Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Shear wave velocities of Mississippi embayment soils from low frequency surface wave measurements
AbstractDeep unconsolidated sediments in the Mississippi embayment will influence ground motions from earthquakes in the New Madrid seismic zone. Shear wave velocity profiles of these sediments are important input parameters for modeling wave propagation and site response in this region. Low-frequency, active-source surface wave velocity measurements were performed to develop small-strain shear wave velocity (VS) profiles at eleven deep soil sites in the Mississippi embayment, from north of New Madrid, Missouri to Memphis, Tennessee. A servo-hydraulic, low-frequency source was used to excite surface wave energy to wavelengths of 600m, resulting in VS profiles to depths of over 200m. The average VS profile calculated from the eleven sites is in good agreement with common reference VS profiles that have been used in seismic hazard studies of this region. The variability in VS profiles is shown to be associated with changes in formation depth and thickness from site-to-site. Using lithologic information at each site, average formation velocities were developed and compared to previous studies. We found average VS values of about 193m/s for alluvial deposits, 400m/s for the Upper Claiborne formations, and 685m/s for the Memphis Sand formation.
Shear wave velocities of Mississippi embayment soils from low frequency surface wave measurements
AbstractDeep unconsolidated sediments in the Mississippi embayment will influence ground motions from earthquakes in the New Madrid seismic zone. Shear wave velocity profiles of these sediments are important input parameters for modeling wave propagation and site response in this region. Low-frequency, active-source surface wave velocity measurements were performed to develop small-strain shear wave velocity (VS) profiles at eleven deep soil sites in the Mississippi embayment, from north of New Madrid, Missouri to Memphis, Tennessee. A servo-hydraulic, low-frequency source was used to excite surface wave energy to wavelengths of 600m, resulting in VS profiles to depths of over 200m. The average VS profile calculated from the eleven sites is in good agreement with common reference VS profiles that have been used in seismic hazard studies of this region. The variability in VS profiles is shown to be associated with changes in formation depth and thickness from site-to-site. Using lithologic information at each site, average formation velocities were developed and compared to previous studies. We found average VS values of about 193m/s for alluvial deposits, 400m/s for the Upper Claiborne formations, and 685m/s for the Memphis Sand formation.
Shear wave velocities of Mississippi embayment soils from low frequency surface wave measurements
Rosenblad, Brent L. (Autor:in) / Bailey, Jonathan (Autor:in) / Csontos, Ryan (Autor:in) / Van Arsdale, Roy (Autor:in)
Soil Dynamics and Earthquake Engineering ; 30 ; 691-701
28.02.2010
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Shear wave velocities of Mississippi embayment soils from low frequency surface wave measurements
| Online Contents | 2010
Shear wave velocities of Mississippi embayment soils from low frequency surface wave measurements
| British Library Online Contents | 2010