Bbar Brick Element

This command is used to construct an eight-node mixed volume/pressure brick element object, which uses a trilinear isoparametric formulation.

element('bbarBrick', eleTag, *eleNodes, matTag, <b1, b2, b3>)
eleTag (int) unique element object tag
eleNodes (list (int)) a list of eight element nodes in bottom and top faces and in counter-clockwise order
matTag (int) tag of nDMaterial
b1 b2 b3 (float) body forces in global x,y,z directions


  1. Node numbering for this element is different from that for the eight-node brick (Brick8N) element.
  2. The valid queries to a Quad element when creating an ElementRecorder object are ‘forces’, ‘stresses’, ‘strains’, and ‘material $matNum matArg1 matArg2 …’ Where $matNum refers to the material object at the integration point corresponding to the node numbers in the isoparametric domain.

See also