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MindTap Engineering for Haik/Sivaloganathan/Shahin’s Engineering Design Process, 3rd Edition, [Instant Access], 2 terms (12 months)
3rd Edition
ISBN: 9781305387300
Author: Yousef Haik; Sangarappillai Sivaloganathan; Tamer M. Shahin
Publisher: Cengage Learning US
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Chapter 7.9, Problem 7P
Devise a metric and a corresponding set for the need that a roofing material should last many years.
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A gravity retaining wall is shown in the figure below. Calculate the factor of safety with respect to overturning and sliding, given the following data:
Wall dimensions: H = 6 m, x₁ = 0.6 m, x2 = 2 m, x3 = 2m,
x4 0.5 m, x5 = 0.75 m, x6 = 0.8 m, D= 1.5 m
Soil properties: 71 = 14 kN/m³, ₁ = 32°, 72 = 18 kN/m³,
2=22°, c₂ = 40 kN/m²
Y₁
c₁ = 0
H
Φί
x5
x6
Use the Rankine active earth pressure in your calculation. Use Yconcrete = 23.08 kN/m³. Also, use k₁ = k₂ = 2/3 and Pp = 0 in the equation
FS (sliding)
(ΣV) tan(k102) + Bk2c2 + Pp
Pa cos a
(Enter your answers to three significant figures.)
FS (overturning)
FS (sliding)
=
For the cantilever retaining wall shown in the figure below, let the following data be given:
Wall dimensions: H = 8 m, x1 = 0.4 m, x2 = 0.6 m, x3 = 1.5 m,
x4 3.5 m, x5 = 0.96 m, D= 1.75 m, a = 10°
Soil properties: 71 = 14.8 kN/m³, ₁ = 32°, Y₂ = 1
2 = 28°, c = 30 kN/m²
17.6 kN/m³,
The value of Ka is 0.3210. For 2 = 28°: N = 25.80; N₁ = 14.72; N₁ = 16.72.
c=0
H
Χς
Calculate the factor of safety with respect to overturning, sliding, and bearing capacity. Use Yconcrete = 21.58 kN/m³. Also, use k₁ = k₂ = 2/3 and P = 0 in the equation
FS (sliding)
(ΣV) tan(k₁₂) + Bk2C + Pp
Pa cosa
(Enter your answers to three significant figures.)
FS (overturning)
FS (sliding)
FS (bearing)
=
4 What determines the power rating of a ma-
chine?
-5 If we cover up the vents in a motor, its out-
put power must be reduced. Explain.
-6 If a motor operates in a cold environment,
may we load it above its rated power? Why?
Chapter 7 Solutions
MindTap Engineering for Haik/Sivaloganathan/Shahin’s Engineering Design Process, 3rd Edition, [Instant Access], 2 terms (12 months)
Ch. 7.9 - A set of measurable parameters with values...Ch. 7.9 - Given the need statement Design a domestic heating...Ch. 7.9 - Generate engineering characteristics for the...Ch. 7.9 - Develop a list of specifications for the following...Ch. 7.9 - List a set of metrics corresponding to the need...Ch. 7.9 - Devise a metric and a corresponding set for the...Ch. 7.9 - How might you establish precise and measurable...Ch. 7.9 - Can poor performance relative to one specification...Ch. 7.9 - Use a Web search engine to identify a list of...
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