Franjo Tuđman Bridge (Dubrovnik)
42.66805555555618.079166666667Koordinaten: 42 ° 40 '5 " N, 18 ° 4' 45" E
F1
National road D8
The Franjo Tuđman - Bridge ( Croatian: . Musts dr Franja Tuđmana ), also known as Dubrovnik Bridge (Most Dubrovnik ) is a two-lane road bridge of the Croatian national road D8. It is named after Franjo Tuđman, the first president of Croatia after independence of the country in 1991.
The building spans in Dubrovnik in the northwest of the center city district Gruž with a total length, including abutments of 518 m, a bay of the Adriatic Sea with the mouth of the Ombla. Thus, the distance between Dubrovnik and Split is shortened by 12 km. Between the years 1998 and 2002, the bridge was built.
The building consists of a reinforced concrete structure with a pillar stands on the north bank, and a einhüftigen cable-stayed bridge, the pylon is located on the south shore. The main opening is at a clear height of 50 m, a span of 304.4 m, the total span of 472.1 m. The transition between the two bridge parts is carried out with a support construction.
The building was designed by Herbert Beck and Karl Sporschill shame that it could fall back on older Croatian designs.
Prestressed concrete bridge
The concrete bridge is divided by a 40 -meter-high pillar, which is founded on 40 piles with diameter of 1.2 m, in a marginal field with 87.35 m span and a cantilever with 60,05 m span. At the Kragarmspitze a support the cable-stayed bridge is present.
The superstructure has a cross-section of a single-cell prestressed concrete box girder with a variable depth of system. This is above the pillars 8.22 m and 3.0 m at the transition to cable-stayed bridge. The vertical bars are the pillar 80 cm thick, the base plate has a thickness of 1.05 m there with a width of 8.0 m.
The preparation was carried out from the piers, to a length of 60 m in both directions, using the balanced cantilever with control cycle lengths of 5.0 m. The remaining 27 m of the superstructure were concreted in front of the abutment with a falsework.
Cable-stayed bridge
The asymmetric cable bridge consists of a 244 m long main box, which is mounted on the Überbaukragarm of prestressed concrete bridge and the 80.7 m exciting side panel.
The main panel is supported by ten tufts arranged cable pairs, three cable pairs carry the side panel. Six harp shaped arrangement rope tension pairs directly from the pylon to the south, 18.8 m long abutment and are anchored there. In the transverse direction of the bridge superstructure has a twin-girder cross section. The outer, 2.0 m high main carrier in which the ropes are anchored, are arranged at a distance of 13.0 m and 5.0 m, all welded together by transverse girders. The cross members are connected by shear connectors with the 25 cm thick reinforced concrete deck slab. The 141.5 meter high pylon of cable-stayed bridge has a λ -shape. The stems have a rectangular hollow cross-section of reinforced concrete.
The bridge structure has been extensively studied in respect of the design due to its location the forces resulting from earthquakes and wind and dimensioned accordingly. Nevertheless, there were in the up to 220 m long ropes during winter storms vibrations with displacements of up to 2 m. The oscillations were observed when the wind speed of 110 km / hour, as a snow adhered to the ropes, which changes the cross-section and thus, the increased force on the input and output by the wind. Therefore, on the ropes subsequently controlled vibration dampers were installed.