A steel column in a residential building with 5 m effective height is subjected to factored end loads as listed below. The size of column section is 356 x 368 x 177 kg/m UC (Grade 355).
Given:
Factored axial load = 3500 KN
Factored moment about x-x axis, Mx-x, at top of column = +100 kNm
Factored moment about x-x axis, Mx-x, at bottom of column = -80 kNm
Amplification factor P-A-d effect in x-x axis = 1.1
Factored moment about y-y axis, My-y, at top of column=-60 kNm
Factored moment about y-y axis, My-y, at bottom of column = -40 kNm
Amplification factor P-A-8 effect in y-y axis = 1.1
Factored moment amplified for P-A-8 effect governing M.:
MT1.1 x 100 110 kNm (Note: Positive sign for clockwise moment; negative sign for anti-clockwise
moment)
(a) Determine the section class of the steel column.
(b) Check the cross section capacity of the steel column.
(c) Check the member buckling resistances of the steel column.