1. Restraint
Restraint is the base class for all restraints.
Properties
| Name | Type | Description |
|---|---|---|
| Node | Node | Restrained node |
| Level | string | Level (for seismic analysis) |
| AttachedElement | Element | Element attached to restraint (for local axes - see LCS) |
| LCS | CoordinateSystem | Coordinate system used for restraint directions |
| Label | string | Label |
| LayerID | int | Layer number |
Click here for more information about Node
Click here for more information about Element and Tee
Click here for more information about CoordinateSystem
2. AxialRestraint
AxialRestraint is an abstract class that inherits from Restraint. Every AxialRestraint object has the properties of Restraint.
Properties
| Name | Type | Description |
|---|---|---|
| Stiffness | float | Stiffness |
| Direction | Vector3D | Restrained direction |
Vector3D comes from the library System.Windows.Media.Media3D
# Python script
from System.Windows.Media.Media3D import Vector3D
restraint.Direction = Vector3D(0, 0, 1)
3. LinearRestraint
LinearRestraint inherits from AxialRestraint. It represents linear axial restraints.
Properties
| Name | Type | Description |
|---|---|---|
| Type | LinearRestraintType | Type of restraint |
The type LinearRestraintType is an enumeration with the following values:
| Value | Description |
|---|---|
| Translational | Translational |
| Rotational | Rotational |
| Snubber | Snubber |
4. SpringHanger
SpringHanger inherits from AxialRestraint.
Properties
| Name | Type | Description |
|---|---|---|
| Force | float | Type of restraint |
| PinnedCase | PinnedCase | Pinned case option |
Click here for more information about PinnedCase
5. MultiRestraint
MultiRestraint inherits from Restraint.
Properties
| Name | Type | Description |
|---|---|---|
| Kx | float | Stiffness along X: 0 if free, > 0 if rigid |
| Ky | float | Stiffness along Y: 0 if free, > 0 if rigid |
| Kz | float | Stiffness along Z: 0 if free, > 0 if rigid |
| Krx | float | Stiffness around X: 0 if free, > 0 if rigid |
| Kry | float | Stiffness around Y: 0 if free, > 0 if rigid |
| Krz | float | Stiffness around Z: 0 if free, > 0 if rigid |
6. Anchor
Anchor inherits from Restraint.
Properties
| Name | Type | Description |
|---|---|---|
| Kx | float | Stiffness along X |
| Ky | float | Stiffness along Y |
| Kz | float | Stiffness along Z |
| Krx | float | Stiffness around X |
| Kry | float | Stiffness around Y |
| Krz | float | Stiffness around Z |
7. NonLinearRestraint
NonLinearRestraint inherits from AxialRestraint.
Properties
| Name | Type | Description |
|---|---|---|
| Gapm | float | Negative gap |
| K1m | float | First spring constant in the negative direction |
| K2m | float | Second spring constant in the negative direction |
| FLm | float | Reaction at stiffness transition from K1m to K2m |
| Gapp | float | Positive gap |
| K1p | float | First spring constant in the positive direction |
| K2p | float | Second spring constant in the positive direction |
| FLp | float | Reaction at stiffness transition from K1p to K2p |
| Mu | float | Coulomb coefficient of friction between the pipe and the support |