to code for analysis instrumented sites.This performed sites (KSRH10 Sendai) Japanese...
Research Article| January 21, 2014 The Effect of Lateral Heterogeneity on Horizontal‐to‐Vertical Spectral Ratio Microtremors Inferred from Observation and Synthetics Shinichi Matsushima; Matsushima aDisaster Prevention Institute, Kyoto University, Gokasho, Uji, 611‐0011, Japanmatsushima@zeisei.dpri.kyoto-u.ac.jp Search for other works by this author on: GSW Google Scholar Takanori Hirokawa; Hirokawa bYamashita Sekkei Inc, 6‐1 Koami‐cho Nihombashi, Chuo‐Ku, Tokyo 103‐8542, Japan Florent De...
n a low‐seismicity context, the use of numerical simulations becomes essential due to lack representative earthquakes for empirical approaches. The goals EUROSEISTEST Verification and Validation Project (E2VP) are provide (1) quantitative analysis accuracy current, most advanced methods applied realistic 3D models sedimentary basins (verification) (2) comparison recorded ground motions with their predictions (validation). target is site located within Mygdonian basin, Greece. instrumented...
Differences between 3-D numerical predictions of earthquake ground motion in the Mygdonian basin near Thessaloniki, Greece, led us to define four canonical stringent models derived from complex realistic model basin.Sediments atop an elastic bedrock are modelled 1D-sharp and 1D-smooth using three homogeneous layers smooth velocity distribution, respectively.The 2D-sharp 2D-smooth extensions 1-D asymmetric sedimentary valley.In all cases, wavefields include strongly dispersive surface waves...
Seismic wave characteristics are influenced by several physical processes, including theearthquake source, geometrical effects such as topography, and local amplification phenomena.In urban environments, civil structures introduce an additional complexity in the wavefieldevolution. While earthquake engineers have traditionally regarded buildings passiverecipients of seismic waves, diverse seismological studies demonstrated that buildingclusters can significantly alter ground motion (e.g....
On November 11, 2019 a very shallow magnitude Mw 4.9 earthquake shook Le Teil (Ardèche, France), some ten kilometres from two nuclear facilities. This earthquake, the strongest in metropolitan France last twenty years, occurred on fault which was not identified as an active BDFA (Jomard et al., 2017) given its selection criteria, highlighting importance of studying seismic hazard low-seismicity areas. region with many assets, most are located Rhône valley and therefore...
The Grenoble basin, located in the French Alps, is a region of significant interest for seismic hazard assessment due to its thick sedimentary layers and surrounding high massifs, leading 2D/3D complex wave propagation patterns. With aim develop suitable strategies microzonation alpine valleys, this study focuses on response basin using state-of-the-art 3D simulations performed with EFISPEC3D spectral element method code frequencies up 5 Hz. These capture intricate interactions between...
This article presents the verification of a spectral-element method (SEM) code using so-called layer over half-space 3 (LOH.3) benchmark model Southern California Earthquake Center to 7 Hz with minimum S-wave velocity 2000 m/s. First, approach Liu and Archuleta (2006) is successfully implemented in an explicit SEM, then, it shown that SEM displays excellent goodness fits (GOFs) five Gauss–Lobatto–Legendre (GLL) nodes per wavelength at Hz. A parametric study on influence number GLL shows more...
Abstract We compare different methods to estimate frequency‐domain amplification and duration lengthening of earthquake ground motion in the Mygdonian basin (Greece). Amplification is measured by standard spectral ratios (SSRs) horizontal component or single‐station horizontal‐to‐vertical (EHVRs). Duration either group delay method (Beauval et al. , 2003) labeled GDDL, based on significant (Trifunac Brady, 1975) TBDL. The are applied both high‐quality recordings European experimental site...
The objective of this article is to present the nonlinear response a soft sedimentary site based on one-dimensional inversion by genetic algorithm shear-wave velocity structure and damping factors borehole soil column during 2005 Fukuoka Prefecture Western Offshore earthquake.First, we confirm that, according source rupture mechanism, major minor axes in horizontal plane at station are transverse radial directions, respectively.Then, order corroborate linear domain S-wave transfer function...
SUMMARY Which physical parameters are the most influential when predicting earthquake ground motions in a 3-D sedimentary basin? We answer quantitatively by doing global sensitivity analysis of two quantities interest: peak (PGMs) and time–frequency representation (the S transform) resulting from synthetic anelastic responses EUROSEISTEST. This domain interest is modeled layers with uncertain depth-dependent mechanical properties illuminated plane S-wave propagating vertically upward an...
Abstract This article investigates the impact of 2D and 3D geometric effects (i.e., topography nonhorizontal‐layering effects) on Green’s functions spectral ratios inside vertical arrays by using numerical simulations. All simulations are carefully performed a spectral‐element method order six valid in frequency range 0.05–10 Hz. Analysis reveals that surface‐to‐downhole ratio is very sensitive physical variable with respect to problem’s geometry; and, consequently, it should be analysed...
In certain geological settings such as sedimentary basins, the ground motion induced by an earthquake may be amplified local site conditions. Estimating these effects is important for seismic hazard assessment but can difficult to do empirically due scarcity of site-specific field data in time and space, especially low-to-moderate seismicity regions where earthquakes needed measuring have long return periods. this study, we try overcome limitations investigate alternative approach based on...
Since a few decades volcanic long period (LP) events have been recorded on many active volcanoes and their study has recognized as an important tool to characterize activity. LP event analyses through moment tensor (MT) inversions led kinematic descriptions of various source mechanisms. The main challenge in these is ‘strip out’ the propagation effect order isolate source; hence velocity model used controls accuracy retrieved mechanism. We first carry out several synthetic tests Mt Etna...
The coupling between an implicit finite elements (FE) code and explicit spectral (SE) has been explored for solving the elastic wave propagation in case of soil/structure interaction problem. approach is based on domain decomposition methods transient dynamics. spatial at interface managed by a standard mortar approach, whereas time integration dealt with hybrid asynchronous integrator. An external software, handling problem, set up order to couple FE software Code_Aster SE EFISPEC3D.
In this paper, we are interested in the seismic wave propagation into an uncertain medium. To end, performed ensemble of 400 large-scale simulations that requires 4 million core-hours CPU time. addition to large computational load these simulations, solving uncertainty problem dedicated procedures handle complexities inherent dataset size and low number samples. We focus on peak ground motion at free surface 3D domain, our analysis utilizes a surrogate model combining two key ingredients for...