3.1.10.67. RJWatsonEQSBearing Element

This command constructs an RJ Watson EQS sliding bearing element with separate uniaxial materials for axial; shear; and moment directions. Shear friction uses a friction model. The iNode represents the sliding surface.

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

element RJWatsonEqsBearing $eleTag $iNode $jNode $frnMdlTag $kInit -P $matTag -Vy $matTag -Vz $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
$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 shear in local y (`-Vy`)
$matTag	integer	uniaxial material tag for shear in local z (`-Vz`; 3D only)
$matTag	integer	uniaxial material tag for torsion (`-T`; 3D only)
$matTag	integer	uniaxial material tag for moment about local y (`-My`)
$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)

Note

In 2D problems use -Vy and -Mz. In 3D problems use -Vy, -Vz, -T, -My, and -Mz.
Valid Element Recorder queries include force, localForce, basicForce, localDisplacement, basicDisplacement, and material $matNum ....

Example

Tcl Code

element RJWatsonEqsBearing 1 1 2 1 250.0 -P 1 -Vy 2 -Mz 3

Python Code

element('RJWatsonEqsBearing', 1, 1, 2, 1, 250.0, '-P', 1, '-Vy', 2, '-Mz', 3)

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