United States Department of Transportation
i
Value engineering and cost effectiveness of various fiber reinforced polymer (FRP) repair systems : final report, June 2007.
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2007-06-01
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[PDF-8.28 MB]
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Alternative Title:Value engineering and cost effectiveness of various fiber reinforced polymer (FRP) repair systems, Phase II : final report, June 2007.
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Edition:Final report; July 2005-Dec. 2006.
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Abstract:This report is an extension to the final report for NCDOT project 2004-15 “Value Engineering and Cost-Effectiveness of
Various Fiber Reinforced Polymers (FRP) Repair Systems”, submitted in June 2005. In that report, seventeen 30-ft long
prestressed concrete c-channels were tested under static and fatigue loading conditions using various carbon fiber reinforced
polymer (CFRP) strengthening systems to determine their structural behavior, cost effectiveness and constructability. The 2004-
15 final report also included the behavior of impact damaged AASHTO girders repaired by CFRP systems and tested under
fatigue loading conditions.
This final report for NCDOT project 2006-10, summarizing the results of Phase II of the NCDOT project 2004-15, includes
the behavior of four additional c-channel prestressed concrete girders strengthened with externally bonded high modulus CFRP
sheets and high strength steel reinforced polymer (SRP) wire mesh. The report includes also the behavior of four additional
AASHTO type II girders. Two long-span AASHTO girders were tested static loading conditions to assess the performances of
FRP systems designed to repair impact damage. Two AASHTO girders were tested using short spans to determine the
effectiveness of using FRP to restore the shear capacity of impact damaged girders with one girder tested as control specimen and
one damaged then repaired with FRP. The repaired girder was stronger than the damaged girder, indicating that the FRP repair is
effective in restoring the girder shear capacity.
Based on the above, the entire experimental program consisted of twenty-one girders strengthened with various FRP and
SRP materials and five AASHTO girders repaired with FRP to restore their flexural and shear capacities. The research indicates
that FRP systems are effective for the strengthening/repair of concrete highway bridges. The report provides detailed procedures
for installation as well as efficient inspection procedures to ensure effectiveness of the strengthening/repair systems.
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