Analytical Study on FRP-Concrete-Steel Double Skin Tubular Columns Under Lateral Impact

This paper presents the analytical study on non-linear behavior of FRP-concrete-steel double skin tubular (DST) columns subjected to impact loading. To improve the strength and ductility of columns, carbon fibre reinforced polymer (CFRP) is used. Extended finite element analysis is carried out on a total of twelve column specimens including nine FRP-concrete-steel double skin tubular (DST) specimens and three reinforced concrete (RC) specimens with inner hollow tube with varying parameters of FRP layers and impact energy. Finite element analysis of these models was conducted using ABAQUS/CAE software. Predicted maximum deflection and peak acceleration of all the specimens from the analysis were validated with the experimental results available in literature. The results of finite element simulations show good agreement with the experimental results.