A critical state interpretation for the cyclic liquefaction resistance of silty sands

Bouckovalas, GD; Andrianopoulos, KI; Papadimitriou, AG

dc.contributor.author	Bouckovalas, GD	en
dc.contributor.author	Andrianopoulos, KI	en
dc.contributor.author	Papadimitriou, AG	en
dc.date.accessioned	2014-03-01T01:18:31Z
dc.date.available	2014-03-01T01:18:31Z
dc.date.issued	2003	en
dc.identifier.issn	0267-7261	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15055
dc.subject	Critical state	en
dc.subject	Cyclic loading	en
dc.subject	Earthquake	en
dc.subject	Liquefaction	en
dc.subject	Sand	en
dc.subject	Silt	en
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.other	Correlation methods	en
dc.subject.other	Elastoplasticity	en
dc.subject.other	Liquefaction	en
dc.subject.other	Mathematical models	en
dc.subject.other	Soil mechanics	en
dc.subject.other	Stresses	en
dc.subject.other	Data set	en
dc.subject.other	Sand	en
dc.subject.other	critical state	en
dc.subject.other	cyclic loading	en
dc.subject.other	earthquake	en
dc.subject.other	liquefaction	en
dc.subject.other	sand	en
dc.subject.other	silt	en
dc.title	A critical state interpretation for the cyclic liquefaction resistance of silty sands	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0267-7261(02)00156-2	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0267-7261(02)00156-2	en
heal.language	English	en
heal.publicationDate	2003	en
heal.abstract	Contrary to many laboratory investigations, common empirical correlations from in situ tests consider that the increase in the percentage of fines leads to an increase of the cyclic liquefaction resistance of sands. This paper draws upon the integrated Critical State Soil Mechanics framework in order to study this seemingly not univocal effect. Firstly the effect of fines on the Critical State Line (CSL) is studied through a statistical analysis of a large data set of published monotonic triaxial tests. The results show that increasing the content of non-plastic fines practically leads to a clockwise rotation of the CSL in (e-ln p) space. The implication of this effect on cyclic liquefaction resistance is subsequently evaluated with the aid of a properly calibrated critical state elasto-plastic constitutive model, as well as a large number of published experimental results and in situ empirical correlations. Both sets of data show clearly that a fines content, less than about 30% by weight, may prove beneficial at relatively small effective stresses (p<inf>0</inf> <50-70 kPa), such as the in situ stresses prevailing in most liquefaction case studies, and detrimental at larger confining stresses, i.e. the stresses usually considered in laboratory tests. To the extent of these findings, a correction factor is proposed for the practical evaluation of liquefaction resistance in terms of the fines content and the mean effective confining stress. © 2002 Elsevier Science Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Soil Dynamics and Earthquake Engineering	en
dc.identifier.doi	10.1016/S0267-7261(02)00156-2	en
dc.identifier.isi	ISI:000181023400003	en
dc.identifier.volume	23	en
dc.identifier.issue	2	en
dc.identifier.spage	115	en
dc.identifier.epage	125	en