A 450 mm square tied RC column is to carry axial service loads of 1500 kN dead load and 800 kN live load. Assume column to be short column and any moment caused by the loads can be neglected Use 2010 NSCP, iffc= 28 MPa and fy = 415 MPa, determine: The factored axial load. b) The required mumber of 28 mm diameter longitudinal bars. c) The maximum allowable spacing of 10 mm diameter lateral bars.
A 450 mm square tied RC column is to carry axial service loads of 1500 kN dead load and 800 kN live load. Assume column to be short column and any moment caused by the loads can be neglected Use 2010 NSCP, iffc= 28 MPa and fy = 415 MPa, determine: The factored axial load. b) The required mumber of 28 mm diameter longitudinal bars. c) The maximum allowable spacing of 10 mm diameter lateral bars.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Problem 5.6
A 450 diameter concrete spiral column is to be designed to support a factored axial load of 3200 kN.
Clear bar covering is 40 mm and the aggregate size is 25 mm. Use the 2010 NSCP with fc = 28 MPa, fy = 415
MPa, fyt = 415 MPa. Limit the gross steel percentage to 2%. Find the following
a)
b)
c)
The mumber of pcs of 28 mm diameter bars for the longitudinal reinforcements.
The spacing of the 10 mm diameter spiral reinforcements in mm.
Which of the following mostly nearly gives the clear spacing of the main longitudinal reinforcements in
mm
Transcribed Image Text:A 450 mm square tied RC column is to cary axial service loads of 1500 kN dead load and 800 kN live
load. Assume column to be short columm and any moment caused by the loads can be neglected Use 2010
NSCP, iffc=28 MPa and fy=415 MPa, determine:
a)
b)
The factored axial load.
The required number of 28 mm diameter longitudinal bars.
c)
The maximum allowable spacing of 10 mm điameter lateral bars.
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