4.13.4. Radau

beamIntegration('Radau', tag, secTag, N)

beamIntegration('Radau', tag, N, *secTags)

Gauss–Radau integration: uncommon in force-based elements because only one end holds an integration point; useful as building block for plastic-hinge schemes. Places N Gauss–Radau points with a point at node I. Order of accuracy: \(2N-2\).

Prismatic / non-prismatic: same pattern as Lobatto.

Example

import openseespy.opensees as ops

ops.beamIntegration('Radau', 2, 1, 6)
ops.beamIntegration('Radau', 3, 4, 1, 2, 2, 1)