Analysis and design of tension and compression members | Steel Structures | Structural Engineering | Civil | GATE Syllabus, Paper Solution, Question Answer

Two steel columns P (length L and yield strength f_{y}=250 MP_{a}) and Q (length 2L and yield strengthf_{y}=500 MP_{a}) have the same cross-sections and end-conditions. The ratio of buckling load of column P to that of column Q is:

Consider the following statements for a compression member:

I. The elastic critical stress in compression increases with decrease in slenderness ratio. II. The effective length depends on the boundary conditions at its ends. III. The elastic critical stress in compression is independent of the slenderness ratio. IV. The ratio of the effective length to its radius of gyration is called as slenderness ratio.

A steel flat of rectangular section of size 70 × 6 mm is connected to a gusset plate by three bolts each having a shear capacity of 15 kN in holes having diameter 11.5 mm. If the allowable tensile stress in the flat is 150 MPa, the maximum tension that can be applied to the flat is