Reliability Investigation of Steel Cased Columns

Reliability analysis of steel cased columns designed in accordance with BS5950 was 1 carried using First Order Reliability Method (FORM). Design variables such as design axial load and moment, concrete strength, yield strength of steel, cross-sectional dimensions of the plate and universal column, as well as thickness of the base plate were considered random and stochastic. It was y shown among other findings that, as the material strength P was increased, the safety of the designed section considering axially loaded decreased. However, considering combined axial load and bending condition, as the material strength was increased, the safety of the section increased. It was also shown that applied bending moment has more significant effect on concrete strength of the cased column than on steel strength.