000013362 001__ 13362
000013362 005__ 20161114160338.0
000013362 04107 $$aeng
000013362 046__ $$k2009-06-22
000013362 100__ $$aBouckovalas, G.
000013362 24500 $$aOn the numerical modeling of ground and foundation performance under severe seismic shaking and liquefaction

000013362 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013362 260__ $$bNational Technical University of Athens, 2009
000013362 506__ $$arestricted
000013362 520__ $$2eng$$aTo simulate ground and foundation performance under severe seismic shaking and liquefaction, an advanced plasticity model developed for monotonic and cyclic loading of non-cohesive soils has been implemented to the commercial finite-difference code FLAC, using its User-Defined-Model (UDM) capability. The new model incorporates the framework of Critical State Soil Mechanics, while it relies upon bounding surface plasticity with a vanished elastic region to simulate the non-linear soil response. Stress integration of constitutive relations is performed using a recently proposed explicit scheme with automatic error control and sub-stepping, which so far has been employed in the literature only for constitutive models aiming at static loading. The performance of the proposed numerical algorithm in complex boundary value problems involving earthquake-induced liquefaction has been evaluated, in terms of accuracy and computational cost, via a number of comparisons against the results of centrifuge tests simulating liquefaction effects, such as lateral spreading, bearing capacity degradation and settlement of surface footings, as well as lateral response of single piles.

000013362 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013362 653__ $$aautomatic substepping, bounding surface, critical state models, explicit integration, liquefaction, plasticity Abstract. To simulate ground and foundation performance under severe seismic shaking and liquefaction, an advanced plasticity model developed for monotonic and cyclic loading of non-cohesive soils has been implemented to the commercial finite-difference code FLAC, using its User-Defined-Model (UDM) capability. The new model incorporates the framework of Critical State Soil Mechanics, while it relies upon bounding surface plasticity with a vanished elastic region to simulate the non-linear soil response. Stress integration of constitutive relations is performed using a recently proposed explicit scheme with automatic error control and sub-stepping, which so far has been employed in the literature only for constitutive models aiming at static loading. The performance of the proposed numerical algorithm in complex boundary value problems involving earthquake-induced liquefaction has been evaluated, in terms of accuracy and computational cost, via a number of comparisons against the results of centrifuge tests simulating liquefaction effects, such as lateral spreading, bearing capacity degradation and settlement of surface footings, as well as lateral response of single piles.

000013362 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013362 720__ $$aBouckovalas, G.$$iAndrianopoulos K., I.$$iPapadimitriou A., G.
000013362 8560_ $$ffischerc@itam.cas.cz
000013362 8564_ $$s557867$$uhttps://invenio.itam.cas.cz/record/13362/files/CD535.pdf$$yOriginal version of the author's contribution as presented on CD, section: Computational methods in geotechnical earthquake engineering - i.
000013362 962__ $$r13074
000013362 980__ $$aPAPER