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Civil Engineering PE

Category - Earth Structures

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Which of the following equations is used for evaluating a structure’s factor of safety with respect to bearing capacity (FS_bc)?

FS_bc = ultimate bearing capacity of foundation soil / maximum pressure below the base
FS_bc = maximum pressure below the base / minimum pressure below the base
FS_bc = ultimate bearing capacity of foundation soil / minimum pressure below the base
FS_bc = maximum pressure below the base / ultimate bearing capacity of foundation soil

Explanation

Answer: A - The equation FS_bc = ultimate bearing capacity of the foundation soil / maximum pressure below the base is used for evaluating a structure’s factor of safety with respect to bearing capacity. Typically, a minimum factor of safety of 3 is required. FS_bc is expressed as follows:

FS_bc = q_u / q_max

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