Dabar Bridge
Encyclopedia
The Dabar Bridge is located between the Šibenik
and Vrpolje interchanges of the A1 motorway
in the Dalmatia
region of Croatia
. It is a 330 metres (1,082.7 ft) long concrete girder bridge
spanning the Dabar flash flood
gully
at a height of 60 metres (196.9 ft).
The bridge is 354.12 metres (1,161.8 ft) long overall, executed across 7 spans (40 m (131.2 ft) + 5 x 50 m (164 ft) + 40 m (131.2 ft)). Axis of the bridge is in a horizontal circular curve 2400 metres (7,874 ft) in diameter. The cross section of the bridge comprises two dilated structures, each carrying one motorway carriageway consisting of two 3.75 metres (12.3 ft) wide traffic lanes and one 2.5 metres (8.2 ft) wide emergency lane. The bridge is 27.9 metres (91.5 ft) wide overall.
Bridge piers comprise a box cross-section measuring 5 m (16.4 ft) by 3.2 m (10.5 ft) with a constant wall thickness of 30 centimetres (11.8 in). Top of each of the piers is closed by an Omnia
slab 15 cm (5.9 in) deep. Each motorway carriageway is supported by a separate set of piers. The abutments, on the other hand, are designed to support both of the carriageways. The cross-girders are placed at the abutments and the piers.
The Dabar Bridge was designed by Jure Radnić and constructed by Hidroelektra niskogradnja, Zagreb
.
. Substantial variations between annual (AADT) and summer (ASDT) traffic volumes are attributed to the fact that the bridge carries substantial tourist traffic to the Dalmatian
Adriatic resorts. The traffic count is performed using analysis of motorway toll ticket sales.
Šibenik
Šibenik is a historic town in Croatia, with population of 51,553 . It is located in central Dalmatia where the river Krka flows into the Adriatic Sea...
and Vrpolje interchanges of the A1 motorway
A1 (Croatia)
The A1 motorway is the longest motorway in Croatia spanning . As it connects Zagreb, the nation's capital, to Split, the second largest city in the country and the largest city in Dalmatia, the motorway represents a major north–south transportation corridor in Croatia and a significant part of the...
in the Dalmatia
Dalmatia
Dalmatia is a historical region on the eastern coast of the Adriatic Sea. It stretches from the island of Rab in the northwest to the Bay of Kotor in the southeast. The hinterland, the Dalmatian Zagora, ranges from fifty kilometers in width in the north to just a few kilometers in the south....
region of Croatia
Croatia
Croatia , officially the Republic of Croatia , is a unitary democratic parliamentary republic in Europe at the crossroads of the Mitteleuropa, the Balkans, and the Mediterranean. Its capital and largest city is Zagreb. The country is divided into 20 counties and the city of Zagreb. Croatia covers ...
. It is a 330 metres (1,082.7 ft) long concrete girder bridge
Bridge
A bridge is a structure built to span physical obstacles such as a body of water, valley, or road, for the purpose of providing passage over the obstacle...
spanning the Dabar flash flood
Flash flood
A flash flood is a rapid flooding of geomorphic low-lying areas—washes, rivers, dry lakes and basins. It may be caused by heavy rain associated with a storm, hurricane, or tropical storm or meltwater from ice or snow flowing over ice sheets or snowfields...
gully
Gully
A gully is a landform created by running water, eroding sharply into soil, typically on a hillside. Gullies resemble large ditches or small valleys, but are metres to tens of metres in depth and width...
at a height of 60 metres (196.9 ft).
The bridge is 354.12 metres (1,161.8 ft) long overall, executed across 7 spans (40 m (131.2 ft) + 5 x 50 m (164 ft) + 40 m (131.2 ft)). Axis of the bridge is in a horizontal circular curve 2400 metres (7,874 ft) in diameter. The cross section of the bridge comprises two dilated structures, each carrying one motorway carriageway consisting of two 3.75 metres (12.3 ft) wide traffic lanes and one 2.5 metres (8.2 ft) wide emergency lane. The bridge is 27.9 metres (91.5 ft) wide overall.
Construction
The deck structure consists of longitudinal girders, cross-girders, and the deck. The abutments and the outermost piers support the structure through bearings while the remaining four piers are fixed to the deck structure. The longitudinal girders are executed as prefabricated, pretensioned girders and there are 10 longitudinal girders comprising the cross-section of the bridge, i.e. five of them, with axes set 2.7 metres (8.9 ft) apart, supporting each of the carriageways. Length of the prefabricated girders ranges from 38.6 m (126.6 ft) to 39 m (128 ft) in the peripheral spans and between 48.24 m (158.3 ft) and 48.66 m (159.6 ft) in the remaining spans. The girders are 240 centimetres (94.5 in) high I-sections with 268 centimetres (105.5 in) wide upper flange. The bottom flange of the longitudinal girders is 68 centimetres (26.8 in) wide. The longitudinal girders were manufactured in a special plant next to the bridge construction site and placed in the bridge structure using incremental launching.Bridge piers comprise a box cross-section measuring 5 m (16.4 ft) by 3.2 m (10.5 ft) with a constant wall thickness of 30 centimetres (11.8 in). Top of each of the piers is closed by an Omnia
Omnia
Omnia may refer to:* Omnia , PaganFolk band from the Netherlands* Omnia Township, Cowley County, Kansas* Omnia, a fictional nation in the Discworld universe* Omnia, a fictional realm in the Sudeki universe...
slab 15 cm (5.9 in) deep. Each motorway carriageway is supported by a separate set of piers. The abutments, on the other hand, are designed to support both of the carriageways. The cross-girders are placed at the abutments and the piers.
The Dabar Bridge was designed by Jure Radnić and constructed by Hidroelektra niskogradnja, Zagreb
Zagreb
Zagreb is the capital and the largest city of the Republic of Croatia. It is in the northwest of the country, along the Sava river, at the southern slopes of the Medvednica mountain. Zagreb lies at an elevation of approximately above sea level. According to the last official census, Zagreb's city...
.
Traffic volume
Traffic is regularly counted and reported by Hrvatske autoceste, operator of the bridge and the A1 motorway where the bridge is located, and published by Hrvatske cesteHrvatske ceste
Hrvatske ceste is a Croatian state-owned company pursuant to provisions of the Croatian Public Roads Act , the county and local roads are managed by county authorities, while the motorways are managed by Croatian Motorways Ltd and other concessionaires.The company is currently administered by a...
. Substantial variations between annual (AADT) and summer (ASDT) traffic volumes are attributed to the fact that the bridge carries substantial tourist traffic to the Dalmatian
Dalmatia
Dalmatia is a historical region on the eastern coast of the Adriatic Sea. It stretches from the island of Rab in the northwest to the Bay of Kotor in the southeast. The hinterland, the Dalmatian Zagora, ranges from fifty kilometers in width in the north to just a few kilometers in the south....
Adriatic resorts. The traffic count is performed using analysis of motorway toll ticket sales.
| Dabar Bridge traffic volume | ||||
| Road | Counting site | AADT | ASDT | Notes |
| A1 | 5316 Šibenik south | 7,923 | 17,450 | Between Šibenik and Vrpolje interchanges. |
See also
- A1 motorwayA1 (Croatia)The A1 motorway is the longest motorway in Croatia spanning . As it connects Zagreb, the nation's capital, to Split, the second largest city in the country and the largest city in Dalmatia, the motorway represents a major north–south transportation corridor in Croatia and a significant part of the...
- List of arch bridges by length
- List of bridges by length