Abstract
Reinforced column with external wrapping of FRP (Fiber Reinforced Polymer) is one of the strengthening methods. The objective of this experimental work is to determine the axial stress and strain capacity of BFRP (Basalt Fiber Reinforcement Polymer) strengthened RC columns (Reinforced Concrete) under axial loading. The dimension of RC square cross section column 100 mm × 100 mm with λ = 10 (slenderness ratio) and RC circular column of diameter 150 mm with λ = 6.67 (slenderness ratio) are externally strengthened by BFRP layers as per the ACI 440.2R-8 code. All the columns are casted at the depth of 1000 mm. The parameters studies are, shape of the columns (square and circular) and number of BFRP layers (one, two and three). Result discussed about the unconfined and BFRP confined RC columns stress–strain response, deformation control, lateral confining pressure and cost analysis. It is concluded that the RC short circular column confined with BFRP three layers offer more resistance to buckling and has greater load carrying capacity than that of the unconfined circular column and BFRP confined square columns. The ultimate stress and strain equations were predicted from the trend line drawn for BFRP strengthened RC square and circular columns.
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