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) 310m, (Ramp D) 214m
|
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
|
187m
|
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
|
224m
|
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
|
125m
|
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
|
234m
|
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
|
325m
|
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
|
360m
|
Client
|
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
|
78m
|