Optimum CFRP configuration to efficiently repair laterally damaged, simply supported rectangular reinforced concrete beams
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. © 2013 American Society of Civil Engineers.
Practice Periodical on Structural Design and Construction
Digital Object Identifier (DOI)
ElSafty, & Graeff, M. K. (2013). Optimum CFRP Configuration to Efficiently Repair Laterally Damaged, Simply Supported Rectangular Reinforced Concrete Beams. Practice Periodical on Structural Design and Construction, 18(3), 165–176. https://doi.org/10.1061/(ASCE)SC.1943-5576.0000150