structure beam property command

Syntax

structure beam property keyword ... <range>

Primary keywords:

cross-sectional-area    density    direction-y    moi    moi-y    moi-z    plastic-moment    plastic-moment-y    plastic-moment-z    plastic-shear    plastic-shear-y    plastic-shear-z    shear-coefficient    shear-coefficient-y    shear-coefficient-z    spacing    thermal-expansion    torsion-constant

Assigns properties to beam elements in the range. The properties consist of constitutive model properties, and additional properties of beam-type elements. The constitutive model property names are primary keywords, but are not included in the list above. The following properties are available, with the constitutive model properties listed first.

Beam Constitutive Model Properties

All beam constitutive models have properties associated with them. Properties are name value pairs, where the name is the keyword given in the command and the value type is specific to the property. The assignment will affect any beam-type element in the specified range whose constitutive model includes the property named (noting that some properties, such as young, appear in multiple beam constitutive models). There are four beam constitutive models: one elastic model, and three elastic-plastic models.

Beam Elastic Constitutive Model

• Elastic

  The isotropic elastic model: properties, description.

Beam Elastic-Plastic Constitutive Models

• Mohr Coulomb

  The Mohr Coulomb elasto-plasticity model in one-dimensional mode: properties, model description, plastic-modeling description.

• Mohr Coulomb Strain Softening

  The strain-softening/hardening Mohr Coulomb elasto-plasticity model in one-dimensional mode: properties, model description, plastic-modeling description.

• von Mises

  The von Mises elasto-plasticity model in one-dimensional mode: properties, model description, plastic-modeling description.

Beam-Type Properties

These are the properties of the beam material (see Beam-Type Properties).

cross-sectional-area f

cross-sectional area

density f

mass density

direction-y v

direction-y vector whose projection onto the element cross-section defines the \(y\)-axis of the element coordinate system

moi f (2D ONLY)

second moment

moi-y f (3D ONLY)

moment of inertia with respect to element \(y\)-axis

moi-z f (3D ONLY)

moment of inertia with respect to element \(z\)-axis

plastic-moment f

plastic moment capacity in Y and Z

plastic-moment-y f (3D ONLY)

plastic moment capacity in Y

plastic-moment-z f (3D ONLY)

plastic moment capacity in Z

plastic-shear f

plastic shear capacity in Y and Z

plastic-shear-y f (3D ONLY)

plastic shear capacity in Y

plastic-shear-z f (3D ONLY)

plastic shear capacity in Z

shear-coefficient f (2D ONLY)

shear coefficient for transverse shear deformation in the \(y\)-direction (Timoshenko beam element only)

shear-coefficient-y f (3D ONLY)

shear coefficient for transverse shear deformation in the \(y\)-direction (Timoshenko beam element only)

shear-coefficient-z f (3D ONLY)

shear coefficient for transverse shear deformation in the \(z\)-direction (Timoshenko beam element only)

spacing f (2D ONLY)

out-of-plane distance between beam-type elements

thermal-expansion f

thermal-expansion coefficient

torsion-constant f (3D ONLY)

torsion constant