Numerical modeling of centrifuge cyclic lateral pile load experiments

Gerolymos, N; Escoffier, S; Gazetas, G; Garnier, J

dc.contributor.author	Gerolymos, N	en
dc.contributor.author	Escoffier, S	en
dc.contributor.author	Gazetas, G	en
dc.contributor.author	Garnier, J	en
dc.date.accessioned	2014-03-01T01:31:25Z
dc.date.available	2014-03-01T01:31:25Z
dc.date.issued	2009	en
dc.identifier.issn	1671-3664	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19799
dc.subject	Centrifuge test	en
dc.subject	Cyclic loading	en
dc.subject	Experimental validation	en
dc.subject	Nonlinear response	en
dc.subject	P-y curves	en
dc.subject	Pile-soil separation/gapping	en
dc.subject	Winkler model	en
dc.subject.classification	Engineering, Civil	en
dc.subject.classification	Engineering, Geological	en
dc.subject.other	Centrifugation	en
dc.subject.other	Centrifuges	en
dc.subject.other	Cyclic loads	en
dc.subject.other	Loading	en
dc.subject.other	Nonlinear control systems	en
dc.subject.other	Pile foundations	en
dc.subject.other	Piles	en
dc.subject.other	Soils	en
dc.subject.other	Stiffness	en
dc.subject.other	Testing	en
dc.subject.other	Centrifuge test	en
dc.subject.other	Cyclic loading	en
dc.subject.other	Experimental validation	en
dc.subject.other	Nonlinear response	en
dc.subject.other	P-y curves	en
dc.subject.other	Pile-soil separation/gapping	en
dc.subject.other	Winkler model	en
dc.subject.other	Geologic models	en
dc.title	Numerical modeling of centrifuge cyclic lateral pile load experiments	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/s11803-009-9005-8	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s11803-009-9005-8	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	To gain insight into the inelastic behavior of piles, the response of a vertical pile embedded in dry sand and subjected to cyclic lateral loading was studied experimentally in centrifuge tests conducted in Laboratoire Central des Ponts et Chaussées. Three types of cyclic loading were applied, two asymmetric and one symmetric with respect to the unloaded pile. An approximately square-root variation of soil stiffness with depth was obtained from indirect in-flight density measurements, laboratory tests on reconstituted samples, and well-established empirical correlations. The tests were simulated using a cyclic nonlinear Winkler spring model, which describes the full range of inelastic phenomena, including separation and re-attachment of the pile from and to the soil. The model consists of three mathematical expressions capable of reproducing a wide variety of monotonic and cyclic experimental p-y curves. The physical meaning of key model parameters is graphically explained and related to soil behavior. Comparisons with the centrifuge test results demonstrate the general validity of the model and its ability to capture several features of pile-soil interaction, including: soil plastification at an early stage of loading, ""pinching"" behavior due to the formation of a relaxation zone around the upper part of the pile, and stiffness and strength changes due to cyclic loading. A comparison of the p-y curves derived from the test results and the proposed model, as well as those from the classical curves of Reese et al. (1974) for sand, is also presented. © 2009 Institute of Engineering Mechanics, China Earthquake Administration and Springer-Verlag GmbH.	en
heal.publisher	SPRINGER	en
heal.journalName	Earthquake Engineering and Engineering Vibration	en
dc.identifier.doi	10.1007/s11803-009-9005-8	en
dc.identifier.isi	ISI:000264519100005	en
dc.identifier.volume	8	en
dc.identifier.issue	1	en
dc.identifier.spage	61	en
dc.identifier.epage	76	en