000013607 001__ 13607
000013607 005__ 20161114165848.0
000013607 04107 $$aeng
000013607 046__ $$k2011-05-25
000013607 100__ $$aNateghi, F.
000013607 24500 $$aOn Less Computational Costs for Analysis of Silos Seismic Behavior by Time Integration

000013607 24630 $$n3.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013607 260__ $$bNational Technical University of Athens, 2011
000013607 506__ $$arestricted
000013607 520__ $$2eng$$aTime integration is the most versatile tool for analyzing semi-discretized equations of motion. Nevertheless, the associated computational costs are generally high and the computed responses are approximate. Integration step size is the main parameter affecting the computational cost and accuracy, in different ways; and hence, should be set equal to the largest value, acceptable from the point of view of accuracy. For practical cases, subjected to digitized excitations, an additional restriction, potentially increasing the computational costs, is the digitization size of the recorded excitations. Recently, a technique uses a convergencebased replacement of the digitized excitations with excitations digitized at larger steps, to arrive at time integration analyses in need of less computational cost. The good performance of the proposed technique regarding simple linear and nonlinear structural dynamic systems and shear frame structures has been displayed. Considering these, the importance of time history analysis in seismic analyses, the fact that the sizes and complicatedness of structural systems are in increase and the earthquakes are likely being recorded in smaller steps everyday, and meanwhile, the strategical role of silos in most of countries, the objective in this paper is to study the effectiveness of the new technique, when applied to analysis of silos seismic behaviors. After brief theoretical discussion, a steel silo designed based on existing codes, is once analyzed without implementing the technique, and then again, when implementing it, considering 80 percent of the mass of granular material inside silo as the effective mass. The numerical results clearly evidence the good performance of the technique.

000013607 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013607 653__ $$aTime Integration, Steel Silo, Computational Cost, Earthquake Excitation.

000013607 7112_ $$aCOMPDYN 2011 - 3rd International Thematic Conference$$cIsland of Corfu (GR)$$d2011-05-25 / 2011-05-28$$gCOMPDYN2011
000013607 720__ $$aNateghi, F.$$iYakhchalian, M.
000013607 8560_ $$ffischerc@itam.cas.cz
000013607 8564_ $$s498046$$uhttp://invenio.itam.cas.cz/record/13607/files/364.pdf$$yOriginal version of the author's contribution as presented on CD, section: MS 01 Accuracy and Computational Efficiency in Seismic Structural Analysis.
000013607 962__ $$r13401
000013607 980__ $$aPAPER