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Home > Publications > 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: Externally Bonded Composites for Strengthening Concrete T- Beam Bridges
Author(s): S. Morton
Publication: Special Publication
Appears on pages(s): 687-696
Keywords: bridges; carbon fiber; fiber reinforced polymers; highways; structures; thermography
Abstract:This paper presents the results of laboratory testing of concrete beams and field testing of two concrete T-Beam bridges that were externally strengthened with CFRP. As a result of the lab testing all the systems tested showed a considerable increase of 68% for the ultimate strength and 45% decrease in deflection for the beams with 2-#4 reinforcing bars . The beams with 2-#7 reinforcing bars showed a 60% increase in ultimate strength and a 26 % decrease in deflection when comparing the loads that produced yielding of the steel in the baseline and the 5 layer test. Both structures were load tested and monitored before and after application of the CFRP with strain gages and LVDTs. The results showed an increase up to 8% in stiffness and up to 15% decrease in strain. In addition to the load test a quality assurance NDT evaluation was performed on the bond using infrared thermography. The results showed typically less than 2% voids between the CFRP and the concrete.
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