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Article: Damping-ratio measurements by the spectral-ratio method

TitleDamping-ratio measurements by the spectral-ratio method
Authors
KeywordsBender Element
Damping Ratio
Near-Field Effect
Spectral-Ratio Method
True-Triaxial Apparatus
Issue Date2006
PublisherNRC Research Press. The Journal's web site is located at http://pubs.nrc-cnrc.gc.ca/cgi-bin/rp/rp2_desc_e?cgj
Citation
Canadian Geotechnical Journal, 2006, v. 43 n. 11, p. 1180-1194 How to Cite?
AbstractIn this paper, bender elements are used as sensors to measure the damping ratio of soil by the spectral-ratio method. The results of numerical and physical experiments suggest that adequate measurement precision can be achieved by reducing the two types of inherent biases arising from (i) the near-field effect and (ii) the different transfer functions of the two receiver bender elements. The first bias can be avoided by setting sensors to r1/λ ≥ 2.0 and r1/r2 ≥ 2.0, where r1 and r2 are the distances between the source and the first and second receivers, respectively; and λ is the wavelength. The second bias can be minimized by modifying the original spectral-ratio method to accommodate the self-healing technique. The damping ratios, measured by this modified method, obtained from the experiment conducted in a tailor-made, true-triaxial apparatus are very similar to those obtained from resonant column tests under the same state of stress. © 2006 NRC Canada.
Persistent Identifierhttp://hdl.handle.net/10722/150392
ISSN
2015 Impact Factor: 1.877
2015 SCImago Journal Rankings: 2.093
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorWang, YHen_US
dc.contributor.authorYan, WMen_US
dc.contributor.authorLo, KFen_US
dc.date.accessioned2012-06-26T06:04:13Z-
dc.date.available2012-06-26T06:04:13Z-
dc.date.issued2006en_US
dc.identifier.citationCanadian Geotechnical Journal, 2006, v. 43 n. 11, p. 1180-1194en_US
dc.identifier.issn0008-3674en_US
dc.identifier.urihttp://hdl.handle.net/10722/150392-
dc.description.abstractIn this paper, bender elements are used as sensors to measure the damping ratio of soil by the spectral-ratio method. The results of numerical and physical experiments suggest that adequate measurement precision can be achieved by reducing the two types of inherent biases arising from (i) the near-field effect and (ii) the different transfer functions of the two receiver bender elements. The first bias can be avoided by setting sensors to r1/λ ≥ 2.0 and r1/r2 ≥ 2.0, where r1 and r2 are the distances between the source and the first and second receivers, respectively; and λ is the wavelength. The second bias can be minimized by modifying the original spectral-ratio method to accommodate the self-healing technique. The damping ratios, measured by this modified method, obtained from the experiment conducted in a tailor-made, true-triaxial apparatus are very similar to those obtained from resonant column tests under the same state of stress. © 2006 NRC Canada.en_US
dc.languageengen_US
dc.publisherNRC Research Press. The Journal's web site is located at http://pubs.nrc-cnrc.gc.ca/cgi-bin/rp/rp2_desc_e?cgjen_US
dc.relation.ispartofCanadian Geotechnical Journalen_US
dc.subjectBender Elementen_US
dc.subjectDamping Ratioen_US
dc.subjectNear-Field Effecten_US
dc.subjectSpectral-Ratio Methoden_US
dc.subjectTrue-Triaxial Apparatusen_US
dc.titleDamping-ratio measurements by the spectral-ratio methoden_US
dc.typeArticleen_US
dc.identifier.emailYan, WM:ryanyan@hku.hken_US
dc.identifier.authorityYan, WM=rp01400en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1139/T06-067en_US
dc.identifier.scopuseid_2-s2.0-33846946446en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33846946446&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume43en_US
dc.identifier.issue11en_US
dc.identifier.spage1180en_US
dc.identifier.epage1194en_US
dc.identifier.isiWOS:000243945700007-
dc.publisher.placeCanadaen_US
dc.identifier.scopusauthoridWang, YH=7601491411en_US
dc.identifier.scopusauthoridYan, WM=35369531200en_US
dc.identifier.scopusauthoridLo, KF=15846311100en_US

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