Bearing Pressure

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Description

This function computes the gross bearing pressure that a soil would experience due to a foundation.

Usage

1
bearingPressure(P, B, L, D, Dw, metric, gammaW = NA, gammaC = NA)

Arguments

P

Vertical gross column load (lb or kN)

B

foundation width (ft or m)

L

foundation length (ft or m)

D

Depth of foundation (ft or m)

Dw

Depth of groundwater table below foundation base (ft or m)

metric

logical variable: TRUE (for metric units) or FALSE (for English units)

gammaW

unit weight of water (default = 62.4 pcf for English units; 9.81 kN/m^3 for metric units)

gammaC

unit weight of concrete (default = 150 pcf for English units; 23.6 kN/m^3 for metric units)

Details

  • Either SI or English units can be used, but must stay consistent.

  • When specifying the length and width, L should be the longer of the two lengths.

  • For a continuous (strip) foundation, specify L = 1 and specify P as the load per unit length.

  • When the groundwater table is deep or unknown, set Dw >= D.

Value

Gross bearing pressure of footing (psf or kPa)

Author(s)

James Kaklamanos <kaklamanosj@merrimack.edu> and Kyle Elmy <ElmyK@merrimack.edu>

See Also

bearingPressure, bearingCapacityFactors

Examples

1
2
##  Calculation of bearing pressure under a rectangular footing
bearingPressure(P = 1000, B = 2, L = 5, D = 6, Dw = 2, metric = FALSE)