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Bridges

Rigid-frame (Ramen) bridges

Rigid-frame (Ramen) bridges are a bridge type made up of groups of rigidly connected members on which bending moment, axial force, and shear force work at the same time. Rigid-frame bridges are grouped into Vierendeel bridges, which are considered superstructure girder bridges, and bridges of superstructure-substructure integral structure. Bridges of superstructure-substructure integral structure include braced rigid-frame bridges, V-leg rigid-frame bridges, and viaducts in urban areas. The applied spans of rigid-frame bridges are about 40 to 80 meters in general. JFE Engineer has been involved in the construction and erection of many rigid-frame bridges.

Construction examples

Name
Ohashi Junction
Year completed
2010
Bridge type
Rigid-frame bridge
Client
Metropolitan Expressway Co., Ltd.
Bridge length
(Ramp B) 310 m, (Ramp D) 214 m
Features

・4-span continuous steel deck box girder (double-deck structure)
・Large-scale junction construction in an urban area via single-operation erection of large blocks at night

Name
Ebinakita Junction Ramp F Bridge
Year completed
2005
Bridge type
Rigid-frame bridge
Client
Central Nippon Expressway Company Limited
Bridge length
187 m
Features

・4-span continuous box girder (1-box 3-cell section)
・Single-operation erection of large blocks spanning over the Tomei Expressway
・Steel-concrete composite deck slabs used

Name
Yokooji Viaduct
Year completed
2005
Bridge type
3-span continuous steel deck slab rigid-frame bridge
Client
Hanshin Expressway Public Corporation
Bridge length
224 m
Features

Weather-resistant bridge (chemical conversion treatment applied)

Name
Kotsuki Bridge
Year completed
2002
Bridge type
3-span continuous composite rigid-frame bridge
Client
Japan Highway Public Corporation
Bridge length
125 m
Features

Superstructure-substructure integral bridge

Name
Section KJ141
Year completed
2001
Bridge type
5-span continuous rigid-frame bridge
Client
Metropolitan Expressway Public Corporation
Bridge length
234 m
Features

Rigid frame connected with steel piers

Name
Toyoyama (No. 5) Section
Year completed
2000
Bridge type
3-span continuous steel deck rigid-frame bridge
Client
Nagoya Expressway Public Corporation
Bridge length
325 m
Features

Rigid frame connected with steel piers

Name
Nishizawa Bridge
Year completed
1995
Bridge type
5-span continuous V-pier rigid-frame bridge
Client
Yamanashi Prefecture
Bridge length
360 m
Features

Curved V-leg rigid frame

Name
Sanpodani Bridge No. 4
Year completed
1994
Bridge type
Braced rigid-frame bridge
Client
Ministry of Land, Infrastructure, Transport and Tourism Kyushu Regional Development Bureau
Bridge length
78 m