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Article: Cyclic behaviour and resistance of saturated sand under non-symmetrical loading conditions
Title | Cyclic behaviour and resistance of saturated sand under non-symmetrical loading conditions | ||||||
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Authors | |||||||
Keywords | Earthquakes Failure Laboratory Tests Liquefaction Sands Shear Strength | ||||||
Issue Date | 2011 | ||||||
Publisher | Thomas Telford Ltd. The Journal's web site is located at http://www.geotechnique-ice.com | ||||||
Citation | Geotechnique, 2011, v. 61 n. 1, p. 59-73 How to Cite? | ||||||
Abstract | This paper reports findings from an experimental study that aimed to investigate the undrained behaviour of sand in non-symmetrical cyclic loading, and to clarify the role of initial static shear in liquefaction resistance. The testing programme, conducted on a standard sand under triaxial conditions, covers a broad range of initial states in terms of relative density, confining stress and initial shear stress ratio (α). Three distinct failure modes have been identified from the tests: flow-type failure, cyclic mobility and plastic strain accumulation. Of these, flowtype failure, characterised by abrupt runaway deformations without any prior warning, is the most critical, and pertains to sand in the loose state. The tests also demonstrate that the presence of initial static shear stress is beneficial to the liquefaction resistance of loose sand at low α levels, but it becomes detrimental at high Φ levels. In this connection the concept of threshold α is proposed, together with the use of a no-stress-reversal line for better characterisation of the effect of initial static shear. Furthermore, in the conceptual framework of critical state soil mechanics, a fairly good linear relationship has been established between the threshold α and the state parameter Φ that collectively accounts for the initial relative density and mean stress level. This relationship suggests that the threshold α decreases with increasing values of Φ, or with sand becoming looser than the critical state. It is further proposed that the concept of threshold α also applies to sand at high relative density, as long as the confining stress becomes sufficiently high. This proposal leads to a unified and consistent interpretation of the complicated static shear effect. | ||||||
Persistent Identifier | http://hdl.handle.net/10722/150547 | ||||||
ISSN | 2023 Impact Factor: 4.2 2023 SCImago Journal Rankings: 1.791 | ||||||
ISI Accession Number ID |
Funding Information: The work presented in this paper was supported by the Research Grants Council of Hong Kong under grant number 719105. This support is gratefully acknowledged. The support of the University of Hong Kong through its Outstanding Young Researcher Award Programme is also highly acknowledged. | ||||||
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Yang, J | en_US |
dc.contributor.author | Sze, HY | en_US |
dc.date.accessioned | 2012-06-26T06:05:36Z | - |
dc.date.available | 2012-06-26T06:05:36Z | - |
dc.date.issued | 2011 | en_US |
dc.identifier.citation | Geotechnique, 2011, v. 61 n. 1, p. 59-73 | en_US |
dc.identifier.issn | 0016-8505 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/150547 | - |
dc.description.abstract | This paper reports findings from an experimental study that aimed to investigate the undrained behaviour of sand in non-symmetrical cyclic loading, and to clarify the role of initial static shear in liquefaction resistance. The testing programme, conducted on a standard sand under triaxial conditions, covers a broad range of initial states in terms of relative density, confining stress and initial shear stress ratio (α). Three distinct failure modes have been identified from the tests: flow-type failure, cyclic mobility and plastic strain accumulation. Of these, flowtype failure, characterised by abrupt runaway deformations without any prior warning, is the most critical, and pertains to sand in the loose state. The tests also demonstrate that the presence of initial static shear stress is beneficial to the liquefaction resistance of loose sand at low α levels, but it becomes detrimental at high Φ levels. In this connection the concept of threshold α is proposed, together with the use of a no-stress-reversal line for better characterisation of the effect of initial static shear. Furthermore, in the conceptual framework of critical state soil mechanics, a fairly good linear relationship has been established between the threshold α and the state parameter Φ that collectively accounts for the initial relative density and mean stress level. This relationship suggests that the threshold α decreases with increasing values of Φ, or with sand becoming looser than the critical state. It is further proposed that the concept of threshold α also applies to sand at high relative density, as long as the confining stress becomes sufficiently high. This proposal leads to a unified and consistent interpretation of the complicated static shear effect. | en_US |
dc.language | eng | en_US |
dc.publisher | Thomas Telford Ltd. The Journal's web site is located at http://www.geotechnique-ice.com | en_US |
dc.relation.ispartof | Geotechnique | en_US |
dc.rights | Permission is granted by ICE Publishing to print one copy for personal use. Any other use of these PDF files is subject to reprint fees | - |
dc.subject | Earthquakes | en_US |
dc.subject | Failure | en_US |
dc.subject | Laboratory Tests | en_US |
dc.subject | Liquefaction | en_US |
dc.subject | Sands | en_US |
dc.subject | Shear Strength | en_US |
dc.title | Cyclic behaviour and resistance of saturated sand under non-symmetrical loading conditions | en_US |
dc.type | Article | en_US |
dc.identifier.email | Yang, J:junyang@hkucc.hku.hk | en_US |
dc.identifier.authority | Yang, J=rp00201 | en_US |
dc.description.nature | published_or_final_version | en_US |
dc.identifier.doi | 10.1680/geot.9.P.019 | en_US |
dc.identifier.scopus | eid_2-s2.0-79551614383 | en_US |
dc.identifier.hkuros | 175401 | - |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-79551614383&selection=ref&src=s&origin=recordpage | en_US |
dc.identifier.volume | 61 | en_US |
dc.identifier.issue | 1 | en_US |
dc.identifier.spage | 59 | en_US |
dc.identifier.epage | 73 | en_US |
dc.identifier.eissn | 1751-7656 | - |
dc.identifier.isi | WOS:000286460400004 | - |
dc.publisher.place | United Kingdom | en_US |
dc.identifier.scopusauthorid | Yang, J=35605258800 | en_US |
dc.identifier.scopusauthorid | Sze, HY=35604955300 | en_US |
dc.identifier.issnl | 0016-8505 | - |