How do we calculate the material performance index of a low-cost column? The height does not...
How do we calculate the material performance index of a low-cost column? The height does not matter but the cross-sectional diameter must be 10 +/- 0.1 cm. (Cross section is circular, column must support a 1-ton axial force without buckling)
Homework Answers
Solution :
P = 0.4 fckAc+0.67fyAsc
P = 0.4fck (Ag-Asc) + 0.67fyAsc
Ag = pi/4 x 1002 = 7.85 x 103 mm2
(10x103) = 0.4 x20 (7.85x103 - Asc) + 0.67 x 415 x Asc
= 195.51 mm2
“Buckling can be defined as the sudden large deformation of structure due to a slight increase of an existing load under which the structure had exhibited little, if any, deformation before the load was increased.”
For M25
= 246740.11/900 = 274.15
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