Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Chapter 3, Problem 12P
To determine
The time taken by the driver to accelerate the vehicle from 40 mi/h to 45 mi/h.
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A continuous foundation is shown in Figure 1. If the load eccentricity, e = 0.5 meter.
Determine the ultimate load Qult per unit length of the foundation. Use Mayerhof’s effective
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Calculate also the Factor of Safety for the shallow foundation.
A simply supported beam is subjected to the end couples (bending is about the strong axis) and the axial load shown in the figure
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provided only at the ends. Neglect the weight of the beam and investigate this member as a beam-column. Use Fy
that P40 k and M = 68 ft-k.
For W10 × 33: I = 171 in.4;
10 ft and C₁ = 1.0: Mn = 134 ft-kips and Mn/₁ = 89.3 ft-kips;
=
50 ksi. Suppose
for Lb
for Lc
-
= 10 ft: Pn 330 kips and Pr/c
=
220 kips.
W10 X 33
P
M
M
10'
Pu
A)
+
Ферп 9
a. Use LRFD.
Select the interaction formula:
Mur
84, Mnz
Muy
+
<1.0
Фь Мпу
Pu
Mur
Muy
B)
+
+
≤ 1.0
20c Pn
Фь Мих
nx
ФоМпу
-Select- ✓
Compute the interaction formula.
(Express your answer to three significant figures.)
-Select- 1.0
This member is -Select-
b. Use ASD.
Select the interaction formula:
Ра
8
Max
May
A)
+
+
<1.0
Pn/c
Mnx/b Mny/b
Pa
Max
May
B)
+
+
1.0
2Pn/c Mnx/b Mny/b
-Select-
Compute the…
Determine whether the given member satisfies the appropriate AISC interaction equation. Do not consider moment amplification. The loads are
50% dead load and 50% live load. Bending is about the x axis, and the steel is ASTM A992. Suppose that P = 280 k.
For W12 x 106 with Fy = 50 ksi and Lc = 14 feet:
Ферп 1130 kips, Pn/Sc
= 755 kips,
Mn = 597 ft-kips, Mn/₁ = 397 ft-kips.
P
240 ft-k
W12 X 106
14'
K₁ = Ky
= 1.0
240 ft-k
a. Use LRFD.
P
Determine the factored axial compressive load and the factored bending moment.
(Express your answers to three significant figures.)
P₁ =
Mu =
kips
ft-kips
Select the interaction formula:
P₁
A)
+
Мих
Muy
+
≤1.0
Ферп 9 Фь Мих
of Mny
Pu
Мих
Muy
B)
+
20c Pn
Mnz
+
<1.0
Фь Мпу
-Select-
Compute the interaction formula.
(Express your answer to three significant figures.)
-Select- 1.0
This member -Select-
b. Use ASD.
the AISC Specification.
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(Express your answers to three significant…
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Traffic and Highway Engineering
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