Increasing the Flexural Capacity of an Existing Reinforced Concrete Bridge in Texas Using CFRP Composites

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Title: Increasing the Flexural Capacity of an Existing Reinforced Concrete Bridge in Texas Using CFRP Composites

Author(s): S. F. Brena and M. A. Steves

Publication: Special Publication

Volume: 215

Issue:

Appears on pages(s): 203-218

Keywords: bridge strengthening; carbon-fiber-reinforced composites; composites; reinforced concrete; strengthening

Date: 8/1/2003

Abstract:
This paper presents the application of carbon fiber reinforced polymer (CFRP) composites to strengthen an existing reinforced concrete bridge in Texas. The composites were used to increase the flexural strength of the bridge so that it would comply with the load rating required to qualify for roadway widening. The existing pangirders in the bridge required a 53% increase in the nominal flexural strength to meet the H-20 load rating required by the Texas Department of Transportation. Two strengthening systems were utilized in different spans of the bridge. The design methodology of these designs was validated in the laboratory by conducting full-scale tests of strengthened bridge components. Results from the laboratory tests indicated that the target required flexural strength was achieved with both designs. The bridge will be inspected periodically to identify any distress that may occur in the composite laminates.