000015872 001__ 15872
000015872 005__ 20161115135332.0
000015872 04107 $$aeng
000015872 046__ $$k2013-06-12
000015872 100__ $$aOzkaya, C.
000015872 24500 $$aAssessment and Design of Seismically Isolated Bridges in Proximity of Major Faults and Located on Liquefiable Soils

000015872 24630 $$n34.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000015872 260__ $$bNational Technical University of Athens, 2013
000015872 506__ $$arestricted
000015872 520__ $$2eng$$aIn this paper, seismic isolation design of one highway viaduct and one high-speed railway viaduct located within few hundred meters of North Anatolian fault in Turkey is studied. Strong near-field characteristics such as directivity and liquefaction are expected due to soft soil conditions under the scenario earthquake. Seismic assessments of viaducts are performed considering these unfavorable effects. For the highway viaduct, a hybrid seismic isolation system is chosen for the bridge consisting of four natural and two lead-rubber bearings supporting the six steel-girders at each substructure. Lead cores in the lead-rubber bearings are designed to have an overall characteristic strength equal to 10% of the superstructure weight. This large characteristic strength is intentionally chosen to limit the isolator displacements under near-field effects. Furthermore, the supplementary four natural rubber bearings over each substructure provided additional stiffness to achieve a small post elastic period. For the railway viaduct, the same design philosophy was followed with considering the serviceability issues related to high-speed railway bridges. Since yield displacement of leadrubber bearings are about 2-3 cm, which is unsatisfactory for stringent displacement limits specified in international railway codes, in this case curved surface slider bearings having a dynamic friction coefficient of 12% with 2.54 mm yield displacement are selected.

000015872 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015872 653__ $$aSeismic Isolation, Seismic Assessment, Near-Field, Liquefaction, Viaduct

000015872 7112_ $$aCOMPDYN 2013 - 4th International Thematic Conference$$cIsland of Kos (GR)$$d2013-06-12 / 2013-06-14$$gCOMPDYN2013
000015872 720__ $$aOzkaya, C.$$iGercek, M.
000015872 8560_ $$ffischerc@itam.cas.cz
000015872 8564_ $$s1280370$$uhttps://invenio.itam.cas.cz/record/15872/files/1602.pdf$$yOriginal version of the author's contribution as presented on CD, section: CD-MS 14 SEISMIC ASSESSMENT AND RETROFIT OF BRIDGES
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000015872 962__ $$r15525
000015872 980__ $$aPAPER