Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Shear strengthening of fire-damaged reinforced concrete beams using NSM CFRP laminates
Highlights Fire-damaged reinforced concrete (RC) beams may lose their load-bearing capacity via shear failure. NSM CFRP laminates can be applied efficiently, increase the load capacity and stiffness. Shear strengthened RC beams may recover the initial load capacity or increase it considerably. NSM CFRP laminates can be applied efficiently on RC beams with spalled cover.
Abstract The aim of this study is to evaluate the shear strengthening of fire-damaged reinforced concrete (RC) beams with carbon fiber-reinforced polymer (CFRP) laminates using the near-surface mounted (NSM) technique. An experimental program involving 13 RC beams subjected to heating for 60, 90, and 120 min in accordance with the standard fire curve presented in International Organization Standardization (ISO) 834 is presented. After cooling to room temperature, the beams are strengthened with NSM CFRP laminates at spacings of 75, 150, and 200 mm. During heating, explosive spalling of concrete occurred in the samples. The NSM CFRP system can efficiently strengthen the shear of the beams; in most cases, it recovers the initial shear capacity of fire-damaged RC beams and increases it considerably. A smaller spacing between the laminates results in greater load capacities and stiffness, and a spacing of 75 mm causes the RC beams to fail owing to peeling-out in the strengthening region.
Shear strengthening of fire-damaged reinforced concrete beams using NSM CFRP laminates
Highlights Fire-damaged reinforced concrete (RC) beams may lose their load-bearing capacity via shear failure. NSM CFRP laminates can be applied efficiently, increase the load capacity and stiffness. Shear strengthened RC beams may recover the initial load capacity or increase it considerably. NSM CFRP laminates can be applied efficiently on RC beams with spalled cover.
Abstract The aim of this study is to evaluate the shear strengthening of fire-damaged reinforced concrete (RC) beams with carbon fiber-reinforced polymer (CFRP) laminates using the near-surface mounted (NSM) technique. An experimental program involving 13 RC beams subjected to heating for 60, 90, and 120 min in accordance with the standard fire curve presented in International Organization Standardization (ISO) 834 is presented. After cooling to room temperature, the beams are strengthened with NSM CFRP laminates at spacings of 75, 150, and 200 mm. During heating, explosive spalling of concrete occurred in the samples. The NSM CFRP system can efficiently strengthen the shear of the beams; in most cases, it recovers the initial shear capacity of fire-damaged RC beams and increases it considerably. A smaller spacing between the laminates results in greater load capacities and stiffness, and a spacing of 75 mm causes the RC beams to fail owing to peeling-out in the strengthening region.
Shear strengthening of fire-damaged reinforced concrete beams using NSM CFRP laminates
Medeiros da Costa, Leonardo (Autor:in) / Ancelmo de Carvalho Pires, Tiago (Autor:in) / Jéferson Rêgo Silva, José (Autor:in)
Engineering Structures ; 287
15.04.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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