000015730 001__ 15730
000015730 005__ 20161115135328.0
000015730 04107 $$aeng
000015730 046__ $$k2013-06-12
000015730 100__ $$aCasolo, S.
000015730 24500 $$aNon-Linear Dynamic Analysis of Masonry Towers Under Natural Accelerograms Accounting for Soil-Structure Interaction

000015730 24630 $$n34.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000015730 260__ $$bNational Technical University of Athens, 2013
000015730 506__ $$arestricted
000015730 520__ $$2eng$$aThe object of the paper is the influence of the soil-structure interaction on the dynamic response of masonry towers, for which a high level of stress is involved already in the static field. The relevant deformations and displacements at the base of the tower suggest that a significant volume of ground is engaged into the overall dynamic response, both as a participating mass and as a potential carrier of energy dissipation. In order to investigate this aspect and assess the sensitivity of the dynamic response of the soil-structure system to different soil characteristics, the non linear dynamic response of a case study is analysed, by including in the model a significant volume of foundation soil and considering two different ground types. The numerical model is based on a specific Rigid Body and Springs approach, in which the structure is idealized as a mechanism made of rigid elements connected each to the other by axial and shear springs. The nonlinear behaviour is lumped into the springs assigning proper constitutive laws able to model the significant inelastic aspects of the constitutive behaviour and the meso-scale damage mechanisms with a moderate computational effort. Two types of foundation soil have been considered in order to perform the dynamical analysis accounting for the soil-structure interaction: rock and deposits of compact gravel. For both models, non-linear dynamic analyses have been performed adopting natural records having different characteristics (with regard to the frequency content; distance from the epicentre and type of soil). Some interesting considerations are derived from this comparative study about a problem that is very actual for those who deal with non linear dynamics of structures, but yet is not much explored.

000015730 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015730 653__ $$aKeywords: Masonry towers; Seismic assessment; Nonlinear dynamic analysis; natural accelerograms; vertical accelerograms; Soil-structure Interaction.

000015730 7112_ $$aCOMPDYN 2013 - 4th International Thematic Conference$$cIsland of Kos (GR)$$d2013-06-12 / 2013-06-14$$gCOMPDYN2013
000015730 720__ $$aCasolo, S.$$iUva, G.
000015730 8560_ $$ffischerc@itam.cas.cz
000015730 8564_ $$s2492163$$uhttps://invenio.itam.cas.cz/record/15730/files/1342.pdf$$yOriginal version of the author's contribution as presented on CD, section: CD-RS 29 SOIL-STRUCTURE INTERACTION
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000015730 962__ $$r15525
000015730 980__ $$aPAPER