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http://dx.doi.org/10.7843/kgs.2006.22.12.15

Determination of Mode Dispersion Curves of Surface Wave Using HWAW Method  

Park, Hyung-Choon (Dept. of Civil Engrg., Chungnam National Univ.)
Kim, Dong-Soo (Dept. of Civil Engrg., KAIST)
Bang, Eun-Seok (Dept. of Civil Engrg., KAIST)
Publication Information
Journal of the Korean Geotechnical Society / v.22, no.12, 2006 , pp. 15-24 More about this Journal
Abstract
The evaluation of shear modulus is very important in various fields of civil engineering. Non-destructive seismic methods can be used to determine shear wave velocity ($V_s$) profile. Non-destructive seismic methods geneally consist of three steps: field testing, evaluation of dispersion curve, and determination of Vs profile by inversion process. Non-destructive seismic methods can be divided into two categories according to the number of receivers used for data reduction: two-channel tests and multi-channel tests. Two channel tests use apparent velocity dispersion curve and multi-channel tests use mode dispersion curves. Multi-channel tests using mode dispersion curve can reduce calculation time to determine soil profile and uncertainties in inversion process. So far, only multi-channel tests can determine mode dispersion curves but multi-channel test needs many receivers to determine reasonable mode dispersion curves. In this paper, HWAW (Harmonic Wavelet Analysis of Wave) method is applied to determine mode dispersion curves. HWAW method uses short test setup which consists of two receivers with a spacing of 1 to 3 m. Through numerical simulations and field application, it is shown that HWAW can determine resonable mode disperson curves.
Keywords
HWAW; Mode dispersion curve; Mode seperation;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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