A square footing is proposed to distribute the load on dense soil as shown in Figure.Ground surfaceD=1.75mDense soilc = 75 kPay=17.5kN.m30=33°Gs=2.65e=0.75B=2.5m(a) Calculate the Ultimate bearing capacity of the soil.(b) Calculate Design load, if the factor of safety is 3.0.(c) Compute the change in stress, 1 m below the center of the footing.

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A square footing is proposed to distribute the load on dense soil as shown in Figure. Ground surface D-1.75m Dense soil c = 75 kPa y=17.5kN.m3 0=33° Gs=2.65 B=2.5m e=0.75 (a) Calculate the Ultimate bearing capacity of the soil. (b) Calculate Design load, if the factor of safety is 3.0. (c) Compute the change in stress, 1 m below the center of the footing

A square footing is proposed to distribute the load on dense soil as shown in Figure. Ground surface D-1.75m Dense soil c = 75 kPa y=17.5kN.m3 0=33° Gs=2.65 B=2.5m e=0.75 (a) Calculate the Ultimate bearing capacity of the soil. (b) Calculate Design load, if the factor of safety is 3.0. (c) Compute the change in stress, 1 m below the center of the footing

Structural Analysis

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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

A square footing is proposed to distribute the load on dense soil as shown in Figure.
Ground surface
D=1.75m
Dense soil
c = 75 kPa
y=17.5kN.m3
0=33°
Gs=2.65
e=0.75
B=2.5m
(a) Calculate the Ultimate bearing capacity of the soil.
(b) Calculate Design load, if the factor of safety is 3.0.
(c) Compute the change in stress, 1 m below the center of the footing.

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