000015800 001__ 15800
000015800 005__ 20161115135330.0
000015800 04107 $$aeng
000015800 046__ $$k2013-06-12
000015800 100__ $$aSimos, N.
000015800 24500 $$aNumerical Analysis of Seismic Response of Natural Stone Arch Bridges. Field Observations and a Case Study

000015800 24630 $$n34.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000015800 260__ $$bNational Technical University of Athens, 2013
000015800 506__ $$arestricted
000015800 520__ $$2eng$$aPrompted by interest in heritage preservation and the search of optimized intervention/rehabilitation using advanced methodologies and practices, the seismic vulnerability of natural stone structures and in particular of arch bridges has been the theme of recent comprehensive studies which, based on sophisticated numerical modeling and computational schemes, have attempted to understand (a) their dynamic response during a large earthquake that pushes the structure beyond its “pseudo-elastic” limit and (b) their inherent structural capacity that is expected to be reduced due to mortar ageing and degradation Within the most recent seismic studies specific natural stone arch bridges exhibiting a wide range of structural features and sizes have been studied analytically/numerically using scaled earthquake signals representative of the regional seismic families and their spectral content. These highly non-linear analyses, which were based on exact modeling representation of the structures themselves as well as sophisticated and explicit mortar-stone interfaces and stonestone contact and interaction relations, explored the response to scaled, multi-dimensional earthquakes that pushed these structures towards collapse in an effort to identify weak links and most vulnerable aspects of their design. These “extreme” seismic analyses were based on three-dimensional dynamic finite element formulation using the LS-DYNA and TrueGrid software the performance of which has been extensively tested and benchmarked against highly non-linear structural behavior of primarily reinforced concrete structures, as well as contact and impact. The variation in structural response and vulnerability stemming from different earthquake characteristics, i.e. near-field and far-field earthquakes, has also been studied and will be presented. A specific natural stone arch bridge, identified to have been damaged by a recent earthquake, was used as the field study and the benchmarking basis for the complex numerical simulation formulation. Results of the simulation study aimed to identify the most probable cause of the earthquake damage between earthquake intensity, duration and spectral content on one hand and the specific structural and foundation characteristics of the structure on the other will be presented.

000015800 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015800 653__ $$a

000015800 7112_ $$aCOMPDYN 2013 - 4th International Thematic Conference$$cIsland of Kos (GR)$$d2013-06-12 / 2013-06-14$$gCOMPDYN2013
000015800 720__ $$aSimos, N.$$iGeorge, M.
000015800 8560_ $$ffischerc@itam.cas.cz
000015800 8564_ $$s25726$$uhttps://invenio.itam.cas.cz/record/15800/files/1473.pdf$$yOriginal version of the author's contribution as presented on CD, section: CD-MS 15 NUMERICAL SIMULATION AND EXPERIMENTAL VERIFICATION ON PROBLEMS IN THE FIELD OF EARTHQUAKE ENGINEERING AND STRUCTURAL DYNAMICS
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000015800 962__ $$r15525
000015800 980__ $$aPAPER