An axially loaded rectangular tied column is to be designed for the following service loads. Dead Load = 1500 kN, Live Load = 850 kN, with its required strength, U=1.2 DL+1.6 LL. The effective cover to centroid of reinforcement is 70 mm. The concrete strength, fc= 28 MPa, while the steel yield strength fy=415 MPa. If the square column section has a side of 450 mm and vertical reinforcements consists of 16 bars, detemine the diameter of vertical bars if the required minimum steel ratio is 3%? If the column has a circular section, detemine the required minimum diameter if it is reinforced with 8- 25 mm diameter bars. a) b)

An axially loaded rectangular tied column is to be designed for the following service loads. Dead Load = 1500 kN, Live Load = 850 kN, with its required strength, U=1.2 DL+1.6 LL. The effective cover to centroid of reinforcement is 70 mm. The concrete strength, fc= 28 MPa, while the steel yield strength fy=415 MPa. If the square column section has a side of 450 mm and vertical reinforcements consists of 16 bars, detemine the diameter of vertical bars if the required minimum steel ratio is 3%? If the column has a circular section, detemine the required minimum diameter if it is reinforced with 8- 25 mm diameter bars. a) b)

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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Question

An axially loaded rectangular tied column is to be designed for the following service loads. Dead Load =
1500 kN, Live Load = 850 kN, with its required strength, U=1.2 DL+1.6 LL. The effective cover to centroid
of reinforcement is 70 mm. The concrete strength, f'c= 28 MPa, while the steel yield strength fy=415 MPa.
If the square column section has a side of 450 mm and vertical reinforcements consists of 16 bars,
a)
determine the diameter of vertical bars if the required minimum steel ratio is 3%?
If the column has a circular section, detemine the required minimum diameter if it is reinforced with 8-
b)
25 mm diameter bars.

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3 نقاط The minimum reinforcement using mild steel in slab should not be less than .., if fy=420 MPa ...... 2.0% 1.8% 0.15% 0.18%