000021961 001__ 21961
000021961 005__ 20170622131314.0
000021961 04107 $$aeng
000021961 046__ $$k2017-06-15
000021961 100__ $$aLesgidis, Nikolaos
000021961 24500 $$aEXPANSION OF THE LUMPED PARAMETER METHOD TO NONLINEAR, SOIL-STRUCTURE INTERACTING DYNAMIC SYSTEMS BY MEANS OF A MULTI-OBJECTIVE OPTIMIZATION ALGORITHM

000021961 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021961 260__ $$bNational Technical University of Athens, 2017
000021961 506__ $$arestricted
000021961 520__ $$2eng$$aThe computational demand of the soil-structure interaction (SSI) analysis for the design and assessment of structures as well as for the evaluation of life cycle cost and risk exposure has led the civil engineering community to the development of a variety of methods towards the model order reduction of the coupled soil-structure dynamic system. Different approaches have been proposed in the past as computationally efficient alternatives to the conventional FEM simulation of the complete structure-soil domain, such as the nonlinear lumped spring, the macroelement method and the substructure partition method. Yet, with few exceptions, no approach was capable of capturing simultaneously the frequencydependent dynamic properties along with the nonlinear behavior of the condensed segment of the overall soil-structure system, thus generating an imbalance between the modeling refinement achieved for the soil and the structure. To this end, a dual frequency- and intensitydependent expansion of the Lumped Parameter Modeling method is proposed in the current paper, materialized through a multi-objective algorithm, capable of closely approximating the behavior of the nonlinear dynamic system of the condensed segment. The efficiency of the proposed approach is validated for the case of an existing bridge, wherein the seismic response is comparatively assessed for both the proposed method and the detailed finite element model. The above expansion is deemed a computational efficient and reliable approach for simultaneously considering the frequency and amplitude dependence of soil-foundationsuperstructure effects in the framework of nonlinear response history analysis.

000021961 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021961 653__ $$asoil-structure interaction, lumped parameter modeling, model order reduction

000021961 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021961 720__ $$aLesgidis, Nikolaos$$iKwon, Oh-Sung$$iSextos, Anastasios
000021961 8560_ $$ffischerc@itam.cas.cz
000021961 8564_ $$s1336341$$uhttp://invenio.itam.cas.cz/record/21961/files/18474.pdf$$yOriginal version of the author's contribution as presented on CD, section: [MS13] Earthquake Soil Structure Interaction Modeling and Simulation
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000021961 962__ $$r21500
000021961 980__ $$aPAPER