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
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Name
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Ohashi Junction
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Year completed
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2010
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Bridge type
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Rigid-frame bridge
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Client
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Metropolitan Expressway Co., Ltd.
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Bridge length
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(Ramp B) 310m, (Ramp D) 214m
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Features
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-
4-span continuous steel deck box girder (double-deck structure)
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Large-scale junction construction in an urban area via single-operation erection of large blocks at night
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Name
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Ebinakita Junction Ramp F Bridge
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Year completed
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2005
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Bridge type
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Rigid-frame bridge
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Client
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Central Nippon Expressway Company Limited
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Bridge length
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187m
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Features
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-
4-span continuous box girder (1-box 3-cell section)
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Single-operation erection of large blocks spanning over the Tomei Expressway
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Steel-concrete composite deck slabs used
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Name
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Yokooji Viaduct
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Year completed
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2005
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Bridge type
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3-span continuous steel deck slab rigid-frame bridge
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Client
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Hanshin Expressway Public Corporation
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Bridge length
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224m
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Features
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Weather-resistant bridge (chemical conversion treatment applied)
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Name
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Kotsuki Bridge
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Year completed
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2002
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Bridge type
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3-span continuous composite rigid-frame bridge
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Client
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Japan Highway Public Corporation
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Bridge length
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125m
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Features
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Superstructure-substructure integral bridge
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Name
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Section KJ141
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Year completed
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2001
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Bridge type
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5-span continuous rigid-frame bridge
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Client
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Metropolitan Expressway Public Corporation
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Bridge length
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234m
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Features
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Rigid frame connected with steel piers
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Name
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Toyoyama (No. 5) Section
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Year completed
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2000
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Bridge type
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3-span continuous steel deck rigid-frame bridge
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Client
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Nagoya Expressway Public Corporation
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Bridge length
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325m
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Features
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Rigid frame connected with steel piers
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Name
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Nishizawa Bridge
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Year completed
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1995
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Bridge type
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5-span continuous V-pier rigid-frame bridge
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Client
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Yamanashi Prefecture
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Bridge length
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360m
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Client
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Curved V-leg rigid frame
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Name
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Sanpodani Bridge No. 4
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Year completed
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1994
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Bridge type
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Braced rigid-frame bridge
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Client
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Ministry of Land, Infrastructure, Transport and Tourism Kyushu Regional Development Bureau
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Bridge length
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78m
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