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Article: Cyclic behavior and liquefaction resistance of silty sands with presence of initial static shear stress

TitleCyclic behavior and liquefaction resistance of silty sands with presence of initial static shear stress
Authors
KeywordsCritical state theory
Cyclic loading
Initial shear stress
Liquefaction
Silty sands
Issue Date2019
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/soildyn
Citation
Soil Dynamics and Earthquake Engineering, 2019, v. 122, p. 274-289 How to Cite?
AbstractThe liquefaction resistance of silty sands and the potential effect of initial static shear stress are major concerns in seismic design of dams and embankments. This paper presents a systematic experimental study on non-plastic silty sands to address these concerns. It is shown that the concept of threshold α (αth) proposed by Yang and Sze (2011) to characterize the impact of α (representing the initial static shear stress level) on cyclic resistance (CRR) of clean sands is applicable to silty sands as well. When α < αth, CRR increases with increasing α, otherwise it decreases with increasing α. The threshold α is affected by the initial packing density, the initial effective confining pressure and the fines content. An improved state dependency of the threshold α, which is regardless of fines content, is proposed in the framework of critical state soil mechanics by using the state parameter (ψ). An analysis platform, known as CRR-ψ platform and developed based on clean sand data, is shown to have the capability of characterizing the state dependence of CRR for sands with varying fines contents. This platform in conjunction with the unified αth-ψ correlation provides a unified and consistent framework for understanding the complicated effects of initial static shear stress on soil liquefaction and for quantifying such effects for engineering practice.
Persistent Identifierhttp://hdl.handle.net/10722/273850
ISSN
2019 Impact Factor: 2.637
2015 SCImago Journal Rankings: 1.516

 

DC FieldValueLanguage
dc.contributor.authorWEI, X-
dc.contributor.authorYang, J-
dc.date.accessioned2019-08-18T14:49:50Z-
dc.date.available2019-08-18T14:49:50Z-
dc.date.issued2019-
dc.identifier.citationSoil Dynamics and Earthquake Engineering, 2019, v. 122, p. 274-289-
dc.identifier.issn0267-7261-
dc.identifier.urihttp://hdl.handle.net/10722/273850-
dc.description.abstractThe liquefaction resistance of silty sands and the potential effect of initial static shear stress are major concerns in seismic design of dams and embankments. This paper presents a systematic experimental study on non-plastic silty sands to address these concerns. It is shown that the concept of threshold α (αth) proposed by Yang and Sze (2011) to characterize the impact of α (representing the initial static shear stress level) on cyclic resistance (CRR) of clean sands is applicable to silty sands as well. When α < αth, CRR increases with increasing α, otherwise it decreases with increasing α. The threshold α is affected by the initial packing density, the initial effective confining pressure and the fines content. An improved state dependency of the threshold α, which is regardless of fines content, is proposed in the framework of critical state soil mechanics by using the state parameter (ψ). An analysis platform, known as CRR-ψ platform and developed based on clean sand data, is shown to have the capability of characterizing the state dependence of CRR for sands with varying fines contents. This platform in conjunction with the unified αth-ψ correlation provides a unified and consistent framework for understanding the complicated effects of initial static shear stress on soil liquefaction and for quantifying such effects for engineering practice.-
dc.languageeng-
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/soildyn-
dc.relation.ispartofSoil Dynamics and Earthquake Engineering-
dc.subjectCritical state theory-
dc.subjectCyclic loading-
dc.subjectInitial shear stress-
dc.subjectLiquefaction-
dc.subjectSilty sands-
dc.titleCyclic behavior and liquefaction resistance of silty sands with presence of initial static shear stress-
dc.typeArticle-
dc.identifier.emailYang, J: junyang@hkucc.hku.hk-
dc.identifier.authorityYang, J=rp00201-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.soildyn.2018.11.029-
dc.identifier.scopuseid_2-s2.0-85065518662-
dc.identifier.hkuros301882-
dc.identifier.volume122-
dc.identifier.spage274-
dc.identifier.epage289-
dc.publisher.placeUnited Kingdom-

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