Cyclic lateral response of piles in dry sand: Finite element modeling and validation

Giannakos, S; Gerolymos, N; Gazetas, G

dc.contributor.author	Giannakos, S	en
dc.contributor.author	Gerolymos, N	en
dc.contributor.author	Gazetas, G	en
dc.date.accessioned	2014-03-01T02:08:35Z
dc.date.available	2014-03-01T02:08:35Z
dc.date.issued	2012	en
dc.identifier.issn	0266352X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29678
dc.subject	Centrifuge tests	en
dc.subject	Cyclic lateral loading	en
dc.subject	Inelastic pile response	en
dc.subject	Pile group efficiency	en
dc.subject	Pile-to-pile interaction	en
dc.subject	Piles	en
dc.subject	Plastic shakedown	en
dc.subject	Shadow effect	en
dc.subject.other	Centrifuge tests	en
dc.subject.other	Cyclic lateral loading	en
dc.subject.other	Pile groups	en
dc.subject.other	Pile response	en
dc.subject.other	Pile-to-pile interaction	en
dc.subject.other	Plastic shakedown	en
dc.subject.other	Shadow effects	en
dc.subject.other	Centrifuges	en
dc.subject.other	Cyclic loads	en
dc.subject.other	Densification	en
dc.subject.other	Loading	en
dc.subject.other	Soils	en
dc.subject.other	Three dimensional	en
dc.subject.other	Unloading	en
dc.subject.other	Piles	en
dc.subject.other	cyclic loading	en
dc.subject.other	finite element method	en
dc.subject.other	numerical model	en
dc.subject.other	pile group	en
dc.subject.other	pile response	en
dc.subject.other	sand	en
dc.subject.other	soil-structure interaction	en
dc.subject.other	stiffness	en
dc.subject.other	three-dimensional modeling	en
dc.title	Cyclic lateral response of piles in dry sand: Finite element modeling and validation	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.compgeo.2012.03.013	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.compgeo.2012.03.013	en
heal.publicationDate	2012	en
heal.abstract	The response of a vertical pile embedded in a dry dense sand when subjected to cyclic lateral loading is studied numerically. Three-dimensional finite element analyses with a new constitutive model of cyclic behavior of sand reproduce published centrifuge tests results. Three types of cyclic loading, two asymmetric and one symmetric are applied. Performance measure parameters (the normalized tangent and secant stiffnesses with respect to the first cycle of loading and the relative pile head displacement between two consecutive loading-unloading reversal points) are introduced to evaluate the results of the overall response of the pile-soil system. The results replicate the plastic shakedown response of the pile -soil system during cyclic loading, a response which is attributed to two mechanisms (a) soil densification and (b) "" system"" densification due to the gradual enlargement of the resisting soil mass to greater depths with cyclic loading. It is shown that the hardening mechanism of "" system"" densification dominates upon soil densification in cyclic loading. The response of a 1. ×. 2 pile group under cyclic lateral loading is also numerically investigated, emphasizing the role of cyclic loading on (a) the pile-to-pile interaction, (b) the additional pile distress due to the group effect, and (c) the shadow effect. © 2012 Elsevier Ltd.	en
heal.journalName	Computers and Geotechnics	en
dc.identifier.doi	10.1016/j.compgeo.2012.03.013	en
dc.identifier.volume	44	en
dc.identifier.spage	116	en
dc.identifier.epage	131	en