A 16 in. square column is reinforced with four No. 14 (No. 43) bars, one in each corner, with cover distances 3 in. to the steel center in each direction. Material strengths are f c = 5000 psi and f y = 60,000 psi. Construct the interaction diagram relating axial strength Pn and flexural strength Mn . Bending will be about an axis parallel to one face. Calculate the coordinates for Po , Pb , and at least three other representative points on the curve. And then... Plot the design strength curve relating ϕ P n and ϕ M n for the column of the above. Design and detail the tie steel required by the ACI Code. Is the column a good choice to resist a load P u = 540 kips applied with an eccentricity e = 4.44 in.?
A 16 in. square column is reinforced with four No. 14 (No. 43) bars, one in each corner, with cover distances 3 in. to the steel center in each direction. Material strengths are f c = 5000 psi and f y = 60,000 psi. Construct the interaction diagram relating axial strength Pn and flexural strength Mn . Bending will be about an axis parallel to one face. Calculate the coordinates for Po , Pb , and at least three other representative points on the curve.
And then...
Plot the design strength curve relating ϕ P n and ϕ M n for the column of the above. Design and detail the tie steel required by the ACI Code. Is the column a good choice to resist a load P u = 540 kips applied with an eccentricity e = 4.44 in.?
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