Shear Strengthening of RC Beams with FRCM Composites: A State-ofthe-Art
2016 (English)In: Construction and Building Materials, ISSN 0950-0618, E-ISSN 1879-0526Article in journal (Refereed) Submitted
This paper summarizes the state-of-the-art on the topic ofshear strengthening of RC beams using externally bonded FRCM composites.In the first part of this paper, a detailed bibliographical review of theliterature on the shear strengthening of RC beams using FRCM compositesis carried out, and a database of experimental tests is developed.Analysis of the database shows that FRCM composites are able to increasethe shear strength of RC beams. The effectiveness of the strengtheningsystem appears to be influenced by parameters including the wrappingconfiguration, matrix compressive strength relative to the concretecompressive strength, and axial rigidity of the fibers. Different failuremodes have been reported, including fracture of the fibers, detachment ofthe FRCM jacket (with or without concrete attached), and slippage of thefibers through the mortar. A possible interaction between the internaltransverse steel reinforcement and the FRCM system has also beenobserved. In the second part of this paper, four design models proposedto predict the contribution of the FRCM composite to the shear strengthof RC beams are assessed using the database developed. Results show thatthe use of the properties of the FRCM composite in Models 3 and 4 insteadof the fiber mechanical characteristics does not significant increase theaccuracy of the models. A simple formulation such as that proposed by Model 1, based on the bare fiber properties, is found to be more accuratefor elements with or without composite detachment.
Place, publisher, year, edition, pages
FRCM, FRP, reinforced concrete, shear, strengthening.
Research subject Structural Engineering
IdentifiersURN: urn:nbn:se:ltu:diva-62575OAI: oai:DiVA.org:ltu-62575DiVA: diva2:1083125
ProjectsEuropean Network for Durable Reinforcement and Rehabilitation Solutions (endure)
FunderEU, FP7, Seventh Framework Programme, MC-ITN-2013-607851