2015 CSCE Annual Conference Regina - Building on our Growth Opportunities

2015 CSCE Annual Conference Regina - Building on our Growth Opportunities Conference


Title
DESIGN OF A TWO-SPAN SEMI-INTEGRAL ABUTMENT BRIDGE WITH CONTINUOUS CURVED STEEL GIRDERS

Return to Session

Author(s)
Mr. Armando Chocron, Ryerson University (Presenter)
Mr. Tony Cicchetti Cicchetti
Mr. Patrick Clinton, Ryerson University
Mr. Mehdi Khodadadian
Mr. Christopher Mercieca
Mr. Kayhan Turker, Ryerson University
Dr. Sameh Salib
Dr. Khaled Sennah, Ryerson University
Abstract

In Canada, in general, and within the Greater Toronto Area (GTA), in particular, there is a constant demand to improve the transportation infrastructure. Herein, the subject project involves a new 2-span continuous curved steel girder bridge which merges a major road with a highway. The bridge is of a semi-integral abutment type which has been adopted frequently in North America over the past years due to its favourable characteristics. In these bridges, the deck extends beyond the abutments and then bends vertically down as a ballast wall to shift the expansion joints outside the structure itself. This serves to protect both superstructure and substructure components especially the bearings which are delicate and costly components to repair or replace. Moreover, in order to provide the most durable and cost effective bridge design, ‘Box’ and ‘I’ girder alternatives were investigated. During the design phase, as well as during construction, the complexity of curved bridges poses several challenges. Among them, are the significant torsional straining actions induced in both individual girders and entire deck system due to their curved geometry. Therefore, the analysis, design and construction should accommodate the related stability concerns associated with girders erection and deck construction as well as during the entire service life of the bridge. Further, the subject project has a unique challenge regarding the vertical clearance required for the vehicular traffic flow under the bridge. Through a sensitivity study, various deck design options were investigated from both technical and financial aspects in order to optimize the satisfaction of this requirement.