Structural Analysis
6th Edition
ISBN: 9781337630931
Author: KASSIMALI, Aslam.
Publisher: Cengage,
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Question
a 300 mm thick footing slab supports a 300 mm thick concrete wall carrying uniform service dead load of 214.31 kN/m and service live load of 145.94 kN/m. the base of the wall footing slab is 1.2 m from the ground surface. design parameters are as follows: ysoil = 16 kN/m^3, yconci = 24 kN/m^3. qa = 215.46 kPa. f'c = 27 MPa and fy = 420 MPa.
1. calculate the net allowble bearing capacity of soil in kPa.
a. 192.17
b. 189.06
c. 117.32
d. 176.26
2. calculate the minimum required width of the wall footing slab.
a. 1.9 m
b. 2 m
c. 1.8 m
d. 1.7 m
3. calculate the maxium ultimate moment (kN.m) in the slab if the width of the footing slab is 2.1 m.
a. 82.64
b. 94.63
c. 128.80
d. 111.32
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- A 2.8 m wide x 0.42 m thick RC footing is to be provided for a 250mm thick RC wall. The wall carries a dead load of 161 kN/m and a live load of 224 kN/m of the wall. The gross allowable soil pressure is 260 kPa. The bottom of the footing is 1,031 mm below the ground. Use f'. = 21 MPa and fy = 420 MPa. Unit weight is 23.6 kN/m3 for concrete and 18.4 kN/m3 for the soil backfill. Calculate the ratio of the actual soil pressure to net effective pressure. (q/qeff ). Answer in four decimal places. (i.e. 1.6125, 1.5140, 0.8461, etc.)arrow_forwardA building is constructed on a ground that has the saturated unit weight of soil and water 23 kN/m3 and 9.8 kN/m3, respectively. (The ground water table is located at the ground surface). In this ground condition, the coefficient of lateral earth pressure at rest (K0) is known to be 0.5. At the depth of 2.0m from the surface, the vertical and horizontal induced stresses by the building are known to be 12 kPa and 7 kPa, respectively. Determine the 1) total and 2) effective horizontal stresses at the depth of 2.0m.arrow_forward
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