A short rectangular column 300 mm on one side and 400 mm on the other side. It is reinforced with 8-20-mm-diameter longitudinal bars equally distributed to the shorter sides of the column. The centroid of the bars are 70 mm from the concrete surface. Use f’c = 21 MPa and fy = 415 MPa. a. Determine the nominal compressive force on concrete only when the column is at balanced condition with bending about the strong axis. = [Cc] kN (whole number, ANS: 888) b. Determine the location of the plastic centroid from the left short side of the column. = [x] mm (ANS 200) c. Determine the ultimate axial load the column can sustain at balanced condition if the reduction factor is 0.65. = [Pub] kN (whole number, ANS 552).
A short rectangular column 300 mm on one side and 400 mm on the other side. It is reinforced with 8-20-mm-diameter longitudinal bars equally distributed to the shorter sides of the column. The centroid of the bars are 70 mm from the concrete surface. Use f’c = 21 MPa and fy = 415 MPa. a. Determine the nominal compressive force on concrete only when the column is at balanced condition with bending about the strong axis. = [Cc] kN (whole number, ANS: 888) b. Determine the location of the plastic centroid from the left short side of the column. = [x] mm (ANS 200) c. Determine the ultimate axial load the column can sustain at balanced condition if the reduction factor is 0.65. = [Pub] kN (whole number, ANS 552).
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A short rectangular column 300 mm on one side and 400 mm on the other side. It is reinforced with 8-20-mm-diameter longitudinal bars equally distributed to the shorter sides of the column. The centroid of the bars are 70 mm from the concrete surface. Use f’c = 21 MPa and fy = 415 MPa.
a. Determine the nominal compressive force on concrete only when the column is at balanced condition with bending about the strong axis. = [Cc] kN (whole number, ANS: 888)
b. Determine the location of the plastic centroid from the left short side of the column. = [x] mm (ANS 200)
c. Determine the ultimate axial load the column can sustain at balanced condition if the reduction factor is 0.65. = [Pub] kN (whole number, ANS 552).
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