EXPERIMENTAL INVESTIGATION ON CFST COLUMNS WITH LIGHT WEIGHT CONCRETE AS INFILL UNDER CYCLIC LOADING

Eadara Ramesh Babu, N S Kumar

Abstract: Experimental investigation has been carried out to study the behavior of Concrete Filled Steel Tube (CFST) columns under cyclic loading with different Length to Diameter (L/D) ratios. Generally cyclic loading is the application of fluctuating stresses and strains on structural elements. The fatigue degradation that occurs at particular locations of the tested specimens have been examined. In this study, effect on the buckling load capacity of CFST columns have been studied. Totally 72 specimens of different dimensions are prepared and three grades of concrete is used such as M20, M30 and M40 and models are developed using software ABAQUS 10.1 for the same parameters. Experimental results are verified and checked with ABAQUS results. It is found that buckling/ultimate load increases as the grade of concrete increases and decreases with the increase in L/D ratios.

Keywords: CFST, Ultimate load, Buckling, L/D ratios, cyclic loading.

DOI: https://doi.org/10.15623/ijret.2018.0703004