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International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led
collaboration with leading technical
organizations from within the international concrete industry
and offers the most
comprehensive collection of published concrete abstracts.
Title: FRP for Prestressing of Concrete Bridges in Canada
Author(s): S. Rizkalla and G. Tadros
Publication: Special Publication
Volume: 215
Issue:
Appears on pages(s): 75-90
Keywords: bridges; carbon fibers; concrete; monitoring; optic
fibers; prestressing; safety
Date: 8/1/2003
Abstract:
This paper describes the use of Carbon Fiber Reinforced Polymer,
CFRP, tendons and rods for
prestressing concrete highway bridges completed in 1993 and
1997. Due to the lack of design codes, the
paper presents briefly the research work undertaken before the
final design of the two bridges. The first
bridge is a 75 ft. (23.85 m) span skew bridge, which consists of
bulb-tee pre-tensioned girders made
continuous with posttensioned steel strands. Four girders were
pre-tensioned by two types of CFRP. The
second bridge is 541 ft. (165 m) long and consists of five
simply supported span girders, 110 ft. (33 m)
long. Four girders were prestressed by two different types of
CFRP using straight and draped tendons.
The AASHTO girders were also reinforced with CFRP stirrups. A
portion of the deck slab is reinforced by
CFRP reinforcement. Design considerations, safety features and
construction of each bridge are described
briefly. The paper summarizes also the results of monitoring the
behavior of each bridge. The experience
gained from these two bridges provides valuable information for
the development of the design
guidelines, currently under consideration by the ACI Committee
440, Fiber Reinforced Polymer.
DOI: 10.14359/12859
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