3.1.10.57. FlatSliderBearingElement

This command constructs a two-node flat slider bearing element. The iNode represents the flat sliding surface and the jNode the slider. Shear behavior uses a friction model; axial and rotational behavior use uniaxialMaterial Command objects. The axial material is modified for no-tension behavior to capture uplift.

element flatSliderBearing $eleTag $iNode $jNode $frnMdlTag $kInit -P $matTag -Mz $matTag <-orient $x1 $x2 $x3 $y1 $y2 $y3> <-shearDist $sDratio> <-doRayleigh> <-mass $m> <-iter $maxIter $tol>
element flatSliderBearing $eleTag $iNode $jNode $frnMdlTag $kInit -P $matTag -T $matTag -My $matTag -Mz $matTag <-orient <$x1 $x2 $x3> $y1 $y2 $y3> <-shearDist $sDratio> <-doRayleigh> <-mass $m> <-iter $maxIter $tol>

Argument

Type

Description

$eleTag

integer

unique element tag

$iNode $jNode

integer

end nodes (iNode is flat sliding surface)

$frnMdlTag

integer

tag of a previously defined friction model

$kInit

float

initial elastic stiffness in local shear direction

$matTag

integer

uniaxial material tag for axial behavior (-P)

$matTag

integer

uniaxial material tag for torsion (-T; 3D only)

$matTag

integer

uniaxial material tag for moment about local y (-My; 3D only)

$matTag

integer

uniaxial material tag for moment about local z (-Mz)

$sDratio

float

shear distance from iNode as fraction of element length (optional; default 0.0)

$m

float

element mass (optional; default 0.0)

$maxIter $tol

integer float

equilibrium iteration limit and tolerance (optional; defaults 20 and 1e-8)

Note

  1. P-Delta moments are transferred entirely to the flat sliding surface (iNode) by default.

  2. Friction depends on axial force and slip rate; use a smaller time step for dynamic analysis when needed.

  3. Valid Element Recorder queries include force, localForce, basicForce, localDisplacement, basicDisplacement, and material $matNum ....

Example

  1. Tcl Code

element flatSliderBearing 1 1 2 1 250.0 -P 1 -Mz 2 -orient 0 1 0 -1 0 0

  1. Python Code

element('flatSliderBearing', 1, 1, 2, 1, 250.0, '-P', 1, '-Mz', 2, '-orient', 0, 1, 0, -1, 0, 0)

Code developed by: Andreas Schellenberg, University of California, Berkeley