Application of an anisotropic constitutive model for structured clay to seismic slope stability

Taiebat, M; Kaynia, AM; Dafalias, YF

dc.contributor.author	Taiebat, M	en
dc.contributor.author	Kaynia, AM	en
dc.contributor.author	Dafalias, YF	en
dc.date.accessioned	2014-03-01T01:35:19Z
dc.date.available	2014-03-01T01:35:19Z
dc.date.issued	2011	en
dc.identifier.issn	1090-0241	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20996
dc.subject	Anisotropy	en
dc.subject	Constitutive model	en
dc.subject	Destructuration	en
dc.subject	Numerical modeling	en
dc.subject	Seismic slope stability	en
dc.subject	Structured clay	en
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.other	Benchmark comparison	en
dc.subject.other	Clay slopes	en
dc.subject.other	Destructuration	en
dc.subject.other	Engineering parameters	en
dc.subject.other	Finite difference	en
dc.subject.other	Model parameters	en
dc.subject.other	Modified Cam-clay model	en
dc.subject.other	Numerical modeling	en
dc.subject.other	Real applications	en
dc.subject.other	Seismic slope	en
dc.subject.other	Simulation model	en
dc.subject.other	Slope-stability problems	en
dc.subject.other	Structured clay	en
dc.subject.other	Three-dimensional (3D)	en
dc.subject.other	Undrained shear strength	en
dc.subject.other	Yield accelerations	en
dc.subject.other	Anisotropy	en
dc.subject.other	Clay deposits	en
dc.subject.other	Constitutive models	en
dc.subject.other	Earthquakes	en
dc.subject.other	Embankment dams	en
dc.subject.other	Shear strength	en
dc.subject.other	Slope stability	en
dc.subject.other	Three dimensional	en
dc.subject.other	Geologic models	en
dc.subject.other	Cam-clay model	en
dc.subject.other	clay soil	en
dc.subject.other	constitutive equation	en
dc.subject.other	numerical model	en
dc.subject.other	seismicity	en
dc.subject.other	shear strength	en
dc.subject.other	slope dynamics	en
dc.subject.other	slope stability	en
dc.title	Application of an anisotropic constitutive model for structured clay to seismic slope stability	en
heal.type	journalArticle	en
heal.identifier.primary	10.1061/(ASCE)GT.1943-5606.0000458	en
heal.identifier.secondary	http://dx.doi.org/10.1061/(ASCE)GT.1943-5606.0000458	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	The anisotropic nature of response and degradation of shear strength from the undisturbed condition to the remolded state are two fundamental and challenging aspects of response in some clay deposits. This paper presents a comprehensive, yet flexible and practical, version of the SANICLAY model and its application to a seismic slope-stability problem. The model is based on the well-known isotropic modified Cam-Clay model with two additional mechanisms to account for anisotropy and destructuration. The model has been efficiently implemented in a three-dimensional (3D) continuum, coupled, dynamic, finite-difference program. The program has been used to analyze the seismic response of clay slopes to gain better insight into the role of the previously mentioned parameters in real applications. Different aspects of the model, including anisotropy and destructuration, and their effects on the earthquake-induced strains and deformations in the slope have then been explored and presented. By providing a link between the model parameters and the soil's undrained shear strength, which is a well-known engineering parameter, a benchmark comparison has been made between the results of the present advanced model and those of an engineering approach. To this end, a modified Newmark sliding-block analysis has been used, in which the yield acceleration is gradually reduced as block sliding progresses during the earthquake. It is observed that although the two analyses display the same trends, the modified Newmark sliding-block method provides conservative results compared with those obtained from the developed simulation model. DOI: 10.1061/(ASCE)GT.1943-5606.0000458. (c) 2011 American Society of Civil Engineers.	en
heal.publisher	ASCE-AMER SOC CIVIL ENGINEERS	en
heal.journalName	Journal of Geotechnical and Geoenvironmental Engineering	en
dc.identifier.doi	10.1061/(ASCE)GT.1943-5606.0000458	en
dc.identifier.isi	ISI:000290452700004	en
dc.identifier.volume	137	en
dc.identifier.issue	5	en
dc.identifier.spage	492	en
dc.identifier.epage	504	en