New pultruded ‘Fibre-PolyCell’ beams – development and proof of case concept

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This paper presents a recent investigation on pultruded FRP beams with large perforations, ‘Fibre-PolyCell’, subject to static transverse actions. Experimental testing is undertaken to obtain member failure modes, stiffness, and load carrying capacity. Large openings in such members provide easy service integration and aesthetic pleasing from an architectural perspective. Existing research on perforated beams is also limited to steel. Two FRP cellular beams were tested, and neither were strengthened. The beams were subjected to uniformly distributed and three-point bending loading. Under the three-point bending test, the beam failed at mid-span due to 45-degree shear cracks propagation. The restraints were successful in preventing any torsional failure mechanisms, and twisting of the beam only occurred after failure. In comparison, the beam under distributed load failed due to web buckling and shear cracks which propagated at 45 degrees towards the perforation. The specimen under a distributed load also recorded higher ultimate load capacity of 60.6 kN along with a relative lower deflection attributed to the spread of large shear and moment concentrations shifting the failure to the supports.
Original languageEnglish
Number of pages12
JournalCase Studies in Construction Materials
Publication statusSubmitted - 10 Oct 2019


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