11.1 A continuous foundation is required in a soil where c' =10 kN/m², þ' = 26°, and y = 19.0 kN/m³. The depth ofthe footing will be 1.0 m. The dead load and the live loadare 600 kN/m and 400 kN/m, respectively. Determine therequired width for the foundation based on allowable stressdesign with FS = 3, using Eq. (6.10) and Table 6.1.1qu = c'N. + qNq +5¥BN,(6.10)2 TABLE 6.1 Terzaghi's Bearing Capacity Factors-Eqs. (6.17), (6.15), and (6.13)"N.N.N,"N.N.5.701.000.002627.0914.219.846.001.100.012729.2415.9011.606.301.220.042831.6117.8113.7036.621.350.062934.2419.9816.1846.971.490.103037.1622.4619.1357.341.640.143140.4125.2822.656.7.731.810.203244.0428.5226.8778.152.000.273348.0932.2331.948.8.602.210.353452.6436.5038.049.092.440.443557.7541.4445.41109.612.690.563663.5347.1654.361110.162.980.693770.0153.8065.271210.763.290.853877.5061.5578.611311.413.631.043985.9770.6195.031412.114.021.264095.6681.27115.311512.864.451.5241106.8193.85140.511613.684.921.8242119.67108.75171.991714.605.452.1843134.58126.50211.561815.126.042.5944151.95147.74261.601916.566.703.0745172.28173.28325.342017.697.443.6446196.22204.19407.112118.928.264.3147224.55241.80512.842220.279.195.0948258.28287.85650.672321.7510.236.0049298.71344.63831.992423.3611.407.0850347.50415.141072.802525.1312.728.34

The given data is as follows: c'=10 kN/m2ϕ'=26∘γ=19.0 kN/m3Depth of footing=1.0 mDead load=600…

11.1 A continuous foundation is required in a soil where c' 10 kN/m², þ' = 26°, and y = 19.0 kN/m³. The depth of the footing will be 1.0 m. The dead load and the live load are 600 kN/m and 400 kN/m, respectively. Determine the required width for the foundation based on allowable stress design with FS = 3, using Eq. (6.10) and Table 6.1. 1 qu = c'N. + qN, + yBN, (6.10)

11.1 A continuous foundation is required in a soil where c' 10 kN/m², þ' = 26°, and y = 19.0 kN/m³. The depth of the footing will be 1.0 m. The dead load and the live load are 600 kN/m and 400 kN/m, respectively. Determine the required width for the foundation based on allowable stress design with FS = 3, using Eq. (6.10) and Table 6.1. 1 qu = c'N. + qN, + yBN, (6.10)

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Load and resistance factor design

Load and resistance factors design (LRFD), also known as Limit state design (LSD), refers to the design method used in building engineering. A boundary condition is a condition of a structure where it can no longer meet the relevant design requirements. The condition may refer to the load level or other actions on the structure, while the terms refer to the integrity of the structure, suitability for use, durability, or other design requirements. A structure designed for LRFD is limited to keeping track of all possible actions during its design time and is always ready for use, with the appropriate level of reliability in each boundary condition. LRFD-based construction codes clearly define the appropriate levels of reliability in their instructions.

Question

11.1 A continuous foundation is required in a soil where c' =
10 kN/m², þ' = 26°, and y = 19.0 kN/m³. The depth of
the footing will be 1.0 m. The dead load and the live load
are 600 kN/m and 400 kN/m, respectively. Determine the
required width for the foundation based on allowable stress
design with FS = 3, using Eq. (6.10) and Table 6.1.
1
qu = c'N. + qNq +5¥BN,
(6.10)
2

TABLE 6.1 Terzaghi's Bearing Capacity Factors-Eqs. (6.17), (6.15), and (6.13)"
N.
N.
N,"
N.
N.
5.70
1.00
0.00
26
27.09
14.21
9.84
6.00
1.10
0.01
27
29.24
15.90
11.60
6.30
1.22
0.04
28
31.61
17.81
13.70
3
6.62
1.35
0.06
29
34.24
19.98
16.18
4
6.97
1.49
0.10
30
37.16
22.46
19.13
5
7.34
1.64
0.14
31
40.41
25.28
22.65
6.
7.73
1.81
0.20
32
44.04
28.52
26.87
7
8.15
2.00
0.27
33
48.09
32.23
31.94
8.
8.60
2.21
0.35
34
52.64
36.50
38.04
9.09
2.44
0.44
35
57.75
41.44
45.41
10
9.61
2.69
0.56
36
63.53
47.16
54.36
11
10.16
2.98
0.69
37
70.01
53.80
65.27
12
10.76
3.29
0.85
38
77.50
61.55
78.61
13
11.41
3.63
1.04
39
85.97
70.61
95.03
14
12.11
4.02
1.26
40
95.66
81.27
115.31
15
12.86
4.45
1.52
41
106.81
93.85
140.51
16
13.68
4.92
1.82
42
119.67
108.75
171.99
17
14.60
5.45
2.18
43
134.58
126.50
211.56
18
15.12
6.04
2.59
44
151.95
147.74
261.60
19
16.56
6.70
3.07
45
172.28
173.28
325.34
20
17.69
7.44
3.64
46
196.22
204.19
407.11
21
18.92
8.26
4.31
47
224.55
241.80
512.84
22
20.27
9.19
5.09
48
258.28
287.85
650.67
23
21.75
10.23
6.00
49
298.71
344.63
831.99
24
23.36
11.40
7.08
50
347.50
415.14
1072.80
25
25.13
12.72
8.34

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