A 380mm x 380mm concrete column which is pin connected at both ends has an unsupported length of 4.9m. The column is carrying a total factored axial load Pu = 520 kN and a lateral concentrated load of 240 kN acting at the mid-height of the column. Assume f’c = 22 MPa and β_dns = 0.3. (a) 1 pt. Compute the critical buckling load (kN). (b) 1 pt. Compute the magnification factor. (c) 1 pt. Compute the total moment (kN-m) including the secondary moment due to lateral deflection.

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A 380mm x 380mm concrete column which is pin connected at both ends has an unsupported length of 4.9m. The column is carrying a total factored axial load Pu = 520 kN and a lateral concentrated load of 240 kN acting at the mid-height of the column. Assume f’c = 22 MPa and  = 0.3. (a) 1 pt. Compute the critical buckling load (kN). (b) 1 pt. Compute the magnification factor. (c) 1 pt. Compute the total moment (kN-m) including the secondary moment due to lateral deflection.

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