Materials for Civil and Construction Engineers (4th Edition)
4th Edition
ISBN: 9780134320533
Author: Michael S. Mamlouk, John P. Zaniewski
Publisher: PEARSON
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Question
Chapter 11, Problem 11.27QP
(a)
To determine
The modulus of elasticity of the reinforced concrete.
(b)
To determine
The load carried by the each of the steel and plain concrete.
(c)
To determine
The minimum required cross sectional area of the column.
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A short reinforced concrete column is subjected to a 1000 kN axial compressive load. The moduli of elasticity of plain concrete and steel are 25 and207 GPa, respectively, and the cross-sectional area of steel is 2% of that of thereinforced concrete. Considering the column as a structural member made of a composite material and subjected to load parallel to the steel rebars, calculate the following:a. the modulus of elasticity of the reinforced concreteb. the load carried by each of the steel and plain concretec. the minimum required cross-sectional area of the column given that the allowable compressive stress of plain concrete is 20 MPa and that the allowable compressive stress of plain concrete will be reached before that of steel.
The composite bar shown in the figure is firmly
attached to unyielding supports. An Axial force P
52 kips is applied at 65° F. Compute the stress
(ksi) in the Aluminum at 116 °F. Assume a = 6.5 x
106/° F for steel and 12.8 x 106°F for aluminum
Given: L1 = 17in; L2 = 13in
%3D
%3D
Your final answer should contain two decimal
places
Aluminum
A = 2 in?
E = 10 x 10 psi
Steel
A = 3 in?
E = 29 x 10 psi
L1
- L2
The composite bar shown in the figure is firmly attached to unyielding supports. An Axial force P = 52 kips is applied at 65°F. Compute
the stress (ksi) in the Aluminum at 116 °F. Assume a = 6.5 x 10-6/° F for steel and 12.8 x 106/°F for aluminum
Given: L1 = 15in; L2 = 11in
Your final answer should contain two decimal places
Steel
A = 3 in²
E = 29 x 106 psi
Correct Answer: 3.92
L2
Aluminum
A = 2 in²
E = 10 x 106 psi
L1
Chapter 11 Solutions
Materials for Civil and Construction Engineers (4th Edition)
Ch. 11 - Prob. 11.1QPCh. 11 - Prob. 11.2QPCh. 11 - Prob. 11.3QPCh. 11 - Prob. 11.4QPCh. 11 - Prob. 11.5QPCh. 11 - Prob. 11.6QPCh. 11 - Prob. 11.7QPCh. 11 - Prob. 11.8QPCh. 11 - Prob. 11.9QPCh. 11 - What are the functions of aggregate used in...
Ch. 11 - Prob. 11.11QPCh. 11 - Prob. 11.12QPCh. 11 - What are the benefits of adding dispersed steel...Ch. 11 - Getting measurements from Figure 11.20, determine...Ch. 11 - Three 6 in. 12 in. concrete cylinders with...Ch. 11 - Prob. 11.16QPCh. 11 - Prob. 11.17QPCh. 11 - Prob. 11.18QPCh. 11 - Prob. 11.19QPCh. 11 - Prob. 11.20QPCh. 11 - Prob. 11.21QPCh. 11 - Prob. 11.22QPCh. 11 - Prob. 11.23QPCh. 11 - Prob. 11.24QPCh. 11 - Prob. 11.25QPCh. 11 - Prob. 11.26QPCh. 11 - Prob. 11.27QPCh. 11 - Prob. 11.28QPCh. 11 - Prob. 11.29QPCh. 11 - Prob. 11.30QPCh. 11 - A circular FRP composite rod with continuous and...
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