An analytical study to investigate the improvement in local buckling capacity of pultruded FRP I-sections as a result of adding flange lips is presented. A finite element model of an I-beam loaded in four point bending was used in the investigation. The results of the model were verified through comparison with reported experimental results. The modeled beams had flange lips of a constant width and varying height. The effect of flange lips on the behavior of the beams has been investigated by comparing them with the behavior of beams with no flange lips. The results show that providing the compression flanges with lips significantly improves the buckling and ultimate loads of the beams.
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