PRINCIPLES OF GEOTECH.ENGINEERING >LL+M
9th Edition
ISBN: 9781337583879
Author: Das
Publisher: CENGAGE L
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Chapter 11, Problem 11.12P
(a)
To determine
Calculate the void ratio that corresponds to a pressure
(b)
To determine
Calculate the void ratio at a pressure of
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Students have asked these similar questions
Select a W-shape for the following conditions:
Beam spacing = 12 ft
Span length = 25 ft
Slab and deck combination weight = 43 psf
Partition load = 20 psf
Ceiling weight = 5 psf
Flooring weight = 2 psf
Live load 160 psf
Fy
= 50 ksi
The maximum live load deflection cannot exceed L/340.
Shape
Mp (ft-kips) M₁/ (ft-kips) Vn (kips) Vn/v (kips) Ix (in.
Vn/n, (kips) I. (in.)
W14 × 61
383
254
156
104
640
W21 × 44
358
238
217
145
843
W16 × 50
345
230
186
124
659
W18 × 46
340
226
195
130
712
a. Use LRFD.
Calculate the required moment of inertia, the required moment strength, and the maximum shear.
(Express your answers to three significant figures.)
Ix
=
in.
4
Μι
=
Vu
Select a shape:
-Select-
b. Use ASD.
ft-kips
kips
Calculate the required moment of inertia, the required moment strength, and the maximum shear.
(Express your answers to three significant figures.)
Ix
Ma
=
Va =
Select a shape:
-Select-
4
in.
ft-kips
kips
The beam shown in the figure below has continuous lateral support of both flanges. The uniform load is a service load
consisting of 70% dead load and 30% live load. The dead load includes the weight of the beam.
6 k/ft
+9
18'
If A992 steel is used, is a W12 × 35 adequate?
For A992 steel: Fy
=
50 ksi.
bf
h
For W12 x 35:
= 6.31,
=
36.2 in., Zx
2tf
tw
(Express your answers to three significant figures.)
a. Use LRFD.
Mu
Фомп
=
ft-kips
ft-kips
A W12 × 35 is -Select-
b. Use ASD.
Ma
=
ft-kips
Mn
ft-kips
26
A W12 × 35 is -Select-
=
+6→
51.2 in.
3
Verify the value of Zx for a W10 × 30 that is tabulated in the dimensions and properties tables in Part 1 of the
Manual.
For W10 × 30: Ag
Use the table below.
-
8.84 in.2, d 10.5 in.
AISC Manual Label y (in.)
WT 9 × 25
2.12
WT 8 × 25
1.89
WT 7 × 24
1.35
WT 6 × 25
1.17
WT 5 × 15
1.10
(Express your answer to three significant figures.)
Zx
=
3
in.
Chapter 11 Solutions
PRINCIPLES OF GEOTECH.ENGINEERING >LL+M
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