Abstract
Low frequency surface wave measurements offer a non-intrusive and inexpensive means to characterize deep shear wave velocity profiles (VS) for earthquake site response analysis. In this study, results are presented from low-frequency (1 to 12 Hz) surface wave measurements performed at a deep soil site in the Central United States using active and passive-source methods. Active-source measurements were performed using a lowfrequency servo-hydraulic shaker and were analyzed using both the Spectral-Analysis-ofSurface-Waves (SASW) approach and the multi-channel frequency-wavenumber (f-k) method. Passive surface waves recorded using a circular array and a linear array were analyzed using the f-k approach and the Refraction-Microtremor (ReMi) approach, respectively. Dispersion curves from the two active-source methods are in good agreement over the frequency range of this study. Low-frequency passive energy in the frequency range of 1 Hz to 2.5 Hz was prevalent at this remote farm site. Dispersion curves in this frequency range developed from the circular-array passive measurements are consistent with the active source measurements. The linear-array passive approach (ReMi) provided three estimates of the dispersion curve that are consistent with the other methods at frequencies above 2 Hz but varied considerably at lower frequencies.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
