The structural engineer for this building has determined that the columns will be circular, and each will carry a load of130 tons (1 ton = 2000 Ibs.). You are asked to design a square footing that will be placed 5 feet below the ground surface in sand. The sand has an effective unit weight of 73 lb/ft? and an angle of shearing resistance of 30 degrees. The water table is at the ground surface. Assume a factor of safety of three. evious-unit weight of 73 lb/ft and an angle of shearing resistance of 30 degrees. The water taTABLE 6.1 Terzaghi's Bearing Capacity Factors-Eqs. (6.17), (6.15), and (6.13)"N₁ N,"N₁N₁1.002627.0914.211.102729.2415.901.222831.6117.811.352934.2419.981.493037.1622.461.643140.4125.281.813244.0428.522.00.3348.0932.232.213452.6436.503557.7541.443663.5347.163770.0153.803877.5061.553985.9770.614095.6681.2741106.8193.8542119.67108.7543 134.58126.5044 151.95147.7445172.2846 196.2247 224.5548258.2849 298.7150 347.50d'0.12345678910111213141516171819202122232425Ne5.706.006.306.626.977.347.738.158.99.099.6110.1610.7611.4112.1112.8613.6814.6015.1216.5617.6918.9220.2721.7523.3625.132.442.692.983.293.634.024.454.925.456.046.707.448.269.1910.2311.4012.72.71303310.000.010.040.060.100.140.200.270.350.440.560.690.851.041.261.521.822.182.593.073.644.315.096.007.088.34$'.N₂"9.8411.6013.7016.1819:1322.6526.8731.9438.0445.4154.3665.2778.6195.03115.31140.51171.99211.56261.60173.28325.34204.19407.11241.80512.84287.85650.67344.63831.99415.14 1072.80●

Answered: You are asked to design a square…

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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Question

The structural engineer for this building has determined that the columns will be circular, and each will carry a load of 130 tons (1 ton = 2000 Ibs.). You are asked to design a square footing that will be placed 5 feet below the ground surface in sand. The sand has an effective unit weight of 73 lb/ft? and an angle of shearing resistance of 30 degrees. The water table is at the ground surface. Assume a factor of safety of three.

evious
-
unit weight of 73 lb/ft and an angle of shearing resistance of 30 degrees. The water ta
TABLE 6.1 Terzaghi's Bearing Capacity Factors-Eqs. (6.17), (6.15), and (6.13)"
N₁ N,"
N₁
N₁
1.00
26
27.09
14.21
1.10
27
29.24
15.90
1.22
28
31.61
17.81
1.35
29
34.24
19.98
1.49
30
37.16
22.46
1.64
31
40.41
25.28
1.81
32
44.04
28.52
2.00
.33
48.09
32.23
2.21
34
52.64
36.50
35
57.75
41.44
36
63.53
47.16
37
70.01
53.80
38
77.50
61.55
39
85.97
70.61
40
95.66
81.27
41
106.81
93.85
42
119.67
108.75
43 134.58
126.50
44 151.95
147.74
45
172.28
46 196.22
47 224.55
48
258.28
49 298.71
50 347.50
d'
0.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Ne
5.70
6.00
6.30
6.62
6.97
7.34
7.73
8.15
8.9
9.09
9.61
10.16
10.76
11.41
12.11
12.86
13.68
14.60
15.12
16.56
17.69
18.92
20.27
21.75
23.36
25.13
2.44
2.69
2.98
3.29
3.63
4.02
4.45
4.92
5.45
6.04
6.70
7.44
8.26
9.19
10.23
11.40
12.72.
7130331
0.00
0.01
0.04
0.06
0.10
0.14
0.20
0.27
0.35
0.44
0.56
0.69
0.85
1.04
1.26
1.52
1.82
2.18
2.59
3.07
3.64
4.31
5.09
6.00
7.08
8.34
$'
.
N₂"
9.84
11.60
13.70
16.18
19:13
22.65
26.87
31.94
38.04
45.41
54.36
65.27
78.61
95.03
115.31
140.51
171.99
211.56
261.60
173.28
325.34
204.19
407.11
241.80
512.84
287.85
650.67
344.63
831.99
415.14 1072.80
●

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