Note that the iterative form can improve the rate of global convergence at the expense of more local element computation. The -iter switch enables the iterative form of the flexibility formulation.element nonlinearBeamColumn $eleTag $iNode $jNode $numIntgrPts $secTag $transfTag.element forceBeamColumn $eleTag $iNode $jNode $numIntgrPts $secTag $transfTag.element forceBeamColumn $eleTag $iNode $jNode $transfTag Lobatto $secTag $numIntgrPts.The following three commands give the same element definition (with Gauss-Lobatto integration) despite some apparent permutations of the input arguments: Numerical integration type, options are Lobatto, Legendre, Radau, NewtonCotes, Trapezoidal (optional, default= Lobatto) Identifier for previously-defined section objectĪlternative command (kept for backward compatability):Įlement nonlinearBeamColumn $eleTag $iNode $jNode $numIntgrPts $secTag $transfTag Number of Gauss-Lobatto integration points along the element. Original command that assumes Gauss-Lobatto integration with a copy of the same section force-deformation model at each integration point:Įlement forceBeamColumn $eleTag $iNode $jNode $numIntgrPts $secTag $transfTag Tolerance for satisfaction of element compatibility (optional, default=10-12) Maximum number of iterations to undertake to satisfy element compatibility (optional, default=10) Specifies locations and weights of integration points and their associated section force-deformation models (see File:IntegrationTypes.pdf)Įlement mass density (per unit length), from which a lumped-mass matrix is formed (optional, default=0.0) Identifier for previously-defined coordinate-transformation (CrdTransf) object See File:IntegrationTypes.pdf for more details on the available numerical integration options.Įlement forceBeamColumn $eleTag $iNode $jNode $transfTag "IntegrationType arg1 arg2. This command is used to construct a forceBeamColumn element object, which is based on the iterative force-based formulation.Ī variety of numerical integration options can be used in the element state determination and encompass both distributed plasticity and plastic hinge integration.
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