A column is pinned at one end and fixed at the other end, and has its \'weak\' a

Question

A column is pinned at one end and fixed at the other end, and has its 'weak' axis (y-axis) supported at its midheight (which prevent lateral movement in the x-direction only) as shown. a)If 1_x= 2 I_y, will the column buckle about the x-axis or y-axis first? Circle one. b)If the column was fixed at both ends, the critical buckling load about the x-axis would increase by a factor of c)If this column had a cross-section that was symmetric about both the x-axis and y-axis, it would buckle about the x-axis first. d)If the effective slenderness ratio of the column is increased b, a facto, of 2, the critical buckling suess will decrease by a factor of 4.

Explanation / Answer

a-x axis

b-no increase by 4

c-yes

d-yes because stress=pi^2E/S^2

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