A square footing is shown in Figure P3.10. Using a factor of safety of 6, determine the size of footing. 445 kN 68 kN-m 15.7 kN/m = 30° Groundwater BXB table Y = 18.9 kN/m e' =0 d' = 30° Figure P3.10

A square footing is shown in Figure P3.10. Using a factor of safety of 6, determine the size of footing. 445 kN 68 kN-m 15.7 kN/m = 30° Groundwater BXB table Y = 18.9 kN/m e' =0 d' = 30° Figure P3.10

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter6: Shallow Foundations: Ultimate Bearing Capacity

Section: Chapter Questions

Problem 6.14P: A 2 m 3 m spread footing placed at a depth of 2 m carries a vertical load of 3000 kN and a moment...

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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 shown in Figure P3.10. Using a factor of safety of 6, determine the
size of footing.
445 kN
68 kN-m
15.7 kN/m
1.2
- 30°
BXB
Groundwater
table
Yu = 18.9 kN/m
c' =0
d'= 30°
Figure P3.10

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Step 1:The given data is:

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Step 2:Calculating the eccentricity e:

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Step 3:To find the effective area:

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Step 4:Calculations:

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Step 5:Calculating shape factor and depth factor:

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Step 6:The size of the footing:

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