1. The column section shown is reinforced with 10 bars having b-400mm, bar size-28mm, f'c-35MPa, concrete cover = 50mm, tie diameter = 10mm, and fy = 420MPa. Considering bending along the strong axis for a balanced section, calculate a. the depth of compression block in the column in mm. b. the stress in the middle layer of steel reinforcement in MPa. c. the compressive force in the concrete in kN. d. the compressive force in the extreme compression reinforcement in kN. e. the ultimate axial load capacity of the column in kN. f. the eccentricity of the column in mm. g. the ultimate moment capacity of the column in kN.m h. the pure axial load capacity of the column. b=400mm 28mm 10 bars 600 mm

1. The column section shown is reinforced with 10 bars having b-400mm, bar size-28mm, f'c-35MPa, concrete cover = 50mm, tie diameter = 10mm, and fy = 420MPa. Considering bending along the strong axis for a balanced section, calculate a. the depth of compression block in the column in mm. b. the stress in the middle layer of steel reinforcement in MPa. c. the compressive force in the concrete in kN. d. the compressive force in the extreme compression reinforcement in kN. e. the ultimate axial load capacity of the column in kN. f. the eccentricity of the column in mm. g. the ultimate moment capacity of the column in kN.m h. the pure axial load capacity of the column. b=400mm 28mm 10 bars 600 mm

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Bars

In civil engineering, bars refer to steel reinforcement bars or rebars. These are structural members primarily used for reinforcement purposes in masonry works. A bar is characterized by its cross-sectional area, which is negligible compared to its length. Bars are usually manufactured by steel which is uniform throughout the length, or by meshing multiple steel wires. Other materials of the bar include carbon steel, glass fiber, carbon fiber, and basalt fiber. The reinforcing bars are coated with epoxy resins and other materials to enhance some of their properties including corrosion resistance.

Question

1. The column section shown is reinforced with 10 bars having b-400mm, bar size-28mm, fc-35MPa,
concrete cover = 50mm, tie diameter = 10mm, and fy = 420MPa. Considering bending along the strong
axis for a balanced section, calculate
a. the depth of compression block in the column in mm.
b. the stress in the middle layer of steel reinforcement in MPa.
c. the compressive force in the concrete in kN.
d. the compressive force in the extreme compression reinforcement in kN.
e.
the ultimate axial load capacity of the column in kN.
f. the eccentricity of the column in mm.
g. the ultimate moment capacity of the column in kN.m
h. the pure axial load capacity of the column.
b=400mm
28mm
10 bars
600 mm

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