000013239 001__ 13239
000013239 005__ 20161114160333.0
000013239 04107 $$aeng
000013239 046__ $$k2009-06-22
000013239 100__ $$aJeremic, B.
000013239 24500 $$aDirecting energy dissipation in earthquake-soil-structure systems

000013239 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013239 260__ $$bNational Technical University of Athens, 2009
000013239 506__ $$arestricted
000013239 520__ $$2eng$$aLocation and timing of dissipation of incoming seismic energy during earthquakes determines amount and type of damage a soil-structure system will sustain. For example, if much of incoming energy is dissipated in the structure, significant structural damage can be expected, resulting in possible collapse of structural components or complete structure. Damage to structure (or components) might result in change of dynamic characteristics of the structural system. On the other hand, if much of incoming energy is dissipated in the soil, structure might sustain only minor damage (if any) while soil might densify, resulting in change to its dynamic characteristic as well. The interplay of (evolving) dynamic characteristics of earthquake, soil and structure (ESS) and the timing of such evolution will determine eventual fate of structural system. Of particular interest is the notion that energy dissipation location and timing controls eventual damage and/or failure of soil-structure systems. Observation from recent earthquakes substantiates above energy dissipation hypothesis. Presented here is detailed, high fidelity modeling and simulation of ESS systems that is used to investigate energy dissipation hypothesis. Described in some detail will be modeling of both displacement proportional (elasto-plasticity) and velocity proportional (viscous) energy dissipation mechanisms and their timing. Main focus of presentation is on systematic analysis of how energy dissipation at various spatial locations, using different dissipation mechanisms and at different times contributes to dynamic response of soil-structure system. Moreover, it will be proposed that directing energy dissipation process, through passive and active control of soil, can be used to improve soilstructure system response to seismic excitation. A number of example earthquake-soil-structure system simulations will be presented, illustrating interplay of ESS dynamic characteristics (in space and time) and energy dissipation mechanisms and their influence on beneficial and/or detrimental effects on soil-structure systems.

000013239 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013239 653__ $$a

000013239 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013239 720__ $$aJeremic, B.
000013239 8560_ $$ffischerc@itam.cas.cz
000013239 8564_ $$s51081$$uhttps://invenio.itam.cas.cz/record/13239/files/CD351.pdf$$yOriginal version of the author's contribution as presented on CD, section: Semi-plenary lectures.
000013239 962__ $$r13074
000013239 980__ $$aPAPER