article · MATEC Web of Conferences
Experimental testing examines the structural behaviour of reinforced concrete beams strengthened in shear using prefabricated ultra-high performance fibre reinforced concrete plates bonded with epoxy. To evaluate approaches suitable for on-site execution, beams measuring 150 by 300 by 2000 millimetres were tested alongside an unstrengthened control beam. Two distinct configurations were assessed, one incorporating two 30-millimetre plates and another using a single 60-millimetre plate. The experimental findings show that strengthening a beam with two plates increases the load-carrying capacity by 145 percent compared to the control beam. Furthermore, applying a plate to one side of a beam successfully prevents shear cracks from developing across the strengthened surface.
Concrete infrastructure frequently requires reinforcement to maintain safety margins under increasing loads or structural deterioration. Demonstrating that prefabricated ultra-high performance fibre reinforced concrete plates substantially increase load-bearing capacity and suppress crack formation provides engineers with an effective option for upgrading structural components.
This technique applies to structural retrofitting and rehabilitation within the construction sector, targeting civil engineering firms and infrastructure asset owners. The use of prefabricated plates bonded with epoxy is intended to facilitate on-site assembly. As the findings are based on laboratory testing of individual beam specimens, the approach represents applied and tested research requiring further real-world validation before adoption in commercial repair programmes.
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This paper investigates the behavior of RC beams strengthened in shear with UHPFRC. In order to ensure high quality and facilitate the strengthening process on site applications, it has been considered to apply UHPFRC as a plate pasted on concrete using epoxy. In addition to the control beam, two strengthened RC beams using prefabricated UHPFRC plates were prepared and tested. All beams had the same rectangular cross-section geometry (150mm x 300mm x 2000mm). Two different techniques were considered during the strengthening process; the first application was the addition of two 30 mm UHPFRC plates, whereas the second beam strengthened using one 60 mm UHPFRC plate. Results showed that strengthening RC beams using two UHPFRC plates improved load carrying capacity with 145 % comparing with the control beam. Moreover UHPFRC plate in case of strengthening one side of the RC beam prevented shear cracks from appearing on the strengthened side.
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DOI: 10.1051/matecconf/201819909002
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