Characterization of site conditions (soil class, VS30, velocity profiles) for 33 stations from the French permanent accelerometric network (RAP) using surface-wave methods

Characterization of site conditions (soil class, VS30, velocity profiles) for 33 stations from the French permanent accelerometric network (RAP) using surface-wave methods

Data provided by accelerometric networks are important for seismic hazard assessment. The correct use of accelerometric signals is conditioned by the station site metadata quality (i.e., soil class, V S30 , velocity profiles, and other relevant information that can help to quantify site effects). In...

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Bibliographic Details
Published in:Bulletin of earthquake engineering Vol. 16; no. 6; pp. 2337 - 2365
Main Authors: Hollender, Fabrice, Cornou, Cécile, Dechamp, Aline, Oghalaei, Kaveh, Renalier, Florence, Maufroy, Emeline, Burnouf, Clément, Thomassin, Sylvette, Wathelet, Marc, Bard, Pierre-Yves, Boutin, Vincent, Desbordes, Clément, Douste-Bacqué, Isabelle, Foundotos, Laetitia, Guyonnet-Benaize, Cédric, Perron, Vincent, Régnier, Julie, Roullé, Agathe, Langlais, Mickael, Sicilia, Deborah
Format: Journal Article
Language:English
Published: Dordrecht Springer Netherlands 01-06-2018
Springer Nature B.V
Springer Verlag
Subjects:
Accelerometers
Broadband
Civil Engineering
Computation
Conditioning
Dispersion
Earth and Environmental Science
Earth Sciences
Environmental Engineering/Biotechnology
Geological hazards
Geophysics
Geophysics/Geodesy
Geotechnical Engineering & Applied Earth Sciences
Hazard assessment
High frequency
Hydrogeology
Methods
Original Research Paper
Rayleigh waves
Rocks
Sciences of the Universe
Seismic hazard
Seismic velocities
Soil
Soil conditions
Stations
Structural Geology
Surface waves
Surveying
Velocity
Velocity distribution
Velocity profiles
Vibration
Vibration analysis
Wave dispersion
Wave velocity
France
Velocity profile
Surface-wave methods
Accelerometric network
V
Epos-France
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Description
Summary:Data provided by accelerometric networks are important for seismic hazard assessment. The correct use of accelerometric signals is conditioned by the station site metadata quality (i.e., soil class, V S30 , velocity profiles, and other relevant information that can help to quantify site effects). In France, the permanent accelerometric network consists of about 150 stations. Thirty-three of these stations in the southern half of France have been characterized, using surface-wave-based methods that allow derivation of velocity profiles from dispersion curves of surface waves. The computation of dispersion curves and their subsequent inversion in terms of shear-wave velocity profiles has allowed estimation of V S30 values and designation of soil classes, which include the corresponding uncertainties. From a methodological point of view, this survey leads to the following recommendations: (1) perform both active (multi-analysis surface waves) and passive (ambient vibration arrays) measurements to derive dispersion curves in a broadband frequency range; (2) perform active acquisitions for both vertical (Rayleigh wave) and horizontal (Love wave) polarities. Even when the logistic contexts are sometimes difficult, the use of surface-wave-based methods is suitable for station-site characterization, even on rock sites. In comparison with previous studies that have mainly estimated V S30 indirectly, the new values here are globally lower, but the EC8-A class sites remain numerous. However, even on rock sites, high frequency amplifications may affect accelerometric records, due to the shallow relatively softer layers.
ISSN:1570-761X
1573-1456
DOI:10.1007/s10518-017-0135-5