Simplified constitutive model for simulation of cyclic response of shallow foundations: Validation against laboratory tests

Anastasopoulos, I; Gelagoti, F; Kourkoulis, R; Gazetas, G

dc.contributor.author	Anastasopoulos, I	en
dc.contributor.author	Gelagoti, F	en
dc.contributor.author	Kourkoulis, R	en
dc.contributor.author	Gazetas, G	en
dc.date.accessioned	2014-03-01T02:14:37Z
dc.date.available	2014-03-01T02:14:37Z
dc.date.issued	2012	en
dc.identifier.issn	10900241	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/30071
dc.subject	Bearing capacity	en
dc.subject	Centrifuge experiments	en
dc.subject	Constitutive relations	en
dc.subject	Cyclic response	en
dc.subject	Experimental validation	en
dc.subject	Numerical method	en
dc.subject	Rocking foundation	en
dc.subject.other	Centrifuge experiments	en
dc.subject.other	Centrifuge tests	en
dc.subject.other	Commercial finite element codes	en
dc.subject.other	Constitutive relations	en
dc.subject.other	Cyclic loadings	en
dc.subject.other	Cyclic response	en
dc.subject.other	Engineering community	en
dc.subject.other	Engineering solutions	en
dc.subject.other	Experimental validations	en
dc.subject.other	Failure criteria	en
dc.subject.other	Kinematic hardening	en
dc.subject.other	Laboratory test	en
dc.subject.other	Large scale tests	en
dc.subject.other	Loose sands	en
dc.subject.other	Non-linear response	en
dc.subject.other	Numerical code	en
dc.subject.other	Pressure sensitive	en
dc.subject.other	Shallow foundations	en
dc.subject.other	Square footings	en
dc.subject.other	Two parameter	en
dc.subject.other	Ultimate resistance	en
dc.subject.other	User subroutine	en
dc.subject.other	Von Mises	en
dc.subject.other	Bearing capacity	en
dc.subject.other	Calibration	en
dc.subject.other	Centrifugation	en
dc.subject.other	Centrifuges	en
dc.subject.other	Codes (symbols)	en
dc.subject.other	Computer simulation	en
dc.subject.other	Constitutive models	en
dc.subject.other	Cyclic loads	en
dc.subject.other	Experiments	en
dc.subject.other	Foundations	en
dc.subject.other	Geologic models	en
dc.subject.other	Numerical methods	en
dc.subject.other	Soil testing	en
dc.subject.other	Finite element method	en
dc.subject.other	bearing capacity	en
dc.subject.other	centrifugal model test	en
dc.subject.other	constitutive equation	en
dc.subject.other	cyclic loading	en
dc.subject.other	footing	en
dc.subject.other	foundation	en
dc.subject.other	numerical method	en
dc.subject.other	numerical model	en
dc.subject.other	soil test	en
dc.subject.other	stiffness	en
dc.title	Simplified constitutive model for simulation of cyclic response of shallow foundations: Validation against laboratory tests	en
heal.type	journalArticle	en
heal.identifier.primary	10.1061/(ASCE)GT.1943-5606.0000534	en
heal.identifier.secondary	http://dx.doi.org/10.1061/(ASCE)GT.1943-5606.0000534	en
heal.publicationDate	2012	en
heal.abstract	The nonlinear response of shallow foundations has been studied experimentally and analytically. However, the engineering community is not yet convinced of the applicability of such concepts in practice. A key prerequisite is the ability to realistically model such effects. Although several sophisticated constitutive models are readily available in the literature, their use in practice is limited, because (1) they typically require extensive soil testing for calibration; (2) as they are implemented in highly specialized numerical codes, they are usually restricted to simple superstructures; and (3) in most cases, they can only be applied by numerical analysis specialists. Attempting to overcome some of these difficulties, this paper develops a simplified but fairly comprehensive constitutive model for analysis of the cyclic response of shallow foundations. On the basis of a kinematic hardening constitutive model with Von Mises failure criterion (readily available in commercial finite element codes), the model is made pressure sensitive and capable of reproducing both the low-strain stiffness and the ultimate resistance of clays and sands. Encoded in ABAQUS through a simple user subroutine, the model is validated against (a) centrifuge tests of shallow footings on clay under cyclic loading and (b) large-scale tests of a square footing on dense and loose sand under cyclic loading, conducted in the European Laboratory for Structural Analysis for the TRISEE project. The performance of the model is shown to be quite satisfactory, and discrepancies between theory and experiment are discussed and potential culprits are identified. Requiring calibration of only two parameters and being easily implemented in commercial FE codes, the model is believed to provide an easily applicable engineering solution. © 2011 American Society of Civil Engineers.	en
heal.journalName	Journal of Geotechnical and Geoenvironmental Engineering	en
dc.identifier.doi	10.1061/(ASCE)GT.1943-5606.0000534	en
dc.identifier.volume	137	en
dc.identifier.issue	12	en
dc.identifier.spage	1154	en
dc.identifier.epage	1168	en