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000022238 005__ 20170622150003.0
000022238 04107 $$aeng
000022238 046__ $$k2015-05-25
000022238 100__ $$aNtotsios, Evangelos
000022238 24500 $$aPREDICTIONS OF THE DYNAMIC RESPONSE OF PILED FOUNDATIONS IN A MULTI-LAYERED HALF-SPACE DUE TO INERTIAL AND RAILWAY INDUCED LOADINGS

000022238 24630 $$n5.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000022238 260__ $$bNational Technical University of Athens, 2015
000022238 506__ $$arestricted
000022238 520__ $$2eng$$aIn this paper, the dynamic pile-soil-pile interaction (PSPI) in a multi-layered halfspace is investigated for the prediction of the response of piled foundations due to railway vibrations. Two methods of modelling piled foundations in a multi-layered half-space are presented. The first is an efficient semi-analytical model that calculates the Green’s functions of the multi-layered half-space soil using the thin layer and the dynamic stiffness matrix methods. The second is a fully-coupled model that utilises the boundary element (BE) method to simulate the soil, where the Green’s functions are calculated using the ElastoDynamics Toolbox (EDT). The paper aims to investigate the accuracy and the efficiency of the semi-analytical model by comparing the predictions of the two methods. A set of comparisons is performed, including the driving point response of a single pile and the interaction between two piles. The comparisons reveal that, at most frequencies, the semi-analytical model can predict the driving point response and the dynamic interaction with acceptable accuracy and computational efficiency. The model is then used for predicting the response of a pile-group due to the vibration field generated by a railway in varying distance from the piles. The vibration field generated by the railway is modelled as the superposition of the response due to harmonic loadings generated at the wheel-rail interface and the vibration response is examined at different points on the free surface away from the piles. The comparisons highlight the efficiency and accuracy of the semi-analytical model and illustrate its practical application.

000022238 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000022238 653__ $$aPile Foundations, Pile-Soil-Pile Interaction, Ground Wave Propagation, Railway Induced Vibration.

000022238 7112_ $$aCOMPDYN 2015 - 5th International Thematic Conference$$cCrete (GR)$$d2015-05-25 / 2015-05-27$$gCOMPDYN2015
000022238 720__ $$aNtotsios, Evangelos$$iTalbot, James$$iHunt, Hugh$$iHussein, Mohammed$$iThompson, David$$iHamad, Waleed
000022238 8560_ $$ffischerc@itam.cas.cz
000022238 8564_ $$s1428802$$uhttp://invenio.itam.cas.cz/record/22238/files/C1618.pdf$$yOriginal version of the author's contribution as presented on CD, section: 
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000022238 962__ $$r22030
000022238 980__ $$aPAPER