RELIABILITY STUDY OF CFST COLUMNS FILLED WITH FRC BY USING MIDAS CIVIL & SPHERICAL SAMPLING SIMULATION

In this study, the CFST columns are analyzed with the help of MIDAS CIVIL software. The models are prepared and analyzed in MIDAS CIVIL software to determine the failure loads for different lengths, slenderness ratio and thickness of CFST columns. The obtained analytical Pu values are compared with codal formulae such as AISC LFRD Code, EURO code and CCES code. Corresponding graphs are plotted to get the difference between analytical Pu and codal Pu values. For these CFST columns, reliability analysis is carried out to know the design goal to achieve the nominal load carrying capacity with less deflection. The reliability analysis is carried out with the help of Comrel 9.5 software and the results such as reliability index (β) and probability of failure (pf) are tabulated for each CFST model. The reliability analysis is performed by two methods namely FORM and spherical sampling method. To identify and pick the combination of parameters that yield the best reliability index, Taguchi's approach is used.