000015538 001__ 15538
000015538 005__ 20161115135322.0
000015538 04107 $$aeng
000015538 046__ $$k2013-06-12
000015538 100__ $$aKouroussis, G.
000015538 24500 $$aThree-Dimensional Finite Element Modelling of Dynamic Pile-Soil-Pile Interaction in Time Domain

000015538 24630 $$n34.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000015538 260__ $$bNational Technical University of Athens, 2013
000015538 506__ $$arestricted
000015538 520__ $$2eng$$aDynamic analysis of embedded foundations like pile groups have received considerable attention in the past. Most existing approaches are established in the frequency domain, not allowing the simulation of material and geometric nonlinearities. In this paper, transient analyses are conducted to calculate the impedance of piles and pile groups, using a full three-dimensional numerical model for both the soil and the structure. Based on a combined viscous boundary and infinite elements, defining an efficient non-reflecting boundary, a finite element model is developed. Modelling guidelines, in terms of domain and element size, are presented and appear to be less severe in time domain than in frequency analysis. The proposed three-dimensional model can be processed with no excessive computational resources. Besides boundary efficiency, wave propagation effects are studied through dispersion diagrams in the case of homogeneous and layered soil. In particular, dissipative conditions are described, with the emphasis on the proper representation of wave propagation. These analyses thoroughly validate the proposed modelling approach for transient excitations. Viscoelastic model of soils are therefore developed including piles group considered as concrete material. A decay function is chosen for the excitation defined in the time domain, allowing a large covering of the input force spectral content. The implementation and validation of the numerical model for predicting the dynamic stiffness and damping of pile groups are presented. Vertical and lateral pile and pile group impedance examples are given and compared to a published analytical model. The proposed analysis methodology provides a convincing example of the capability of the finite element method to reproduce foundation response to dynamic loading.

000015538 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015538 653__ $$a3-D Piles analysis, Pile group response, Soil–pile interaction, Finite element analysis, Seismic waves.

000015538 7112_ $$aCOMPDYN 2013 - 4th International Thematic Conference$$cIsland of Kos (GR)$$d2013-06-12 / 2013-06-14$$gCOMPDYN2013
000015538 720__ $$aKouroussis, G.$$iAnastasopoulos, I.$$iGazetas, G.$$iVerlinden, O.
000015538 8560_ $$ffischerc@itam.cas.cz
000015538 8564_ $$s2514181$$uhttps://invenio.itam.cas.cz/record/15538/files/1040.pdf$$yOriginal version of the author's contribution as presented on CD, section: CD-RS 29 SOIL-STRUCTURE INTERACTION
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000015538 962__ $$r15525
000015538 980__ $$aPAPER