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MindTap Engineering for Das/Sobhan's Principles of Geotechnical Engineering, SI Edition, 9th Edition, [Instant Access], 2 terms (12 months)
9th Edition
ISBN: 9781305971264
Author: Braja M. Das; Khaled Sobhan
Publisher: Cengage Learning US
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Chapter 14, Problem 14.8P
To determine
Find the passive force
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Consider the geometric and traffic characteristics shown below.
Approach
(Width)
Peak hour Approach Volumes:
Left Turn
Through Movement
Right Turn
Conflicting Pedestrian Volumes
PHF
For the following saturation flows:
North
(56 ft)
South
(56 ft)
East
(68 ft)
West
(68 ft)
165
105
200
166
442
395
585
538
162
157
191
200
900
1,200
1,200
900
0.95
0.95
0.95
0.95
Through lanes:
1,600 veh/h/in
Through-right lanes:
1,400 veh/h/in
Left lanes:
1,000 veh/h/in
Left-through lanes:
1,200 veh/h/in
Left-through-right lanes:
1,100 veh/h/in
The total cycle length was 277 s. Now assume the saturation flow rates are 10% higher, that is, assume the following saturation flow rates:
Through lanes:
Through-right lanes:
Left lanes:
Left-through lanes:
Left-through-right lanes:
1,760 veh/h/in
1,540 veh/h/in
1,100 veh/h/in
1,320 veh/h/in
1,210 veh/h/in
Determine a suitable signal phasing system and phase lengths (in s) for the intersection using the Webster method. (Enter the sum of green and yellow times for…
Determine the minimum of the appropriate yellow interval (Y
.
approach speed limit: 45 mi/h
approach grade: 3.2% downgrade
assumed perception-reaction time: 1.0 sec
assumed deceleration rate: 11.2 ft/sec²
assumed average vehicle length: 20 ft
width of intersection to be crossed: 56 ft
min'
in s) for a signal phase under the following conditions.
Compute the nominal shear strength of an M10 × 7.5 of A572 Grade 60 steel (Fy = 60 ksi).
For M10 × 7.5: d = 9.99 in., tw = 0.13 in., h/tw
Vn
=
x
kips
= 71.
Chapter 14 Solutions
MindTap Engineering for Das/Sobhan's Principles of Geotechnical Engineering, SI Edition, 9th Edition, [Instant Access], 2 terms (12 months)
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- A flexural member is fabricated from two flange plates 1/2 × 71/2 and a web plate 3/8 × 20. The yield stress of the steel is 50 ksi. a. Compute the plastic section modulus Z and the plastic moment Mp with respect to the major principal axis. (Express your answers to three significant figures.) Z = Mp = in. 3 ft-kips b. Compute the elastic section modulus S and the yield moment My with respect to the major principal axis. (Express your answers to three significant figures.) S = My = in.3 ft-kipsarrow_forwardThe beam shown in the figure below has lateral support at the ends only. The concentrated loads are live loads. Use A992 steel and select a shape. Do not check deflections. Use C = 1.0 (this is conservative). Suppose that PL = 20 k. PL PL Use the table below. Shape Mn Mn Vn Vn Ω Ων W12 × 58 216 144 132 87.8 W12 × 65 269 179 142 94.4 W12 × 72 308 205 159 106 W14 × 61 235 157 156 104 W14 × 68 280 187 174 116 W14 × 74 318 212 192 128 W16 × 67 276 184 193 129 18' a. Use LRFD. Calculate the factored-load moment (not including the beam weight). (Express your answer to three significant figures.) Mu = ft-kips Select a shape. -Select- b. Use ASD. Calculate the required flexural strength (not including the beam weight). (Express your answer to three significant figures.) Ma = Select a shape. -Select- ft-kipsarrow_forwardGiven a portion of a pipe network below. Determine the true discharge in each pipe using the Hardy-Cross method. Use the Darcy-Weisbach formula with f = 0.02 for all pipes.arrow_forward
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