Authors:
B. Rajlic, P. Murray, D. Dykstra, R. Krisciunas
8th International Conference on Short and Medium Span Bridges, Niagara Falls, Canada, August 2010
Abstract
This paper describes the unique rehabilitation method and structural details used for the Eagle River Bridge superstructure replacement. The existing superstructure of the Eagle River Bridge on the TransCanada Highway was a three-span continuous concrete slab on haunched steel girders. As a result of fatigue issues and deck deterioration, the Ontario Ministry of Transportation (MTO) decided to replace the entire superstructure. To address concrete quality issues, accelerate construction and reduce impact on the travelling public, the superstructure replacement was side-by-side prestressed concrete box girders. What was unique about this decision was to forgo the use of a distribution slab or transverse prestressing, while still creating a semi-continuous structure. Other bridge components including curbs, approach slabs, expansion joints and sleeper slabs were also prefabricated. Fibre reinforced polymer (FRP) bars were used to increase structural durability. They were also used throughout the prefabricated components, resulting in a virtually steel free superstructure.
