Abstract
In this paper, experimental investigation on the behavior of concrete filled steel tube infilled with Polypropylenefibre (PPF) under monotonic loading is carried out. Here the strength of 54 Specimens was tested. The parameters varied in this study are 1) percentage of PPF (0%, 0.2%, 0.3%, 0.4%) 2) Diameter of the hollow circular steel tubes (33.7mm and 42.4mm) 3)L/D ratios(10,12 and 14) and 4) Grades of concrete(M20 and M30). The thickness of steel tubes is 3.2mm which remains same for all the specimens. Polypropylene fiber concrete filled steel columns exhibit higher strength than steel tubes filled with conventional concrete. The results show that load carrying capacity increased with increase in percentage of polypropylene. it was observed that the load carrying capacity of the steel tube decreased as the D/t ratio increased. The experimental results were compared with theoretical results and analysis results using ABAQUS software
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