3.1.10.85. ShallowFoundationGen

This command generates a two-dimensional Beam-on-Nonlinear-Winkler-Foundation (BNWF) mesh for shallow footing analysis. It reads footing and soil properties from an input file and writes a Tcl source file Foundation_$FoundationTag.tcl containing nodes; elastic beam-column footing elements; zeroLength soil springs; materials; and boundary conditions. Source the generated file after running this command.

ShallowFoundationGen $FoundationTag $ConnectNode $InputFileName $FootingCondition

Argument

Type

Description

$FoundationTag

integer

foundation identifier (also used in output file naming)

$ConnectNode

integer

node tag in the structural model connected to the footing

$InputFileName

string

path to input file with soil; footing; and mesh parameters

$FootingCondition

integer

foundation base condition code from 1 to 5

Note

  1. Footing condition codes: 1 = fixed base; 2 = elastic vertical springs with sliding restrained; 3 = elastic vertical and horizontal springs; 4 = QzSimple2 vertical springs with sliding restrained; 5 = QzSimple2 vertical plus PxSimple1 and TxSimple1 horizontal springs.

  2. Material tags generated by this command start at 101; keep structural material tags at 100 or below.

  3. The input file may use CapSoil $Qult $Pult $Tult $Kv $Kh to specify strength and stiffness directly instead of computing them from soil properties.

  4. This is a model-generation utility; it does not create a single finite element.

Example

  1. Tcl Code

ShallowFoundationGen 1 10 footingInput.dat 4
source Foundation_1.tcl

  1. Python Code

ShallowFoundationGen(1, 10, 'footingInput.dat', 4)
source('Foundation_1.tcl')

Code developed by: Prishati Raychowdhury, UC San Diego