Interaction of foundation-structure systems with seismically precarious slopes: Numerical analysis with strain softening constitutive model

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

dc.contributor.author	Kourkoulis, R	en
dc.contributor.author	Anastasopoulos, I	en
dc.contributor.author	Gelagoti, F	en
dc.contributor.author	Gazetas, G	en
dc.date.accessioned	2014-03-01T01:33:39Z
dc.date.available	2014-03-01T01:33:39Z
dc.date.issued	2010	en
dc.identifier.issn	0267-7261	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20513
dc.subject	Constitutive Model	en
dc.subject	Finite Element	en
dc.subject	Limit Analysis	en
dc.subject	Numerical Analysis	en
dc.subject	Shear Zone	en
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.other	A-frames	en
dc.subject.other	Base excitation	en
dc.subject.other	Beam elements	en
dc.subject.other	Combined effect	en
dc.subject.other	Differential displacements	en
dc.subject.other	Foundation slab	en
dc.subject.other	Frame columns	en
dc.subject.other	GAP elements	en
dc.subject.other	Gravitational forces	en
dc.subject.other	Ground-shaking	en
dc.subject.other	Isolated footings	en
dc.subject.other	Limit analysis methods	en
dc.subject.other	Limiting equilibrium	en
dc.subject.other	Non-linear finite elements	en
dc.subject.other	Plane-strain	en
dc.subject.other	Plastic shear	en
dc.subject.other	Post-peak	en
dc.subject.other	Pseudostatic	en
dc.subject.other	Seismic coefficient	en
dc.subject.other	Seismic event	en
dc.subject.other	Sliding surface	en
dc.subject.other	Slip surfaces	en
dc.subject.other	Slope crest	en
dc.subject.other	Slope failure	en
dc.subject.other	Softening behavior	en
dc.subject.other	Soil constitutive model	en
dc.subject.other	Soil layer	en
dc.subject.other	Strain softening	en
dc.subject.other	Structure systems	en
dc.subject.other	Superstructure columns	en
dc.subject.other	Yield accelerations	en
dc.subject.other	Constitutive models	en
dc.subject.other	Geologic models	en
dc.subject.other	Numerical analysis	en
dc.subject.other	Seismology	en
dc.subject.other	Slope stability	en
dc.subject.other	Soils	en
dc.subject.other	Structural members	en
dc.subject.other	Foundations	en
dc.subject.other	column	en
dc.subject.other	dynamic analysis	en
dc.subject.other	earthquake trigger	en
dc.subject.other	finite element method	en
dc.subject.other	foundation	en
dc.subject.other	ground motion	en
dc.subject.other	landslide	en
dc.subject.other	mathematical analysis	en
dc.subject.other	numerical model	en
dc.subject.other	plane strain	en
dc.subject.other	seismic design	en
dc.subject.other	shear zone	en
dc.subject.other	softening	en
dc.title	Interaction of foundation-structure systems with seismically precarious slopes: Numerical analysis with strain softening constitutive model	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.soildyn.2010.05.001	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.soildyn.2010.05.001	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	This paper studies the combined effects of earthquake-triggered landslides and ground shaking on foundation-structure systems founded near slope crests. Plane-strain nonlinear finite element dynamic analyses are performed. The soil constitutive model is calibrated against published data to simulate the (post-peak) softening behavior of soil during a seismic event and under the action of gravitational forces. The plastic shear zones and the yield accelerations obtained from our dynamic analyses are shown to be consistent with the slip surfaces and the seismic coefficients obtained by classical pseudostatic limiting equilibrium and limit analysis methods. The foundation and frame columns and beams are modeled as flexural beam elements, while the possibility of sliding and detachment (separation) between the foundation and the underlying soil is considered through the use of special frictional gap elements. The effects of foundation type (isolated footings versus a rigid raft) on the position of the sliding surface, on the foundation total and differential displacements, and on the distress of the foundation slab and superstructure columns, are explored parametrically. It is shown that a frame structure founded on a properly designed raft could survive the combined effects of slope failure and ground shaking, even if the latter is the result of a strong base excitation amplified by the soil layer and slope topography. (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.2010.05.001	en
dc.identifier.isi	ISI:000282497000002	en
dc.identifier.volume	30	en
dc.identifier.issue	12	en
dc.identifier.spage	1430	en
dc.identifier.epage	1445	en