Hollender F., Cornou Cécile, Dechamp A., Oghalaei K., Renalier F., Maufroy E., Burnouf C., Thomassin S., Wathelet Marc, Bard P. Y., Boutin V., Desbordes C., Douste-Bacque I., Foundotos L., Guyonnet-Benaize C., Perron V., Regnier J., Roulle A., Langlais M., Sicilia D. (2018). Characterization of site conditions (soil class, V-s30, velocity profiles) for 33 stations from the French permanent accelerometric network (RAP) using surface-wave methods. Bulletin of Earthquake Engineering, 16 (6), p. 2337-2365. ISSN 1570-761X.
Titre du document
Characterization of site conditions (soil class, V-s30, velocity profiles) for 33 stations from the French permanent accelerometric network (RAP) using surface-wave methods
Année de publication
2018
Auteurs
Hollender F., Cornou Cécile, Dechamp A., Oghalaei K., Renalier F., Maufroy E., Burnouf C., Thomassin S., Wathelet Marc, Bard P. Y., Boutin V., Desbordes C., Douste-Bacque I., Foundotos L., Guyonnet-Benaize C., Perron V., Regnier J., Roulle A., Langlais M., Sicilia D.
Source
Bulletin of Earthquake Engineering, 2018,
16 (6), p. 2337-2365 ISSN 1570-761X
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.
Plan de classement
Géologie et formations superficielles [064]
;
Géophysique interne [066]
Description Géographique
FRANCE
Localisation
Fonds IRD [F B010073025]
Identifiant IRD
fdi:010073025
