Yazarlar: Cenan Özkaya, Fikret Tulumtaş, Gülden Çetin
Yayın Yeri : 7th New York City Bridge Conference
Yayın Yılı : 2013
Açıklama : In 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.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.
For the railway viaduct, the same design philosophy was followed with considering the
serviceability issues related to high-speed railway bridges. Curved surface slider bearings having
a dynamic friction coefficient of 12% with 2.54 mm yield displacement are selected.