000013510 001__ 13510
000013510 005__ 20161114165556.0
000013510 04107 $$aeng
000013510 046__ $$k2011-05-25
000013510 100__ $$aFerro A., Nieto
000013510 24500 $$aHybrid Laplace-Time Domain Approach for Nonlinear Dynamic Soil-Structure Interaction Problems

000013510 24630 $$n3.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013510 260__ $$bNational Technical University of Athens, 2011
000013510 506__ $$arestricted
000013510 520__ $$2eng$$aNonlinear dynamic soil-structure interaction problems are usually solved by a substructuring technique where the soil-structure system is decomposed into two sub-domains: the nonlinear structure, which can also include a part of the soil showing a nonlinear behavior, and the linear unbounded soil. The present work considers the case where the problem is localized on the building. The effects of the unbounded soil are then represented as a particular type of boundary condition by means of the so-called impedance operator, assumed to be known in the Laplace domain. In this framework, since nonlinearities are taken into account, the problem has to be solved in the time domain. Consequently, the interaction forces are expressed in terms of the Laplace-domain impedance results as a convolution integral between the time impedance coefficients and the nodal displacements located on the interface. In order to compute this convolution product a hybrid Laplace-time domain approach based on a Convolution Quadrature Method is introduced. It allows to express this convolution not only in terms of displacements but also in terms of accelerations and velocities convolutions. The proposed method is finally tested on a soil-structure application modeled with a lumped-parameter system. Satisfactory results are obtained when an elasto-plastic behaviour is accounted for.

000013510 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013510 653__ $$aDynamic soil-structure interaction, impedance matrix, hybrid Laplace-time domain approach, Convolution Quadrature Method, nonlinear analysis.

000013510 7112_ $$aCOMPDYN 2011 - 3rd International Thematic Conference$$cIsland of Corfu (GR)$$d2011-05-25 / 2011-05-28$$gCOMPDYN2011
000013510 720__ $$aFerro A., Nieto$$iClouteau, D.$$iGreffet, N.$$iDevesa, G.
000013510 8560_ $$ffischerc@itam.cas.cz
000013510 8564_ $$s441828$$uhttps://invenio.itam.cas.cz/record/13510/files/216.pdf$$yOriginal version of the author's contribution as presented on CD, section: MS 10 Dynamic Soil-Structure Interaction.
000013510 962__ $$r13401
000013510 980__ $$aPAPER