000021663 001__ 21663
000021663 005__ 20170622131258.0
000021663 04107 $$aeng
000021663 046__ $$k2017-06-15
000021663 100__ $$aConti, Riccardo
000021663 24500 $$aQUASI-KINEMATIC RESPONSE OF EMBEDDED FOUNDATIONS: EVIDENCE OF FOUNDATION MASS EFFECT FROM NUMERICAL ANALYSES AND INSTRUMENTED STRUCTURES

000021663 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021663 260__ $$bNational Technical University of Athens, 2017
000021663 506__ $$arestricted
000021663 520__ $$2eng$$aExperimental and theoretical studies on soil-structure interaction (SSI) have demonstrated that the seismic motion imposed at the foundation of a structure may be different from the free-field motion due to the filtering action exerted by the foundation. In the realm of the substructure approach, the above kinematic interaction effect is investigated by disregarding the foundation mass. However, in the case of massive foundations supporting high-rise and/or wide plan view buildings or large monumental structures, foundation mass may contribute to the final input motion. This paper investigates the role of the foundation mass on the filtering action of embedded foundations by means of FDM numerical analyses. New analytical expressions of quasi-kinematic interaction factors are proposed, allowing for a direct implementation in analysis or design of massive foundations. The role of salient model parameters, such as the soil-to-foundation mass density ratio, the dimensionless frequency of the input motion and the aspect ratio of the foundation, is explored. The proposed analytical model is then compared with earthquake recordings from two accelerometric stations, maintained by ITSAK, that are installed at the free-field and at the basement of a nearby instrumented building with a massive embedded foundation.

000021663 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021663 653__ $$aMassive foundations, kinematic interaction factors, numerical FDM analyses, earthquake recordings.

000021663 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021663 720__ $$aConti, Riccardo$$iKarakostas, Christos$$iTheodoulidis, Nikos$$iRovithis, Emmanouil$$iViggiani, Giulia$$iMorigi, Marco
000021663 8560_ $$ffischerc@itam.cas.cz
000021663 8564_ $$s755631$$uhttps://invenio.itam.cas.cz/record/21663/files/17424.pdf$$yOriginal version of the author's contribution as presented on CD, section: [MS16] Instrumentation of structures and SSI systems under dynamic excitations
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000021663 962__ $$r21500
000021663 980__ $$aPAPER