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Maintenance and repair of slab anchors on a curved non composite steel box-girder bridge

 Maintenance and repair of slab anchors on a curved non composite steel box-girder bridge
Autor(en): , ,
Beitrag für IABSE Congress: Challenges in Design and Construction of an Innovative and Sustainable Built Environment, Stockholm, Sweden, 21-23 September 2016, veröffentlicht in , S. 884-891
DOI: 10.2749/stockholm.2016.0871
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Fractures of slab anchors were detected on a curved non-composite steel box-girder bridge on the Metropolitan Expressway. Fractographic investigation concluded that the fractures were caused by met...
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Bibliografische Angaben

Autor(en): (Shutoko Engineering Company Limited Tokyo, Japan)
(Metropolitan Expressway Company Limited Tokyo, Japan)
(Horus Company Limited Tokyo, Japan)
Medium: Tagungsbeitrag
Sprache(n): Englisch
Tagung: IABSE Congress: Challenges in Design and Construction of an Innovative and Sustainable Built Environment, Stockholm, Sweden, 21-23 September 2016
Veröffentlicht in:
Seite(n): 884-891 Anzahl der Seiten (im PDF): 8
Seite(n): 884-891
Anzahl der Seiten (im PDF): 8
Jahr: 2016
DOI: 10.2749/stockholm.2016.0871
Abstrakt:

Fractures of slab anchors were detected on a curved non-composite steel box-girder bridge on the Metropolitan Expressway. Fractographic investigation concluded that the fractures were caused by metallic fatigue. Because of fractures of slab anchors, a gap originated due to bond deterioration around the boundaries of the RC slab and the steel girder, and also closure behavior of the gaps due to traffic of over-sized vehicles was confirmed. Maintenance and repair was implemented to integrate once again the RC slab and the steel girder. As means of construction, post-installed anchor was used since traffic regulation is unnecessary and construction is possible from beneath the road surface.

Therefore, a FEM analysis and a local load carrying test was carried out intended for curved box girders of a maximum transverse slope of 9%. Reviews considering deformation behavior and acting force of the damage were conducted and was reflected in the repair design.

Stichwörter:
Ermüdung FEM gekrümmte Brücke

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