Bounding surface plasticity model for the seismic liquefaction analysis of geostructures

Andrianopoulos, KI; Papadimitriou, AG; Bouckovalas, GD

dc.contributor.author	Andrianopoulos, KI	en
dc.contributor.author	Papadimitriou, AG	en
dc.contributor.author	Bouckovalas, GD	en
dc.date.accessioned	2014-03-01T01:32:58Z
dc.date.available	2014-03-01T01:32:58Z
dc.date.issued	2010	en
dc.identifier.issn	0267-7261	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20251
dc.subject	Boundary Value Problem	en
dc.subject	Constitutive Relation	en
dc.subject	Critical State	en
dc.subject	Model Development	en
dc.subject	Reference Point	en
dc.subject	Seismic Response	en
dc.subject	Soil Mechanics	en
dc.subject	Strain Rate	en
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.other	Bounding surface plasticity	en
dc.subject.other	Bounding surface plasticity model	en
dc.subject.other	Calibration procedure	en
dc.subject.other	Centrifuge tests	en
dc.subject.other	Constitutive relations	en
dc.subject.other	Critical state	en
dc.subject.other	Current stress	en
dc.subject.other	Directional effects	en
dc.subject.other	Elastic region	en
dc.subject.other	Empirical index	en
dc.subject.other	Geostructures	en
dc.subject.other	Inter-dependences	en
dc.subject.other	Model constants	en
dc.subject.other	Model surface	en
dc.subject.other	New model	en
dc.subject.other	Non-linear	en
dc.subject.other	Non-Linearity	en
dc.subject.other	Plastic modulus	en
dc.subject.other	Plasticity model	en
dc.subject.other	Ramberg-osgood	en
dc.subject.other	Reference points	en
dc.subject.other	Rigid foundation	en
dc.subject.other	Sand fabric	en
dc.subject.other	Seismic liquefaction	en
dc.subject.other	Soil response	en
dc.subject.other	State parameters	en
dc.subject.other	Centrifugation	en
dc.subject.other	Computer simulation	en
dc.subject.other	Critical current density (superconductivity)	en
dc.subject.other	Plasticity	en
dc.subject.other	Sand	en
dc.subject.other	Seismology	en
dc.subject.other	Slip forming	en
dc.subject.other	Soil liquefaction	en
dc.subject.other	Soil mechanics	en
dc.subject.other	Soils	en
dc.subject.other	Strain rate	en
dc.subject.other	Geologic models	en
dc.subject.other	computer simulation	en
dc.subject.other	liquefaction	en
dc.subject.other	modeling	en
dc.subject.other	plasticity	en
dc.subject.other	seismic response	en
dc.subject.other	seismicity	en
dc.subject.other	soil mechanics	en
dc.subject.other	strain rate	en
dc.subject.other	Nevada	en
dc.subject.other	United States	en
dc.title	Bounding surface plasticity model for the seismic liquefaction analysis of geostructures	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.soildyn.2010.04.001	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.soildyn.2010.04.001	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	This paper presents the constitutive relations and the simulative potential of a new plasticity model developed mainly for the seismic liquefaction analysis of geostructures. The model incorporates the framework of critical state soil mechanics, while it relies on bounding surface plasticity with a vanished elastic region to simulate the non-linear soil response. Key constitutive ingredients of the new model are: (a) the inter-dependence of the critical state, the bounding and the dilatancy (open cone) surfaces on the basis of the state parameter psi, (b) a (Ramberg-Osgood type) non-linear hysteretic formulation for the "elastic" strain rate, (c) a discontinuously relocatable stress projection center related to the "last" load reversal point, which is used for mapping the current stress point on model surfaces and as a reference point for introducing non-linearity in the "elastic" strain rate and finally (d) an empirical index of the directional effect of sand fabric evolution during shearing, which scales the plastic modulus. In addition, the paper outlines the calibration procedure for the model constants, and exhibits its accuracy on the basis of a large number of laboratory element tests on Nevada sand. More importantly, the paper explores the potential of the new model by presenting simulations of the VELACS centrifuge tests of Models No 1 and 12, which refer to the free-field liquefaction response of Nevada sand and the seismic response of a rigid foundation on the same sand, respectively. These simulations show that the new model can be used successfully for the analysis of widely different boundary value problems involving earthquake soil liquefaction, with the same set of model constants calibrated on the basis of laboratory element tests. (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.2010.04.001	en
dc.identifier.isi	ISI:000280986400003	en
dc.identifier.volume	30	en
dc.identifier.issue	10	en
dc.identifier.spage	895	en
dc.identifier.epage	911	en