TY - GEN
T1 - Seismic site characterization using Harmonic Wavelet Analysis of Wave (HWAW) method
AU - Kim, Dong Soo
AU - Park, Hyung Choon
AU - Kim, Jong Tae
AU - Park, Heon Joon
AU - Bang, Eun Seok
PY - 2008
Y1 - 2008
N2 - The HWAW (Harmonic Wavelet Analysis of Wave) method, which is non-destructive method using time-frequency analysis of body and surface waves, has the advantages of obtaining 2 dimensional subsurface stiffness imaging. The site characterization using HWAW method consists of three steps: 1) field testing, 2) evaluation of dispersion curve, and 3) determination of shear wave velocity (Vs) profile using a single array inversion method. The field testing is relatively simple and fast because one experimental setup which consists of one pair of receivers is needed to determine the dispersion curve of the whole depth. HWAW method can sample much deeper part of the site than the phase unwrapping method because it mainly uses the signal portion of the maximum signal/noise ratio to evaluate the phase velocity and it can minimize the effects of noise. HWAW method can use a single array inversion which considers receiver and source locations using whole wave field information. To estimate the applicability of HWAW method, field tests were also performed at 2 sites and test results obtained by HWAW method were compared with those by conventional surface wave methods and down hole test. Finally, a model testing site where the material properties and layer information are known was constructed and by comparing 2 dimensional Vs profile obtained by HWAW method to the reference data, the reliability of HWAW method was verified.
AB - The HWAW (Harmonic Wavelet Analysis of Wave) method, which is non-destructive method using time-frequency analysis of body and surface waves, has the advantages of obtaining 2 dimensional subsurface stiffness imaging. The site characterization using HWAW method consists of three steps: 1) field testing, 2) evaluation of dispersion curve, and 3) determination of shear wave velocity (Vs) profile using a single array inversion method. The field testing is relatively simple and fast because one experimental setup which consists of one pair of receivers is needed to determine the dispersion curve of the whole depth. HWAW method can sample much deeper part of the site than the phase unwrapping method because it mainly uses the signal portion of the maximum signal/noise ratio to evaluate the phase velocity and it can minimize the effects of noise. HWAW method can use a single array inversion which considers receiver and source locations using whole wave field information. To estimate the applicability of HWAW method, field tests were also performed at 2 sites and test results obtained by HWAW method were compared with those by conventional surface wave methods and down hole test. Finally, a model testing site where the material properties and layer information are known was constructed and by comparing 2 dimensional Vs profile obtained by HWAW method to the reference data, the reliability of HWAW method was verified.
UR - https://www.scopus.com/pages/publications/84883388739
M3 - Conference contribution
AN - SCOPUS:84883388739
SN - 9781627481519
T3 - 15th International Congress on Sound and Vibration 2008, ICSV 2008
SP - 1283
EP - 1290
BT - 15th International Congress on Sound and Vibration 2008, ICSV 2008
T2 - 15th International Congress on Sound and Vibration 2008, ICSV 2008
Y2 - 6 July 2008 through 10 July 2008
ER -