Analytical Study and Reliability Evaluation of Concrete filled Steel Tubes by FOSM Method using ABAQUS Software

Concrete filled steel tube column has got many leads associated with the reinforced concrete member. Concrete filled steel tubes are often used for piers, profound foundations, caissons and columns because of its high compressive strength and stiffness. Analytical Study and Reliability analysis of Hollow Steel Tube with concrete filled of different grades under monotonic loading is offered in this study. The nonlinear behavior of the columns is perceived by using finite element software ABAQUS 6.10- The outcomes from non-linear finite element analyses is attained and is substantiated with Euro code Part-4 and Reliability analysis. This study was carried out to examine the effect of numerous parameters such as thickness of tube (3.2mm), Diameter of steel tube (26.90mm, 33.70mm & 42.40mm) Slenderness ratio & Reliability and Also to find Ultimate load carrying ability of hollow and composite column on compressive response under axis loading was assessed. The main parameters are: (1) Slenderness ratio (2) Thickness -steel tube (3) compressive strength of concrete. Properties of above variables mentioned on the behavior of columns are weighed. Catastrophe modes and deformed shape of the columns is also demonstrated. From this study, it is decided that, the advanced finite element model gives nearer perfection and shows the nonlinear behavior well with 5-10% error. Also the nonlinear behavior is inspected initially only steel tube is loaded then on concrete is loaded and when both is loaded and the combination of both steel tube and infill concrete give greater load carrying capacity. The diagnosed results are well authenticated with preceding researchers too.