Abstract

In the present investigation an attempt is made to study strength of 42 Specimens, Of Which half of the specimens are of diameter 33.7mm and remaining half are of diameter 42.4mm. Tests are conducted for concrete filled steel tubes (CFST) of L/D ratio 10,12 and 14 with infilled concrete of grade M30 and M40 having fiber content of 0%,0.2% and 0.3% .This paper deals with comparative study between experimental results and analytical results obtained by linear finite element analysis software ABAQUS , for CFST under axial compression. The experimental investigation is carried out on circular CFST specimens. The tests on said CFST specimens are carried out with the help of monotonic loading machine. Experimental and analytical results are compared. From which it is observed that analytical results are in good agreement with experimental results. Analysis was run for both hollow tubes and CFST. The important factors which affect axial shortening and ultimate axial load bearing capacity of CFST column are cross-sectional area (A), thickness of steel tube (t) and strength of infilled concrete (fck). Glass fibre reinforced concrete (GFRC) is a new material which enhanced strength and improved ductility.