Optimum CFRP Configuration to Efficiently Repair Laterally Damaged, Simply Supported Rectangular Reinforced Concrete Beams
Publication: Practice Periodical on Structural Design and Construction
Volume 18, Issue 3
Abstract
This research investigated flexural behavior of repaired RC beams that experienced simulated lateral damage to replicate vehicle impact/collision. The experimental program included the testing of 34 RC beams, which were laterally damaged and then repaired using carbon-fiber-reinforced polymer (CFRP) fabrics. The damaged beams were repaired using various levels of strengthening (number of CFRP soffit layers) and multiple configurations of anchoring CFRP U-wrapping. Specific attention was paid to understanding the effects of intermediate U-wrapping on strains developed in the longitudinal soffit laminates and the beams’ ultimate capacity. Other details for the flexural repair system, such as end-peeling previsions, were also addressed. The test results indicated that CFRP repairs have the ability to restore and enhance the capacity of damaged RC beams by up to 353%. The results also suggest an optimum range for spacing intermediate U-wrappings to suppress strains felt by longitudinal soffit laminates, thereby mitigating premature debonding failures. Design considerations and recommendations for optimum CFRP configuration, level of strengthening, and application details for repairing laterally damaged RC beams are proposed.
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References
American Concrete Institute (ACI). (2005). “Building code requirements for structural concrete and commentary.” ACI 318-05 and ACI 318R-05, Farmington Mills, MI.
American Concrete Institute (ACI). (2008). “Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures.” ACI 440.2R-08, Farmington Hills, MI.
Charkas, H., Rasheed, H. A., and Melhem, H. (2003). “Rigorous procedure for calculating deflections of fiber-reinforced polymer-strengthened reinforced concrete beams.” ACI Struct. J., 100(4), 529–539.
China Association for Engineering Construction Standardization. (2003). “Technical specification for strengthening concrete structure with carbon fiber reinforced polymer laminate.” CECS 146, Beijing.
El-Mihilmy, M. T., and Tedesco, J. W. (2001). “Prediction of anchorage failure for reinforced concrete beams strengthened with fiber-reinforced polymer plates.” ACI Struct. J., 98(3), 301–314.
Fu, C. C., Burhouse, J. R., and Chang, G. L. (2004). “Overheight vehicle collisions with highway bridges.” Transportation Research Record 1865, Transportation Research Board, Washington, DC, 80.
Grace, N. F., Abdel-Sayed, G. A., Soliman, A. K., and Saleh, K. R. (1999). “Strengthening reinforced concrete beams using fiber reinforced polymer (FRP) laminates.” ACI Struct. J., 96(5), 865–875.
Green, P. S., Boyd, A. J., and Lammert, K. (2004). “CFRP repair of impact-damaged bridge girders, Volume I: Structural evaluation of impact damaged prestressed concrete I girders repaired with FRP materials.” Rep. BC-354 RPWO #55, Florida Department of Transportation, Gainesville, FL.
Razaqpur, G. A., and Isgor, B. (2006). “Proposed shear design method for FRP-reinforced concrete members without stirrups.” ACI Struct. J., 103(1), 93–102.
Rosenboom, O., and Rizkalla, S. (2007). “Analytical modeling of flexural debonding in CFRP strengthened reinforced or prestressed concrete beams.” Proc., 8th Int. Symp. on Fiber Reinforced Polymer Reinforcement for Concrete Structures (FRPRCS-8).
Schiebel, S., Parretti, R., and Nanni, A. (2001). “Repair and strengthening of impacted PC girders on bridge.” Rep. A4845, Missouri Department of Transportation, Jefferson City, MO.
Shin, Y., and Lee, C. (2003). “Flexural behavior of reinforced concrete girders strengthened with carbon fiber-reinforced polymer laminates at different levels of sustaining load.” ACI Struct. J., 100(2), 231–239.
Tumialan, J. G., Huang, P. C., and Nanni, A. (2001). “Strengthening of an impacted PC girder on bridge A10062.” Final Rep. RDT01-013/RI99-041, Missouri Department of Transportation, St. Louis County, MO.
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© 2013 American Society of Civil Engineers.
History
Received: Dec 16, 2011
Accepted: Oct 9, 2012
Published online: Oct 11, 2012
Published in print: Aug 1, 2013
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