A load of 425 kN/m is carried on a strip footing 2 m wide at a depth of 1 m in a stiff clay of saturated unit weight 21 kN/m³, the water table being at ground level. Determine the factor of safety with respect to shear failure (a) when 105 kN/m² and t O and (b) whon 10 kN/m² and d 20⁰

A load of 425 kN/m is carried on a strip footing 2 m wide at a depth of 1 m in a stiff clay of saturated unit weight 21 kN/m³, the water table being at ground level. Determine the factor of safety with respect to shear failure (a) when 105 kN/m² and t O and (b) whon 10 kN/m² and d 20⁰

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 load of 425 kN/m is carried on a strip footing 2m wide at a depth of 1 m in a
stiff clay of saturated unit weight 21 kN/m³, the water table being at ground
level. Determine the factor of safety with respect to shear failure (a) when
Cu = 105 kN/m² and ou = 0 and (b) when c' = 10 kN/m² and o' = 28°.

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