The applied load on a shallow square foundation makes an angle of 15° with the vertical. Given: B = 5.5 ft, D; = 4 ft, y 350 lb/ft?. Use FS = 4 and determine the gross allowable load. Use Eq. (3.23). Use the bearing capacity, shape, depth, and inclination factors given in Section 3.6. = 107 lb/ft', ø' = 25°, and c' =

The applied load on a shallow square foundation makes an angle of 15° with the vertical. Given: B = 5.5 ft, D; = 4 ft, y 350 lb/ft?. Use FS = 4 and determine the gross allowable load. Use Eq. (3.23). Use the bearing capacity, shape, depth, and inclination factors given in Section 3.6. = 107 lb/ft', ø' = 25°, and c' =

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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F
Use Terzaghi's equation and Terzaghi's Table
For a shallow foundation shown below: Estimate the ultimate bearing capacity when the water table located at a depth of 2 m below the ground surface. G.S Iz 2 m (2 m x 3 m) Silty clay Yd=17 kN/m³ , Ysat = 20 kN/m³ %3D 6 m c'=78 kN/m? þ'=35° Shear modulus=250 kN/m? CS Scanned with CamScanner
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Assume γ = 105 pcf, D= 4 ft,Q = 2000 lb , F.S = 3, Φ = 34° . Determine the size of the footing.
2. The column load of a square foundation (Figure 1) is given. If the depth of foundation D= 4 ft, 0=30°, and c = 0. Using Terzaghi's bearing capacity equation and FS = 2.5, determine the proper size of the footing. D.L. = 80 kip L.L. = 60 kip qult = 1.3 c N. + qN, + 0.4 y B N, Figure 1 TABLE 2.1 Terzaghi's Bearing Capacity Factors-Eqs. (2.32), (2.33), and (2.34) N. N, N. N. N, N. N, N, Ysoil = 118 pcf 2 ft W.T 1.00 0.00 17 14.60 0.01 18 15.12 1.22 0.04 19 | 16.57 6.62 1.35 0.06 20 | 17.69 1.49 0.10 21 | 18.92 |1.64 0.14 22 20.27 1.81 0.20 23 21.75 2.00 0.27 24 23.36 2.21 0.35 25 25.13 2.44 0.44 26 27.09 9.61 2.69 0.56 27 29.24 5.70 5.45 2.18 34 2.59 35 36 52.64 57.75 36.50 38.04 D; = 4m 6.00 1.1 6.04 41.44 45.41 6.30 6.70 3.07 63.53 47.16 54.36 3.64 4.31 38 5.09 39 70.01 77.50 85.97 95.66 106.81 65.27 78.61 95.03 3 7.44 37 53.80 8.26 9.19 61.55 70.61 4 6.97 5 7.34 3m x2m 6. 7.73 10.23 6.00 40 81.27 115.31 11.40 12.72| 8.34 8.15 7.08 41 93.85 140.51 171.99 211.56 8 8.60 42 119.67…