Title:
FRP Retrofit for a Historic Arch Bridge in Southern Ontario
Author(s):
S. Davis, C.B. Laaber and K. Soudki
Publication:
Symposium Paper
Volume:
277
Issue:
Appears on pages(s):
79-88
Keywords:
bridge decks, rehabilitation, FRP reinforcement.
DOI:
10.14359/51682371
Date:
3/1/2011
Abstract:
Fiber reinforced polymer (FRP) reinforcements have emerged as alternative to traditional materials for reinforcing new structures and the rehabilitation of existing structures. This paper will present the first field application on the use of FRP reinforcement to rehabilitate a historic arch bridge located in Cambridge, Ontario Canada. The bridge, Main Street Bridge, is a two span concrete bowstring arch bridge built in 1931. As part of the rehabilitation, the existing deck and sidewalks were removed and replaced. Glass FRP (GFRP) reinforcement was used in the deck and sidewalks. The new deck was 200 mm thick and was reinforced with16mm diameter GFRP bars spaced at 300 mm o/c (top longitudinal) and 19mm diameter GFRP bars spaced at 150 mm o/c (bottom longitudinal). The transverse reinforcements were 16mm diameter GFRP bars at 300 mm o/c (top and bottom). The floor beams supporting the deck were deficient in shear and as such Carbon FRP (CFRP) U-wraps were installed transversely over the beam regions that were deficient in shear. The design for the GFRP reinforcement in the deck and the CFRP reinforcement for shear strengthening of the floor beams was according to the Canadian Highway Bridge Design Code (CSA S6-06). The rehabilitation work including condition assessment, FRP designs, and installation of the FRP systems are discussed.