Effect of thickness of inner carbon fibre reinforced polymer tubes on axial compressive behaviour of steel-concrete-carbon fibre reinforced polymer-concrete columns. (November 2015) - Liu, Y. J.
Abstract : Steel-concrete-carbon fibre reinforced polymer-concrete columns (SCCC columns) have been introduced as a new form of hybrid columns by first author. An SCCC column consists of an outer steel tube, an inner carbon fibre reinforced polymer tube, an annular concrete between two concentric tubes and a core concrete encased in carbon fibre reinforced polymer tube. This paper presents the results of a test study that was conducted to investigate the effect of thickness of inner carbon fibre reinforced polymer tube on the axial compressive behaviour of SCCC columns. Four SCCC columns with carbon fibre reinforced polymer tubes of two different thicknesses of 0·167 mm and 0·334 mm in addition to two reference columns without carbon fibre reinforced polymer tube were prepared. All the six short columns, each 260 mm in diameter, 780 mm in height, were manufactured and tested to failure under pure axial compression. Test results demonstrate that the circular hybrid SCCC columns are of excellent axial compression behaviour, and that increasing the thickness of inner carbon fibre reinforced polymer tube can increase the ultimate axial load capacity and ultimate axial strain of SCCC columns remarkably.