4.2.6.8. KikuchiBearing Element¶

This command is used to construct a KikuchiBearing element object, which is defined by two nodes. This element consists of multiple shear spring model (MSS) and multiple normal spring model (MNS).

element('KikuchiBearing', eleTag, *eleNodes, '-shape', shape, '-size', size, totalRubber, <'-totalHeight', totalHeight>, '-nMSS', nMSS, '-matMSS', matMSSTag, <'-limDisp', limDisp>, '-nMNS', nMNS, '-matMNS', matMNSTag, <'-lambda', lambda>, <'-orient', <x1, x2, x3>, yp1, yp2, yp3>, <'-mass', m>, <'-noPDInput'>, <'-noTilt'>, <'-adjustPDOutput', ci, cj>, <'-doBalance', limFo, limFi, nIter>)

`eleTag` (int)	unique element object tag
`eleNodes` (list (int))	a list of two element nodes
`shape` (float)	following shapes are available: round, square
`size` (float)	diameter (round shape), length of edge (square shape)
`totalRubber` (float)	total rubber thickness
`totalHeight` (float)	total height of the bearing (defaulut: distance between iNode and jNode)
`nMSS` (int)	number of springs in MSS = nMSS
`matMSSTag` (int)	matTag for MSS
`limDisp` (float)	minimum deformation to calculate equivalent coefficient of MSS (see note 1)
`nMNS` (int)	number of springs in MNS = nMNS*nMNS (for round and square shape)
`matMNSTag` (int)	matTag for MNS
`lambda` (float)	parameter to calculate compression modulus distribution on MNS (see note 2)
`x1` `x2` `x3` (float)	vector components in global coordinates defining local x-axis
`yp1` `yp2` `yp3` (float)	vector components in global coordinates defining vector yp which lies in the local x-y plane for the element
`m` (float)	element mass
`'-noPDInput'` (str)	not consider P-Delta moment
`'-noTilt'` (str)	not consider tilt of rigid link
`ci` `cj` (float)	P-Delta moment adjustment for reaction force (default: `ci` =0.5, `cj` =0.5)
`limFo` `limFi` `nIter` (float)	tolerance of external unbalanced force ( `limFo`), tolorance of internal unbalanced force ( `limFi`), number of iterations to get rid of internal unbalanced force ( `nIter`)