000021828 001__ 21828
000021828 005__ 20170622131306.0
000021828 04107 $$aeng
000021828 046__ $$k2017-06-15
000021828 100__ $$aJalili, Javad
000021828 24500 $$aDYNAMIC ANALYSIS OF AN EMBANKMENT DAM MAKING USE OF INCREASED TIME STEPPING

000021828 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021828 260__ $$bNational Technical University of Athens, 2017
000021828 506__ $$arestricted
000021828 520__ $$2eng$$aSeismic design of embankment dams may include dynamic numerical analysis, which is commonly a time consuming task. The typically huge geometry of dams and relatively fine meshing required based on the input motion and geometry configurations, increase analyses costs. To avoid such computational severity, a previously defined convergence-based technique -which has successfully been utilized in numerous structural dynamic analyses- is examined in a geotechnical dynamic calculation. In this regard finite element analysis of an embankment dam located in a seismically active region is conducted using PLAXIS 2D 2016 code. The dam model is first evaluated by comparing the frequencies of initial natural vibration modes with those obtained from shear beam analysis. The strong ground motion events, recorded in the seismic zone were then selectively exerted on the dam via a set of primary dynamic analyses. To accurately model wave propogation, the calculation time step was defined small enogh based on material properties, element size and sampling frequency of digital records of input motion. The time-consuming primary analyses were then repeated, here called secondary analyses, making use of input motions digitized with larger time steps. The increase of time step size in these secondary analyses is based on a new convergence-based redefinition of digitized excitation technique. The results of the primary and secondary analyses are satisfactorily similar; the decrease of the computational cost is noticeable, while the sacrifice of precision is negligible.

000021828 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021828 653__ $$a

000021828 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021828 720__ $$aJalili, Javad$$iHoseini, Seyed Ehsan
000021828 8560_ $$ffischerc@itam.cas.cz
000021828 8564_ $$s116598$$uhttps://invenio.itam.cas.cz/record/21828/files/18094.pdf$$yOriginal version of the author's contribution as presented on CD, section: [MS17] Computational issues in earthquake engineering
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000021828 962__ $$r21500
000021828 980__ $$aPAPER