000022354 001__ 22354
000022354 005__ 20170622150009.0
000022354 04107 $$aeng
000022354 046__ $$k2015-05-25
000022354 100__ $$aNieto-Ferro, Alex
000022354 24500 $$aACCOUNTING FOR NONLINEAR SOIL WITHIN DYNAMIC SOIL-STRUCTURE INTERACTION CALCULATIONS IN EARTHQUAKE ENGINEERING

000022354 24630 $$n5.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000022354 260__ $$bNational Technical University of Athens, 2015
000022354 506__ $$arestricted
000022354 520__ $$2eng$$aThe performance of more accurate simulations that account for new physical phenomena at stake arises as an interesting way for the assessment of structural seismic resistance. In this framework, the present work deals with the numerical modelling of nonlinear dynamic soil-structure interaction. Dynamic soil-structure interaction problems are usually solved using a sub-structuring technique where the soil-structure system is decomposed into two sub-domains: the nonlinear superstructure and the linear (visco)-elastic unbounded soil. The superstructure might include, in addition to the actual structure, a part of soil showing a nonlinear behaviour. To address this problem, a BEM-FEM coupling strategy is adopted in this work. On one hand, the superstructure is modelled by a FE method which enables to account for nonlinear constitutive laws as well as complex geometries in a straightforward way. Besides, the problem within the superstructure is formulated in the time domain. On the other hand, the interaction forces coming from the linear unbounded soil are represented by means of an impedance operator defined on the soil-superstructure interface and computed with a Laplace-domain BE method. This hybrid Laplace-time domain approach [1], which contrasts with more classical frequency-based formulations [2], uses convolution quadratures-based techniques [3] to evaluate the interaction forces in the time domain. In order to bring out the main features of this approach, a nonlinear application is assessed and compared to a full-FEM solution. It deals with a 3D model of a reinforced concrete building founded on a nonlinear soil. A global damage constitutive law is chosen for the structure [4]. The elasto-plastic soil Hujeux constitutive law [5], well-adapted for cyclic loadings, is adopted for the soil. 

000022354 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000022354 653__ $$a

000022354 7112_ $$aCOMPDYN 2015 - 5th International Thematic Conference$$cCrete (GR)$$d2015-05-25 / 2015-05-27$$gCOMPDYN2015
000022354 720__ $$aNieto-Ferro, Alex$$iCaudron, Matthieu$$iGreffet, Nicolas$$iDévesa, Georges
000022354 8560_ $$ffischerc@itam.cas.cz
000022354 8564_ $$s10333$$uhttps://invenio.itam.cas.cz/record/22354/files/C584_abstract.pdf$$yOriginal version of the author's contribution as presented on CD, section: 
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000022354 962__ $$r22030
000022354 980__ $$aPAPER