000022315 001__ 22315
000022315 005__ 20170622150007.0
000022315 04107 $$aeng
000022315 046__ $$k2015-05-25
000022315 100__ $$aD'Avila, Maria Paola Santisi
000022315 24500 $$a1-DIRECTION 3-COMPONENT WAVE PROPAGATION VS NON-STATIONARY SYNTHETIC SIGNALS

000022315 24630 $$n5.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000022315 260__ $$bNational Technical University of Athens, 2015
000022315 506__ $$arestricted
000022315 520__ $$2eng$$aThe three components of downhole seismic records are simultaneously propagated along one direction, in a horizontal multilayered soil. The seismic response of surficial multilayered soils to strong earthquakes is evaluated using a multi-surface cyclic plasticity model of the Masing-Prandtl-Ishlinskii-Iwan (MPII) type in a finite element scheme. The major advantage of this constitutive model is that the rheology is characterized by few nonlinear parameters commonly available. Furthermore, the stress-strain behavior is nonlinear in loading and unloading. For the MPII model pure hysteretic dissipation is involved. 3-Component motion and stress-strain loops are evaluated all over the soil profiles. The numerical signal obtained at the surface is compared with the recorded ground motion, to validate the model. The same seismic zone is stochastically analyzed and probability distributions of relevant dynamic parameters are obtained. Synthetic signals are then generated by taking into account both the natural variability of the recorded ground motions and the joint time-frequency energy distribution of recorded accelerograms through a pertinent evolutionary non separable power spectral density matrix. Stochastic synthetic signals are compared with the numerical signals issued from wave propagation. Statistics of these two classes of computed signals are analyzed and compared with records at the surface. Comparisons are made through Anderson's criteria. This work compares the computed ground motions, obtained by wave propagation and stochastic analysis, with 3-Component seismic records from the Tohoku 2011 earthquake. Nonlinearity and coupling effects between components are incorporated in a different way. The advantages and drawbacks of each model are discussed. 

000022315 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000022315 653__ $$a

000022315 7112_ $$aCOMPDYN 2015 - 5th International Thematic Conference$$cCrete (GR)$$d2015-05-25 / 2015-05-27$$gCOMPDYN2015
000022315 720__ $$aD'Avila, Maria Paola Santisi$$iCacciola, Pierfrancesco
000022315 8560_ $$ffischerc@itam.cas.cz
000022315 8564_ $$s9862$$uhttps://invenio.itam.cas.cz/record/22315/files/C430_abstract.pdf$$yOriginal version of the author's contribution as presented on CD, section: 
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000022315 962__ $$r22030
000022315 980__ $$aPAPER