10.17 Refer to Figure 10.47. A flexible rectangular area is subjected to a uniformly distributed load of q = 330 kN/m². Determine the increase in vertical stress, Aa, at a depth of z = 6 m under points A, B, and C. 18 m
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- Point loads of magnitude 2000, 4000, and 6000 lb act at A, B, and C, respectively as shown. Determine the increase in vertical stress at a depth of 10 ft below point D. Use Boussinesq's equation. a. 110.4 psf b. 89.23 psf C. 106.82 psf d. 99.9 psfProb. 3 The plan of a flexible rectangular loaded area is shown in Figure below. The uniformly distributed load on the flexible area, q, is 100 kN/m². Determine the increase in the vertical stress, Aoz, at a depth of z = 2 m below a. Point A b. Point B c. Point C 4 m 1.6 m 2 m 0.8 m q = 100 kN/m² A 1.2 m-Point loads of magnitude 100,200,and 400kN act at B, C, and D, respectively. Determine the increase in vertical stress at a depth of 6m below point A. Use Boussinesq's equation. er 6: Vertical Stress Increase in Soil 6 m B C 3 m 6 m D Figure P6.2 6.3 Refer to Figure P6.3. Determine the vertical stress increase Ao at|
- 4. The plan of a flexible rectangular loaded area is shown in the figure below. The uniformly distributed load on the flexible area, q, is 100 kN/m² . Determine the increase in the vertical stress, Aoz, at a depth of z = 2 m below а. Рoint A b. Point B c. Point C 4 m 1.6 m |2 m B 0.8 m q = 100 kN/m² A 1.2 m→Refer to Figure P6.4. A strip load of q = 900 lb/ft2 is applied over a width B = 36 ft. Determine the increase in vertical stress at point A located z = 15 ft below the surface. Given: x = 27 ft.Refer to Figure 10.47. A flexible rectangular area is subjected to a uniformly distributed load of q = 330 kN/m². Determine the increase in vertical stress, Au, at a depth of z = 6 m under points A, B, and C. -7.2 m 3.6 m 18 m C q = 330 kN/m² 9m A 5m B
- -10m q=400 kN/m? 5 m 2m |-3m Figure 6.30 6.20 The plan of a flexible rectangular loaded area is shown in Figure 6.30. The uniformly distributed load on the flexible area (q) is 400 kN/m?. Determine the increase in the vertical stress (Ao) at a depth of z = 5 m below a. Point A b. Point B c. Point CRefer to Figure 10.40. Determine the vertical stress increase, Aoz, at point A with the following values: q1 = 90 kN/m; q2 = 325 kN/m; x1 = 4 m; x2 = 2.5 m; z = 3 m Line kad - Line load -6.21 Refer to Figure 6.31. The circular flexible area is uniformly loaded. Given: q = 320 kN/m?. Determine the vertical stress increase Ao at point A. -4 m- Plan Cross-section
- pis) Refer to Figure 3.67, a flexible rectangular area is subjected to a uniformly distributed load of q = 225 kN/m². Determine the increase in vertical stress at depth of z = 3 m under point D. 6 m 2.2 m· |3 m 1 m q = 225 kN/m²Refer to Figure, q1 = 90 kN/m; q2 = 325 %3D %3D kN/m; x1 = 4 m; x2 2.5 m; z = 3 m. the vertical stress increase, at point A is nearly (KN/m2) Line load = 91 Line load = 42 Ao 28.6 O 18.6 O 24.6 OA 50-kip vertical downward column load acts at the centroid of a 4-ft-square (4 ft by 4 ft) normal-weight concrete footing. The footing concrete has a unit weight of 150 pcf. The bottom of this footing is 3 ft below the level ground surface and the top of the footing is flush with the ground surface. The groundwater table is at a depth of 15 ft below the ground surface. Compute the bearing pressure at the base of the footing. Answer: Opsf Oksf A vertical force of 57.2 kips acts on a 4.0 ft x 4.0 ft area. Compute the induced vertical stress, Aoz, at a point 4.0 ft (zf = 4 ft) below the center (xf = 0 ft) of this square area using the following Boussinesq chart. Width = B Square Loaded Area 1.0 05 0.5 1.0