2. A square steel hollow channel is 18mm x 18mm and has a wall thickness of 2mm. If this size channel was used and cut to a length of L = 1.25m and was used as a column with fixed-pinned ends, determine (let E = 210 GPa): (a) the critical stress in the column with respect to buckling, and (b) if the cross section is changed to a hollow circular cross section, where the outer diameter is inscribed inside the original square cross section, will its critical stress be higher or lower than part (a)? Why? Assume the same material thickness. (Note: to receive full credit you must briefly explain your answer - you cannot just use numbers as proof)
2. A square steel hollow channel is 18mm x 18mm and has a wall thickness of 2mm. If this size channel was used and cut to a length of L = 1.25m and was used as a column with fixed-pinned ends, determine (let E = 210 GPa): (a) the critical stress in the column with respect to buckling, and (b) if the cross section is changed to a hollow circular cross section, where the outer diameter is inscribed inside the original square cross section, will its critical stress be higher or lower than part (a)? Why? Assume the same material thickness. (Note: to receive full credit you must briefly explain your answer - you cannot just use numbers as proof)
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Big and clear handwriting with the drawing please. Make sure calculations and answers are accurate please. THANK YOU
Transcribed Image Text:2. A square steel hollow channel is 18mm x 18mm and has a wall thickness of 2mm. If this size channel
was used and cut to a length of L = 1.25m and was used as a column with fixed-pinned ends, determine
(let E = 210 GPa):
(a) the critical stress in the column with respect to buckling, and
(b) if the cross section is changed to a hollow circular cross section, where the outer diameter is
inscribed inside the original square cross section, will its critical stress be higher or lower than
part (a)? Why? Assume the same material thickness. (Note: to receive full credit you must
briefly explain your answer - you cannot just use numbers as proof)
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