Sand fabric evolution effects on drain design for liquefaction mitigation

Bouckovalas, GD; Papadimitriou, AG; Niarchos, DG; Tsiapas, YT

dc.contributor.author	Bouckovalas, GD	en
dc.contributor.author	Papadimitriou, AG	en
dc.contributor.author	Niarchos, DG	en
dc.contributor.author	Tsiapas, YT	en
dc.date.accessioned	2014-03-01T01:36:43Z
dc.date.available	2014-03-01T01:36:43Z
dc.date.issued	2011	en
dc.identifier.issn	0267-7261	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21415
dc.subject	Cyclic Loading	en
dc.subject	Experimental Measurement	en
dc.subject	Numerical Simulation	en
dc.subject	Pore Pressure	en
dc.subject	Shaking Table Test	en
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.other	Analytical formulation	en
dc.subject.other	Analytical relations	en
dc.subject.other	Cyclic loadings	en
dc.subject.other	Design charts	en
dc.subject.other	Drain designs	en
dc.subject.other	Excess pore pressure	en
dc.subject.other	Experimental measurements	en
dc.subject.other	Loading condition	en
dc.subject.other	Partially drained	en
dc.subject.other	Quantitative assessments	en
dc.subject.other	Sand fabric	en
dc.subject.other	Shaking table tests	en
dc.subject.other	Undrained	en
dc.subject.other	Design	en
dc.subject.other	Liquefaction	en
dc.subject.other	Pore pressure	en
dc.subject.other	Sand	en
dc.subject.other	cyclic loading	en
dc.subject.other	drain	en
dc.subject.other	dynamic analysis	en
dc.subject.other	dynamic response	en
dc.subject.other	earthquake engineering	en
dc.subject.other	ground motion	en
dc.subject.other	liquefaction	en
dc.subject.other	numerical model	en
dc.subject.other	permeability	en
dc.subject.other	pore pressure	en
dc.subject.other	sand	en
dc.subject.other	seismic design	en
dc.subject.other	seismic response	en
dc.subject.other	structural analysis	en
dc.subject.other	structural response	en
dc.title	Sand fabric evolution effects on drain design for liquefaction mitigation	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.soildyn.2011.05.019	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.soildyn.2011.05.019	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	This paper revisits the seminal work of Seed and Booker (1977) [21] on the design of infinitely permeable drains for liquefaction mitigation. It is shown that their basic mathematical assumption for the rate of earthquake-induced excess pore pressure generation overlooks sand fabric evolution effects during cyclic loading and eventually leads to underestimation of the drain effectiveness. This is because such effects cause peak excess pore pressures to be attained at the early stages of partially drained shaking, followed by a gradual attenuation even if shaking continues undiminished, a response feature not predicted by the original formulation. In addition, special emphasis is given to the analytical relation describing the excess pore pressure build-up until liquefaction in undrained tests. This relation was considered unique in the original work, for reasons of simplicity, thus neglecting sand fabric evolution effects that may differentiate it for various sands, densities and loading conditions. Hence, a revised analytical formulation is proposed, which takes into account both above effects of sand fabric evolution. The paper provides a quantitative assessment of their influence on drain effectiveness and establishes a new set of charts for drain design. Experimental measurements from shaking table tests, as well as robust numerical simulations are shown, which underline the necessity for the revised solution and design charts. (C) 2011 Elsevier Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Soil Dynamics and Earthquake Engineering	en
dc.identifier.doi	10.1016/j.soildyn.2011.05.019	en
dc.identifier.isi	ISI:000293605000011	en
dc.identifier.volume	31	en
dc.identifier.issue	10	en
dc.identifier.spage	1426	en
dc.identifier.epage	1439	en