structure pile property command

Syntax

structure pile property keyword ... <range>

Primary keywords:

cross-sectional-area    density    direction-y    moi-y    moi-z    plastic-moment    plastic-moment-y    plastic-moment-z    plastic-shear    plastic-shear-y    plastic-shear-z    shear-coefficient-y    shear-coefficient-z    spacing    thermal-expansion    torsion-constant    coupling-cohesion-normal    coupling-cohesion-shear    coupling-friction-normal    coupling-friction-shear    coupling-gap-normal    coupling-stiffness-normal    coupling-stiffness-shear    perimeter    slide    slide-tolerance    coupling-cohesion-table    coupling-confining-flag    coupling-confining-table    coupling-friction-table    rockbolt-flag    tensile-failure-strain    yield-compression    yield-tension

Assigns properties to pile elements in the range. The properties consist of constitutive model properties, beam-type properties, coupling-spring properties and rockbolt properties. 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-y f

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

moi-z f

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

plastic-moment f

plastic moment capacity in Y and Z

plastic-moment-y f

plastic moment capacity in Y

plastic-moment-z f

plastic moment capacity in Z

plastic-shear f

plastic shear capacity in Y and Z

plastic-shear-y f

plastic shear capacity in Y

plastic-shear-z f

plastic shear capacity in Z

shear-coefficient-y f

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

shear-coefficient-z f

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

spacing f

spacing (2D only)

thermal-expansion f

thermal-expansion coefficient

torsion-constant f

torsion constant

Coupling-Spring Properties

The coupling springs connect the pile to the target object (zones in FLAC3D and 3DEC, and particles in PFC3D). The coupling-spring properties are as follows. Refer to Coupling-Spring Properties for a detailed description of the coupling-spring properties.

coupling-cohesion-normal f

normal coupling spring cohesion per unit length

coupling-cohesion-shear f

shear coupling spring cohesion per unit length

coupling-friction-normal f

normal coupling spring friction angle

coupling-friction-shear f

shear coupling spring friction angle

coupling-gap-normal b

normal coupling spring gap-use flag

coupling-stiffness-normal f

normal coupling spring stiffness

coupling-stiffness-shear f

shear coupling spring stiffness

perimeter f

exposed perimeter

slide b

large-strain sliding flag

slide-tolerance f

large-strain sliding tolerance

Rockbolt Properties

The rockbolt properties are as follows. Refer to Rockbolt Properties for a detailed description of these properties.

coupling-cohesion-table s

name of the table relating cohesion of shear coupling spring to relative shear displacement

coupling-confining-flag b

flag to activate incremental confining stress logic

coupling-confining-table s

name of the table relating effective confining stress factor to deviatoric stress

coupling-friction-table s

name of the table relating friction angle of shear coupling spring to relative shear displacement

rockbolt-flag b

flag to activate rockbolt logic

tensile-failure-strain f

tensile failure strain (non-dimensional, only active if rockbolt-flag is on)

yield-compression f

axial compressive yield strength (force unit, only active if rockbolt-flag is on)

yield-tension f

axial tensile yield strength (force unit, only active if rockbolt-flag is on)