Parametric investigation of lateral spreading of gently sloping liquefied ground

Valsamis, AI; Bouckovalas, GD; Papadimitriou, AG

dc.contributor.author	Valsamis, AI	en
dc.contributor.author	Bouckovalas, GD	en
dc.contributor.author	Papadimitriou, AG	en
dc.date.accessioned	2014-03-01T01:34:06Z
dc.date.available	2014-03-01T01:34:06Z
dc.date.issued	2010	en
dc.identifier.issn	0267-7261	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20673
dc.subject	Bounding surface plasticity	en
dc.subject	Case history	en
dc.subject	Earthquake	en
dc.subject	Finite difference method	en
dc.subject	Lateral spreading	en
dc.subject	Liquefaction	en
dc.subject	Model test	en
dc.subject	Numerical analysis	en
dc.subject	Sand	en
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.other	Bounding surface plasticity	en
dc.subject.other	Case history	en
dc.subject.other	Lateral spreading	en
dc.subject.other	Model test	en
dc.subject.other	Model tests	en
dc.subject.other	Centrifugation	en
dc.subject.other	Centrifuges	en
dc.subject.other	Earthquakes	en
dc.subject.other	Mathematical models	en
dc.subject.other	Plasticity	en
dc.subject.other	Rock mechanics	en
dc.subject.other	Soil liquefaction	en
dc.subject.other	Surface measurement	en
dc.subject.other	Finite difference method	en
dc.subject.other	accuracy assessment	en
dc.subject.other	centrifugal model test	en
dc.subject.other	displacement	en
dc.subject.other	earthquake engineering	en
dc.subject.other	finite difference method	en
dc.subject.other	ground motion	en
dc.subject.other	liquefaction	en
dc.subject.other	model test	en
dc.subject.other	numerical model	en
dc.subject.other	parameterization	en
dc.subject.other	peak acceleration	en
dc.subject.other	plasticity	en
dc.subject.other	prediction	en
dc.subject.other	sandy soil	en
dc.subject.other	soil dynamics	en
dc.subject.other	strong motion	en
dc.title	Parametric investigation of lateral spreading of gently sloping liquefied ground	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.soildyn.2010.01.005	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.soildyn.2010.01.005	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	This paper investigates the main parameters affecting the anticipated maximum surface displacements due to earthquake-induced lateral spreading of mildly sloping ground. The main tool used for this purpose is a numerical methodology employing a bounding surface plasticity model implemented in a finite difference code, which has been thoroughly validated against 16 published centrifuge lateral spreading experiments. This study shows that important problem parameters are the mean ground (surface) acceleration, the duration of strong shaking following the onset of liquefaction, the corrected SPT blowcount, the depth to the sliding plane, the inclination of the ground surface and the fines content of the liquefied soil layers. A new approximate multi-variable relation is proposed for the estimation of ground surface displacements due to lateral spreading in gently sloping ground, which includes the foregoing parameters. The form of the relation builds upon sliding block theory, but its final formulation is based on statistical analysis of the input data and the results from 120 parametric analyses performed with the validated numerical methodology. Comparison of the predictions of the proposed relation for ground surface displacement against pertinent field data (from 256 case histories) and centrifuge test measurements shows satisfactory accuracy. Furthermore, the variation of lateral displacements with depth is explored and distinct displacement patterns are proposed for uniform, 2-layer and 4-layer ground profiles. (C) 2010 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.2010.01.005	en
dc.identifier.isi	ISI:000276257800007	en
dc.identifier.volume	30	en
dc.identifier.issue	6	en
dc.identifier.spage	490	en
dc.identifier.epage	508	en