Abstract
The pultruded Fiber Reinforced Polymer (PFRP) material manufactured by the “pultrusion” process has many applications in the construction industry. However, the production process involves several difficult-to-control stages, which can lead to material defects. This paper proposes a method to determine the local buckling resistance of FRP composite I column having material imperfection on the flanges and web. The research has shown that the buckling load determined in nonlinear buckling analysis is 15.5% higher than that obtained from eigenvalue solution (linear perturbation analysis). In addition, the post-buckling resistance of the column is 66.4% higher compared to the local buckling load. The author suggests that this modelling and determination method be widely applied to PFRP structures when studying the instability of columns or beams under various loadings and boundary conditions and different combinations of defects.
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