QB.38. A square tied column with a side dimension of 490 mm is reinforced with 16- 28 mm dia. bars distributed equally on all faces. The column is subjected to factored end moments of 603 and 616 kN-m without causing a sidesway. It carries an ultimate axial load of 1394 KN. The column has an unsupported height of 4.8 m. Use f'c = 20.5 MPa. Assume k = 1. Answer the following: (1) What is the relative stiffness (or El) of the column expressed in N-mm^2. (2) Calculate the moment magnifier factor if the column is bent in single curvature. (3) Compute the design moment of the column.

Structural Analysis
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ISBN:9781337630931
Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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QB.38. A square tied column with a side dimension of 490 mm is reinforced with 16- 28 mm dia. bars distributed equally on all
faces. The column is subjected to factored end moments of 603 and 616 kN-m without causing a sidesway. It carries an ultimate
axial load of 1394 kN. The column has an unsupported height of 4.8 m. Use f'c = 20.5 MPa. Assume k = 1. Answer the following: (1)
What is the relative stiffness (or El) of the column expressed in N-mm^2. (2) Calculate the moment magnifier factor if the column is
bent in single curvature. (3) Compute the design moment of the column.
Transcribed Image Text:QB.38. A square tied column with a side dimension of 490 mm is reinforced with 16- 28 mm dia. bars distributed equally on all faces. The column is subjected to factored end moments of 603 and 616 kN-m without causing a sidesway. It carries an ultimate axial load of 1394 kN. The column has an unsupported height of 4.8 m. Use f'c = 20.5 MPa. Assume k = 1. Answer the following: (1) What is the relative stiffness (or El) of the column expressed in N-mm^2. (2) Calculate the moment magnifier factor if the column is bent in single curvature. (3) Compute the design moment of the column.
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