Buckling Behavior of Cantilevered Pultruded Fiber-Reinforced Plastic Angle Beams
Keywords:
Pultruded Fiber-Reinforced Plastic (PFRP), Angle Section, Cantilever Beam, PultrusionAbstract
In this article, the experimental findings of cantilever beam testing of pultruded fiber-reinforced plastic (PFRP) angle sections are described. The buckling behaviors of PFRP angle section beams under tip concentrated loads are studied. Then, the experimental buckling loads are compared to the critical buckling loads predicted utilizing the AISC-LRFD design equation to evaluate the validity of the equation. The E-glass fiber-reinforced and polyester-resin-based PFRP angle beams tested in this investigation were produced using the pultrusion method. The beams had three different geometries: 50 × 6.4 mm, 76 × 6.4 mm, and 102 × 6.4 mm, and had span-to-width ratios ranging from 10 to 50. According to the load-deformation curves, the specimens have linear elastic responses to 90–95% of their buckling loads. The lateral-torsional buckling is the failure mode of the specimens. According to the findings of the tests, the AISC-LRFD equation provides an unsatisfactory prediction of the critical buckling loads of the pultruded FRP cantilever angle beams. Finally, an appropriate modification factor is provided to compute the buckling loads of PFRP angle beams.
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