### Abstract

The spectral analysis of surface wave (SASW) method is a non-destructive testing technique base on the Rayleigh wave dispersion that has been advanced in this study for the evaluation of the material properties of the soil subgrade structure in irregular profile, i.e. pavement system. The Rayleigh wave is generated by transient impact sources and then the wave motion is processed using the spectrum analyzer to obtain the amplitude spectrum of vertical displacement in the frequency domain. The objective of this study is to describe the procedure of the SASW method for determining the frequency-independent attenuation, a_{0} and the geometric damping ratio, D of the soil structure. Both parameters are useful for dynamic geotechnical structural design. A frequency-independent attenuation empirical coefficient (a _{0}) of the Bornitz equation was obtained from the auto power spectrum produced by the spectrum analyzer. Subsequently the damping ratio (D) was able to be calculated using the attenuation coefficient parameter from the Bornitz model. The damping ratio obtained by the Bornitz model was similar to the values calculated using Spectral Ratio and Transfer Function model. Good agreement was also found between the values obtained in this study compared to that of other researchers.

Original language | English |
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Title of host publication | 12th International Conference on Computer Methods and Advances in Geomechanics 2008 |

Pages | 2658-2670 |

Number of pages | 13 |

Volume | 4 |

Publication status | Published - 2008 |

Event | 12th International Conference on Computer Methods and Advances in Geomechanics 2008 - Goa Duration: 1 Oct 2008 → 6 Oct 2008 |

### Other

Other | 12th International Conference on Computer Methods and Advances in Geomechanics 2008 |
---|---|

City | Goa |

Period | 1/10/08 → 6/10/08 |

### Fingerprint

### Keywords

- Frequency-independent attenuation
- Geometric damping
- SASW method

### ASJC Scopus subject areas

- Geotechnical Engineering and Engineering Geology
- Applied Mathematics

### Cite this

*12th International Conference on Computer Methods and Advances in Geomechanics 2008*(Vol. 4, pp. 2658-2670)

**Determination of attenuation and geometric damping on clayey sand residual soil in irregular profile using surface wave method.** / Rosyidi, S. A.; Taha, Mohd. Raihan; Chik, Z.; Ismail, Amiruddin.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

*12th International Conference on Computer Methods and Advances in Geomechanics 2008.*vol. 4, pp. 2658-2670, 12th International Conference on Computer Methods and Advances in Geomechanics 2008, Goa, 1/10/08.

}

TY - GEN

T1 - Determination of attenuation and geometric damping on clayey sand residual soil in irregular profile using surface wave method

AU - Rosyidi, S. A.

AU - Taha, Mohd. Raihan

AU - Chik, Z.

AU - Ismail, Amiruddin

PY - 2008

Y1 - 2008

N2 - The spectral analysis of surface wave (SASW) method is a non-destructive testing technique base on the Rayleigh wave dispersion that has been advanced in this study for the evaluation of the material properties of the soil subgrade structure in irregular profile, i.e. pavement system. The Rayleigh wave is generated by transient impact sources and then the wave motion is processed using the spectrum analyzer to obtain the amplitude spectrum of vertical displacement in the frequency domain. The objective of this study is to describe the procedure of the SASW method for determining the frequency-independent attenuation, a0 and the geometric damping ratio, D of the soil structure. Both parameters are useful for dynamic geotechnical structural design. A frequency-independent attenuation empirical coefficient (a 0) of the Bornitz equation was obtained from the auto power spectrum produced by the spectrum analyzer. Subsequently the damping ratio (D) was able to be calculated using the attenuation coefficient parameter from the Bornitz model. The damping ratio obtained by the Bornitz model was similar to the values calculated using Spectral Ratio and Transfer Function model. Good agreement was also found between the values obtained in this study compared to that of other researchers.

AB - The spectral analysis of surface wave (SASW) method is a non-destructive testing technique base on the Rayleigh wave dispersion that has been advanced in this study for the evaluation of the material properties of the soil subgrade structure in irregular profile, i.e. pavement system. The Rayleigh wave is generated by transient impact sources and then the wave motion is processed using the spectrum analyzer to obtain the amplitude spectrum of vertical displacement in the frequency domain. The objective of this study is to describe the procedure of the SASW method for determining the frequency-independent attenuation, a0 and the geometric damping ratio, D of the soil structure. Both parameters are useful for dynamic geotechnical structural design. A frequency-independent attenuation empirical coefficient (a 0) of the Bornitz equation was obtained from the auto power spectrum produced by the spectrum analyzer. Subsequently the damping ratio (D) was able to be calculated using the attenuation coefficient parameter from the Bornitz model. The damping ratio obtained by the Bornitz model was similar to the values calculated using Spectral Ratio and Transfer Function model. Good agreement was also found between the values obtained in this study compared to that of other researchers.

KW - Frequency-independent attenuation

KW - Geometric damping

KW - SASW method

UR - http://www.scopus.com/inward/record.url?scp=84869814168&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84869814168&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:84869814168

SN - 9781622761760

VL - 4

SP - 2658

EP - 2670

BT - 12th International Conference on Computer Methods and Advances in Geomechanics 2008

ER -