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Bridges

Girder bridges

Girder bridges are the simplest bridge type in structure and consist of steel beams shaped to an I-section or box section, called a plate girder bridge or a box girder bridge, respectively. Girder bridges are comprised of deck slabs, on which vehicles and people pass, and of main girders supporting the deck slabs. Deck slabs include RC deck slabs, steel deck slabs, composite deck slabs, and PC deck slabs. Bridges where the deck slabs and the main girders work together to resist loads are called composite girder bridges, and bridges designed to resist loads with the main girders only are called non-composite girder bridges. In general, effective spans of about 25 to 150 meters are applied, but the Costa e Silva Bridge (Brazil) was built with the longest effective span of 300 meters. JFE Engineering has the most experience in the manufacture and construction of bridges of this type.

Construction examples

Name
Kannonji Viaduct
Year completed
2011
Bridge type
(Bridge No. 5) 3-span continuous open-section box girder
Client
Ministry of Land, Infrastructure, Transport and Tourism Kinki Regional Development Bureau
Bridge length
Bridge No. 3: 118 m, Bridge No. 5: 196 m, Bridge No. 8: 219 m
Features
Steel-concrete composite deck slabs used
Name
Iwo Jima Bridge
Year completed
2011
Bridge type
3-span continuous steel deck curved box girder
Client
Nagasaki Prefecture
Bridge length
480m
Features
Marine single-operation erection of large block by floating crane
(Maximum block length: 163 m)
Kizugawa Bridge
Name
Kizugawa Bridge
Year completed
2007
Bridge type
6-span continuous composite open-section box girder
Client
Ministry of Land, Infrastructure, Transport and Tourism Kinki Regional Development Bureau
Bridge length
439 m
Features
・Open-section box girder bridge
・U-rib composite deck slab
・Weather-resistant bridge (CUPTEN COAT M)
Kashiogawa Bridge
Name
Kashiogawa Bridge
Year completed
2001
Bridge type
3-span continuous non-composite box girder
Client
Yokohama City
Bridge length
131 m
Features
Grading deck slabs used
Kuwana Interchange
Name
Kuwana Interchange
Year completed
2001
Bridge type
5-span continuous plate girder
Client
Mie Prefecture
Bridge length
185 m
Features
High Ni-based weather-resistant steel used
Senryo Bridge
Name
Senryo Bridge
Year completed
2000
Bridge type
4-span continuous non-composite minimized I girder
Client
Nagano Prefecture
Bridge length
255 m
Sabae Elevated Bridge
Name
Sabae Elevated Bridge
Year completed
1995
Bridge type
3-span continuous steel deck girder
Client
Ministry of Construction Kinki Regional Development Bureau
Bridge length
93 m
Minatomachi South Exit
Name
Minatomachi South Exit
Year completed
1995
Bridge type
3-span continuous steel deck box girder
Client
Hanshin Expressway Public Corporation
Bridge length
486 m
Tokyo Bay Aqua-Line
Name
Tokyo Bay Aqua-Line
Year completed
1995
Bridge type
Multi-span continuous steel deck box girder
Client
Trans-Tokyo Bay Highway Corporation
Bridge length
7004 m
Features
・Titanium clad steel coating used for bridge piers
・TMD installed as a measure against vortex shedding oscillation
Nanadaru Viaduct
Name
Nanadaru Viaduct
Year completed
1981
Bridge type
Sextuple 3-span continuous box girder, etc.
Client
Shizuoka Prefecture
Bridge length
512 m
Features
Loop bridge