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Title: Effects of stirrup spacing on shear performance of hybrid composite beams produced by pultruded GFRP profile infilled with reinforced concrete
Authors: Özkılıç, Y.O.
Gemi, L.
Madenci, E.
Aksoylu, C.
Keywords: Damage analysis
Glass fabric
Hybrid beam
Pultruded GFRP
Reinforced concrete
Concrete beams and girders
Energy dissipation
Fiber reinforced plastics
Reinforced concrete
Shear flow
Damage analysis
GFRP composites
Glass fabric
Hybrid beam
Pultruded GFRP
Pultruded profiles
Stirrups spacing
Corrosion resistance
Issue Date: 2023
Publisher: Springer Science and Business Media Deutschland GmbH
Abstract: Pultruded Glass Fiber-Reinforced Polymer (pultruded GFRP) composite produced by the pultrusion method has become popular in civil engineering applications due to its lightness, corrosion resistance and high strength. However, the use of the pultruded profile combining with reinforced concrete is still limited due to a lack of knowledge. Therefore, the behavior of the pultruded GFRP profile infilled with reinforced concrete beams (hybrid beams) is investigated. This study focused on the effects of stirrup spacing for the hybrid beams. Pursuant to this goal, a total of eight different beams were tested under four-point loading. One reference beam without the pultruded profile and seven hybrid beams having different stirrup spacings were considered. Moreover, the hybrid beams with and without stirrups were wrapped by unidirectional GFRP composite to investigate the effects of stirrup spacing on shear capacity of the beams strengthened by GFRP composite. The experimental findings revealed that tightening stirrups increased the load and energy dissipation capacities of the hybrid beams; however, it could not prevent brittle failure. On the other hand, wrapping hybrid beams with GFRP composite increased the load and energy dissipation capacities and also prevented brittle failure regardless of the presence of the stirrups. Therefore, it is strongly recommended that the unidirectional pultruded profiles should be strengthened with 90° GFRP wrapping to have ductile behavior. © 2022, Wroclaw University of Science and Technology.
ISSN: 1644-9665
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collections

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